网络接口协议 JSON 解析 Crash 的哪些事

#import <Foundation/Foundation.h>

@interface NSString (SHYUtil)

/*!
 @method charValue
 @abstract 把字符串转为char类型
 @result 返回char
 */
- (char)charValue;

/*!
 @method unsignedCharValue
 @abstract 把字符串转为unsigned char类型
 @result 返回unsigned char
 */
- (unsigned char)unsignedCharValue;

/*!
 @method shortValue
 @abstract 把字符串转为short类型
 @result 返回short
 */
- (short)shortValue;

/*!
 @method unsignedShortValue
 @abstract 把字符串转为unsigned short类型
 @result 返回unsigned short
 */
- (unsigned short)unsignedShortValue;

/*!
 @method unsignedIntValue
 @abstract 把字符串转为unsigned int类型
 @result 返回unsigned int
 */
- (unsigned int)unsignedIntValue;

/*!
 @method longValue
 @abstract 把字符串转为long类型
 @result 返回long
 */
- (long)longValue;

/*!
 @method unsignedLongValue
 @abstract 把字符串转为unsigned long类型
 @result 返回unsigned long
 */
- (unsigned long)unsignedLongValue;

/*!
 @method longLongValue
 @abstract 把字符串转为long long int类型
 @result 返回long long int
 */
- (long long int)longLongValue;

/*!
 @method unsignedLongLongValue
 @abstract 把字符串转为unsigned long long类型
 @result 返回unsigned long long
 */
- (unsigned long long)unsignedLongLongValue;

/*!
 @method unsignedIntegerValue
 @abstract 把字符串转为NSUInteger类型
 @result 返回NSUInteger
 */
- (NSUInteger)unsignedIntegerValue;

/*!
 @method numberValue
 @abstract 把字符串转为NSNumber类型
 @result 返回NSNumber
 */
- (NSNumber *)numberValue;

/*!
 @method arrayValue
 @abstract 把字符串转为NSArray类型
 @result 返回NSArray
 */
- (NSArray *)arrayValue;

/*!
 @method dictionaryValue
 @abstract 把字符串转为NSDictionary类型
 @result 返回NSDictionary
 */
- (NSDictionary *)dictionaryValue;

/*!
 @method dataValue
 @abstract 把字符串转为NSData类型，只支持UTF-8有损转换；排UTF-8编码的请用 dataUsingEncoding: 方法转
 @result 返回NSData
 */
- (NSData *)dataValue;

/*!
 @method decimalValue
 @abstract 把字符串转为NSDecimal类型
 @result 返回NSDecimal
 */
- (NSDecimal)decimalValue;

/*!
 @method decimalNumberValue
 @abstract 把字符串转为NSDecimalNumber类型
 @result 返回NSDecimalNumber
 */
- (NSDecimalNumber *)decimalNumberValue;


@end



#import "NSString+SHYUtil.h"
#import <CommonCrypto/CommonDigest.h>

#define SHY_CONVERT_USING(strtowhat) {    char buf[24];        if ([self getCString:buf maxLength:24 encoding:NSASCIIStringEncoding])         return strtowhat(buf, NULL, 10);    }     return strtowhat([self UTF8String], NULL, 10);

@implementation NSString (SHYUtil)

- (char)charValue
{
    const char *str = [self UTF8String];
    return str[0];
}

- (unsigned char)unsignedCharValue
{
    const char *str = [self UTF8String];
    return (unsigned char)str[0];
}

- (short)shortValue
{
    int i = [self intValue];
    return (short)i;
}

- (unsigned short)unsignedShortValue
{
    return (unsigned short)[self unsignedLongValue];
}

- (unsigned int)unsignedIntValue
{
    return (unsigned int)[self unsignedLongValue];
}

- (long)longValue
{
    SHY_CONVERT_USING(strtol);
}

- (unsigned long)unsignedLongValue
{
    SHY_CONVERT_USING(strtoul);
}

- (long long int)longLongValue
{
    SHY_CONVERT_USING(strtoll);
}

- (unsigned long long)unsignedLongLongValue
{
    SHY_CONVERT_USING(strtoull);
}

- (NSUInteger)unsignedIntegerValue
{
    return (NSUInteger)[self unsignedLongValue];
}

- (NSNumber *)numberValue
{
    NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
    return [formatter numberFromString:self];
}

- (NSArray *)arrayValue
{
    return [NSArray arrayWithObject:self];
}

- (NSDictionary *)dictionaryValue
{
    return [self propertyList];
}

- (NSData *)dataValue
{
    return [self dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
}

- (NSDecimal)decimalValue
{
    return [[NSDecimalNumber decimalNumberWithString:self] decimalValue];
}

- (NSDecimalNumber *)decimalNumberValue
{
    return [NSDecimalNumber decimalNumberWithString:self];
}

@end

NSArray的扩展

@interface NSArray (SHYUtil)

/*!
 @method anyObject
 @abstract 获取数组里的一个对象，索引号小的优先返回
 @result 返回数组里的一个对象
 */
- (id)anyObject;

/*!
 @method isEmpty
 @abstract 是否没有对象，没有对象也是为YES；
 @result 返回BOOL
 */
- (BOOL)isEmpty;

/*!
 @method objectAtIndexCheck:
 @abstract 检查是否越界和NSNull如果是返回nil
 @result 返回对象
 */
- (id)objectAtIndexCheck:(NSUInteger)index;

/*!
 @method objectAtIndexCheck:class:defaultValue:
 @abstract 获取指定index的对象并检查是否越界和NSNull如果是返回nil
 @param index 索引号
 @param aClass 检查类型
 @result 返回对象
 */
- (id)objectAtIndexCheck:(NSUInteger)index class:(__unsafe_unretained Class)aClass;

/*!
 @method objectAtIndexCheck:class:defaultValue:
 @abstract 获取指定index的对象并检查是否越界和NSNull如果是返回nil,获取失败返回为指定的defaultValue
 @param index 索引号
 @param aClass 检查类型
 @param defaultValue 获取失败要返回的值
 @result 返回对象，获取失败为指定的defaultValue
 */
- (id)objectAtIndexCheck:(NSUInteger)index class:(__unsafe_unretained Class)aClass defaultValue:(id)defaultValue;

/*!
 @method arrayAtIndex:
 @abstract 获取指定index的NSArray类型值
 @param index 索引号
 @result 返回NSArray，获取失败为nil
 */
- (NSArray *)arrayAtIndex:(NSUInteger)index;

/*!
 @method arrayAtIndex:defaultValue:
 @abstract 获取指定index的NSArray类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回NSArray，获取失败为指定的defaultValue
 */
- (NSArray *)arrayAtIndex:(NSUInteger)index defaultValue:(NSArray *)defaultValue;

/*!
 @method mutableArrayAtIndex:
 @abstract 获取指定index的NSMutableArray类型值
 @param index 索引号
 @result 返回NSMutableArray，获取失败为nil
 */
- (NSMutableArray *)mutableArrayAtIndex:(NSUInteger)index;

/*!
 @method mutableArrayAtIndex:defaultValue:
 @abstract 获取指定index的NSMutableArray类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回NSMutableArray，获取失败为指定的defaultValue
 */
- (NSMutableArray *)mutableArrayAtIndex:(NSUInteger)index defaultValue:(NSArray *)defaultValue;

/*!
 @method dictionaryAtIndex:
 @abstract 获取指定index的NSDictionary类型值
 @param index 索引号
 @result 返回NSDictionary，获取失败为nil
 */
- (NSDictionary *)dictionaryAtIndex:(NSUInteger)index;

/*!
 @method dictionaryAtIndex:defaultValue:
 @abstract 获取指定index的NSDictionary类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回NSDictionary，获取失败为指定的defaultValue
 */
- (NSDictionary *)dictionaryAtIndex:(NSUInteger)index defaultValue:(NSDictionary *)defaultValue;

/*!
 @method mutableDictionaryAtIndex:
 @abstract 获取指定index的NSMutableDictionary类型值
 @param index 索引号
 @result 返回NSMutableDictionary，获取失败为nil
 */
- (NSMutableDictionary *)mutableDictionaryAtIndex:(NSUInteger)index;

/*!
 @method mutableDictionaryAtIndex:defaultValue:
 @abstract 获取指定index的NSMutableDictionary类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回NSMutableDictionary，获取失败为指定的defaultValue
 */
- (NSMutableDictionary *)mutableDictionaryAtIndex:(NSUInteger)index defaultValue:(NSDictionary *)defaultValue;

/*!
 @method dataAtIndex:
 @abstract 获取指定index的NSData类型值
 @param index 索引号
 @result 返回NSData，获取失败为nil
 */
- (NSData *)dataAtIndex:(NSUInteger)index;

/*!
 @method dataAtIndex:defaultValue:
 @abstract 获取指定index的NSData类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回NSData，获取失败为指定的defaultValue
 */
- (NSData *)dataAtIndex:(NSUInteger)index defaultValue:(NSData *)defaultValue;

/*!
 @method stringAtIndex:
 @abstract 获取指定index的NSString类型值
 @param index 索引号
 @result 返回NSString，获取失败为nil
 */
- (NSString *)stringAtIndex:(NSUInteger)index;

/*!
 @method stringAtIndexToString:
 @abstract 获取指定index的NSString类型值
 @param index 索引号
 @result 返回字NSString，获取失败为@""
 */
- (NSString *)stringAtIndexToString:(NSUInteger)index;

/*!
 @method stringAtIndex:defaultValue:
 @abstract 获取指定index的NSString类型值,获取失败返回为指定的defaultValue
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回NSString，获取失败为指定的defaultValue
 */
- (NSString *)stringAtIndex:(NSUInteger)index defaultValue:(NSString *)defaultValue;

/*!
 @method numberAtIndex:
 @abstract 获取指定index的NSNumber类型值
 @param index 索引号
 @result 返回NSNumber，获取失败为nil
 */
- (NSNumber *)numberAtIndex:(NSUInteger)index;

/*!
 @method numberAtIndex:defaultValue:
 @abstract 获取指定index的NSNumber类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回NSNumber，获取失败为指定的defaultValue
 */
- (NSNumber *)numberAtIndex:(NSUInteger)index defaultValue:(NSNumber *)defaultValue;

/*!
 @method charAtIndex:
 @abstract 获取指定index的NSNumber类型值
 @param index 索引号
 @result 返回char
 */
- (char)charAtIndex:(NSUInteger)index;

/*!
 @method unsignedCharAtIndex:
 @abstract 获取指定index的unsigned char类型值
 @param index 索引号
 @result 返回unsigned char
 */
- (unsigned char)unsignedCharAtIndex:(NSUInteger)index;

/*!
 @method shortAtIndex:
 @abstract 获取指定index的short类型值
 @param index 索引号
 @result 返回short，获取失败为0
 */
- (short)shortAtIndex:(NSUInteger)index;

/*!
 @method shortAtIndex:defaultValue:
 @abstract 获取指定index的short类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回short，获取失败为指定的defaultValue
 */
- (short)shortAtIndex:(NSUInteger)index defaultValue:(short)defaultValue;

/*!
 @method unsignedShortAtIndex:
 @abstract 获取指定index的unsigned short类型值
 @param index 索引号
 @result 返回unsigned short，获取失败为0
 */
- (unsigned short)unsignedShortAtIndex:(NSUInteger)index;

/*!
 @method unsignedShortAtIndex:defaultValue:
 @abstract 获取指定index的unsigned short类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回unsigned short，获取失败为指定的defaultValue
 */
- (unsigned short)unsignedShortAtIndex:(NSUInteger)index defaultValue:(unsigned short)defaultValue;

/*!
 @method intAtIndex:
 @abstract 获取指定index的int类型值
 @param index 索引号
 @result 返回int，获取失败为0
 */
- (int)intAtIndex:(NSUInteger)index;

/*!
 @method intAtIndex:defaultValue:
 @abstract 获取指定index的int类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回int，获取失败为指定的defaultValue
 */
- (int)intAtIndex:(NSUInteger)index defaultValue:(int)defaultValue;

/*!
 @method unsignedIntAtIndex:
 @abstract 获取指定index的unsigned int类型值
 @param index 索引号
 @result 返回unsigned int，获取失败为0
 */
- (unsigned int)unsignedIntAtIndex:(NSUInteger)index;

/*!
 @method unsignedIntAtIndex:defaultValue:
 @abstract 获取指定index的unsigned int类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回unsigned int，获取失败为指定的defaultValue
 */
- (unsigned int)unsignedIntAtIndex:(NSUInteger)index defaultValue:(unsigned int)defaultValue;

/*!
 @method longAtIndex:
 @abstract 获取指定index的long类型值
 @param index 索引号
 @result 返回long，获取失败为0
 */
- (long)longAtIndex:(NSUInteger)index;

/*!
 @method longAtIndex:defaultValue:
 @abstract 获取指定index的long类型值
 @param defaultValue 获取失败要返回的值
 @result 返回long，获取失败为指定的defaultValue
 */
- (long)longAtIndex:(NSUInteger)index defaultValue:(long)defaultValue;

/*!
 @method unsignedLongAtIndex:
 @abstract 获取指定index的unsigned long类型值
 @param index 索引号
 @result 返回unsigned long，获取失败为0
 */
- (unsigned long)unsignedLongAtIndex:(NSUInteger)index;

/*!
 @method unsignedLongAtIndex:defaultValue:
 @abstract 获取指定index的unsigned long类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回unsigned long，获取失败为指定的defaultValue
 */
- (unsigned long)unsignedLongAtIndex:(NSUInteger)index defaultValue:(unsigned long)defaultValue;

/*!
 @method longLongAtIndex:
 @abstract 获取指定index的long long类型值
 @param index 索引号
 @result 返回long long，获取失败为0
 */
- (long long)longLongAtIndex:(NSUInteger)index;

/*!
 @method longLongAtIndex:defaultValue:
 @abstract 获取指定index的long long类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回long long，获取失败为指定的defaultValue
 */
- (long long)longLongAtIndex:(NSUInteger)index defaultValue:(long long)defaultValue;

/*!
 @method unsignedLongLongAtIndex:
 @abstract 获取指定index的unsigned long long类型值
 @param index 索引号
 @result 返回unsigned long long，获取失败为0
 */
- (unsigned long long)unsignedLongLongAtIndex:(NSUInteger)index;

/*!
 @method unsignedLongLongAtIndex:defaultValue:
 @abstract 获取指定index的unsigned long long类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回unsigned long long，获取失败为指定的defaultValue
 */
- (unsigned long long)unsignedLongLongAtIndex:(NSUInteger)index defaultValue:(unsigned long long)defaultValue;

/*!
 @method floatAtIndex:
 @abstract 获取指定index的float类型值
 @param index 索引号
 @result 返回float，获取失败为0.0
 */
- (float)floatAtIndex:(NSUInteger)index;

/*!
 @method floatAtIndex:defaultValue:
 @abstract 获取指定index的float类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回float，获取失败为指定的defaultValue
 */
- (float)floatAtIndex:(NSUInteger)index defaultValue:(float)defaultValue;

/*!
 @method doubleAtIndex:
 @abstract 获取指定index的double类型值
 @param index 索引号
 @result 返回double，获取失败为0.0
 */
- (double)doubleAtIndex:(NSUInteger)index;

/*!
 @method doubleAtIndex:defaultValue:
 @abstract 获取指定index的double类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回double，获取失败为指定的defaultValue
 */
- (double)doubleAtIndex:(NSUInteger)index defaultValue:(double)defaultValue;

/*!
 @method boolAtIndex:
 @abstract 获取指定index的BOOL类型值
 @param index 索引号
 @result 返回BOOL，获取失败为NO
 */
- (BOOL)boolAtIndex:(NSUInteger)index;

/*!
 @method boolAtIndex:
 @abstract 获取指定index的BOOL类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回BOOL，获取失败为指定的defaultValue
 */
- (BOOL)boolAtIndex:(NSUInteger)index defaultValue:(BOOL)defaultValue;

/*!
 @method integerAtIndex:
 @abstract 获取指定index的NSInteger类型值
 @param index 索引号
 @result 返回NSInteger，获取失败为0
 */
- (NSInteger)integerAtIndex:(NSUInteger)index;

/*!
 @method integerAtIndex:defaultValue:
 @abstract 获取指定index的NSInteger类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回NSInteger，获取失败为指定的defaultValue
 */
- (NSInteger)integerAtIndex:(NSUInteger)index defaultValue:(NSInteger)defaultValue;

/*!
 @method unsignedIntegerAtIndex:
 @abstract 获取指定index的NSUInteger类型值
 @param index 索引号
 @result 返回NSUInteger，获取失败为0
 */
- (NSUInteger)unsignedIntegerAtIndex:(NSUInteger)index;

/*!
 @method unsignedIntegerAtIndex:defaultValue:
 @abstract 获取指定index的NSUInteger类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回NSUInteger，获取失败为指定的defaultValue
 */
- (NSUInteger)unsignedIntegerAtIndex:(NSUInteger)index defaultValue:(NSUInteger)defaultValue;

/*!
 @method pointAtIndex:
 @abstract 获取指定index的CGPoint类型值
 @param index 索引号
 @result 返回CGPoint，获取失败为CGPointZero
 */
- (CGPoint)pointAtIndex:(NSUInteger)index;

/*!
 @method pointAtIndex:defaultValue:
 @abstract 获取指定index的CGPoint类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回CGPoint，获取失败为指定的defaultValue
 */
- (CGPoint)pointAtIndex:(NSUInteger)index defaultValue:(CGPoint)defaultValue;

/*!
 @method sizeAtIndex:
 @abstract 获取指定index的CGSize类型值
 @param index 索引号
 @result 返回CGPoint，获取失败为CGSizeZero
 */
- (CGSize)sizeAtIndex:(NSUInteger)index;

/*!
 @method sizeAtIndex:defaultValue:
 @abstract 获取指定index的CGSize类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回CGSize，获取失败为指定的defaultValue
 */
- (CGSize)sizeAtIndex:(NSUInteger)index defaultValue:(CGSize)defaultValue;

/*!
 @method rectAtIndex:
 @abstract 获取指定index的CGRect类型值
 @param index 索引号
 @result 返回CGPoint，获取失败为CGRectZero
 */
- (CGRect)rectAtIndex:(NSUInteger)index;

/*!
 @method rectAtIndex:
 @abstract 获取指定index的CGRect类型值
 @param index 索引号
 @param defaultValue 获取失败要返回的值
 @result 返回CGRect，获取失败为指定的defaultValue
 */
- (CGRect)rectAtIndex:(NSUInteger)index defaultValue:(CGRect)defaultValue;

@end


@implementation NSArray (SHYUtil)

- (id)anyObject
{
    return [self count] > 0 ? [self objectAtIndexCheck:0] : nil;
}

- (BOOL)isEmpty
{
    return ([self count] == 0);
}

- (id)objectAtIndexCheck:(NSUInteger)index
{
    if (index >= [self count]) {
        return nil;
    }
    
    id value = [self objectAtIndex:index];
    if (value == [NSNull null]) {
        return nil;
    }
    return value;
}

- (id)objectAtIndexCheck:(NSUInteger)index class:(__unsafe_unretained Class)aClass
{
    return [self objectAtIndexCheck:index class:aClass defaultValue:nil];
}

- (id)objectAtIndexCheck:(NSUInteger)index class:(__unsafe_unretained Class)aClass defaultValue:(id)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if (![value isKindOfClass:aClass]) {
        return defaultValue;
    }
    return value;
}

- (NSArray *)arrayAtIndex:(NSUInteger)index
{
    return [self arrayAtIndex:index defaultValue:nil];
}

- (NSArray *)arrayAtIndex:(NSUInteger)index defaultValue:(NSArray *)defaultValue
{
    return [self objectAtIndexCheck:index class:[NSArray class] defaultValue:defaultValue];
}

- (NSMutableArray *)mutableArrayAtIndex:(NSUInteger)index
{
    return [self mutableArrayAtIndex:index defaultValue:nil];
}

- (NSMutableArray *)mutableArrayAtIndex:(NSUInteger)index defaultValue:(NSArray *)defaultValue
{
    return [self objectAtIndexCheck:index class:[NSMutableArray class] defaultValue:defaultValue];
}

- (NSDictionary *)dictionaryAtIndex:(NSUInteger)index
{
    return [self dictionaryAtIndex:index defaultValue:nil];
}

- (NSDictionary *)dictionaryAtIndex:(NSUInteger)index defaultValue:(NSDictionary *)defaultValue
{
    return [self objectAtIndexCheck:index class:[NSDictionary class] defaultValue:defaultValue];
}

- (NSMutableDictionary *)mutableDictionaryAtIndex:(NSUInteger)index
{
    return [self mutableDictionaryAtIndex:index defaultValue:nil];
}

- (NSMutableDictionary *)mutableDictionaryAtIndex:(NSUInteger)index defaultValue:(NSDictionary *)defaultValue
{
    return [self objectAtIndexCheck:index class:[NSMutableDictionary class] defaultValue:defaultValue];
}

- (NSData *)dataAtIndex:(NSUInteger)index
{
    return [self dataAtIndex:index defaultValue:nil];
}

- (NSData *)dataAtIndex:(NSUInteger)index defaultValue:(NSData *)defaultValue
{
    return [self objectAtIndexCheck:index class:[NSData class] defaultValue:defaultValue];
}

- (NSString *)stringAtIndex:(NSUInteger)index
{
    return [self stringAtIndex:index defaultValue:nil];
}

- (NSString *)stringAtIndexToString:(NSUInteger)index
{
    return [self stringAtIndex:index defaultValue:@""];
}

- (NSString *)stringAtIndex:(NSUInteger)index defaultValue:(NSString *)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    
    if ([value isKindOfClass:[NSNumber class]]) {
        return [value stringValue];
    }
    
    if (![value isKindOfClass:[NSString class]]) {
        return defaultValue;
    }
    return value;
}

- (NSNumber *)numberAtIndex:(NSUInteger)index
{
    return [self numberAtIndex:index defaultValue:nil];
}

- (NSNumber *)numberAtIndex:(NSUInteger)index defaultValue:(NSNumber *)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSString class]]) {
        return [value numberValue];
    }
    
    if (![value isKindOfClass:[NSNumber class]]) {
        return defaultValue;
    }
    
    return value;
}

- (char)charAtIndex:(NSUInteger)index
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value charValue];
    }
    else {
        return 0x0;
    }
}

- (unsigned char)unsignedCharAtIndex:(NSUInteger)index
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedCharValue];
    }
    else {
        return 0x0;
    }
}

- (short)shortAtIndex:(NSUInteger)index
{
    return [self shortAtIndex:index defaultValue:0];
}

- (short)shortAtIndex:(NSUInteger)index defaultValue:(short)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value shortValue];
    }
    else {
        return defaultValue;
    }
}

- (unsigned short)unsignedShortAtIndex:(NSUInteger)index
{
    return [self unsignedShortAtIndex:index defaultValue:0];
}

- (unsigned short)unsignedShortAtIndex:(NSUInteger)index defaultValue:(unsigned short)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedShortValue];
    }
    else {
        return defaultValue;
    }
}

- (int)intAtIndex:(NSUInteger)index
{
    return [self intAtIndex:index defaultValue:0];
}

- (int)intAtIndex:(NSUInteger)index defaultValue:(int)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value intValue];
    }
    else {
        return defaultValue;
    }
}

- (unsigned int)unsignedIntAtIndex:(NSUInteger)index
{
    return [self unsignedIntAtIndex:index defaultValue:0];
}

- (unsigned int)unsignedIntAtIndex:(NSUInteger)index defaultValue:(unsigned int)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedIntValue];
    }
    else {
        return defaultValue;
    }
}

- (long)longAtIndex:(NSUInteger)index
{
    return [self longAtIndex:index defaultValue:0];
}

- (long)longAtIndex:(NSUInteger)index defaultValue:(long)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value longValue];
    }
    else {
        return defaultValue;
    }
}

- (unsigned long)unsignedLongAtIndex:(NSUInteger)index
{
    return [self unsignedLongAtIndex:index defaultValue:0];
}

- (unsigned long)unsignedLongAtIndex:(NSUInteger)index defaultValue:(unsigned long)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedLongValue];
    }
    else {
        return defaultValue;
    }
}

- (long long)longLongAtIndex:(NSUInteger)index
{
    return [self longLongAtIndex:index defaultValue:0];
}

- (long long)longLongAtIndex:(NSUInteger)index defaultValue:(long long)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value longLongValue];
    }
    else {
        return defaultValue;
    }
}

- (unsigned long long)unsignedLongLongAtIndex:(NSUInteger)index
{
    return [self unsignedLongLongAtIndex:index defaultValue:0];
}

- (unsigned long long)unsignedLongLongAtIndex:(NSUInteger)index defaultValue:(unsigned long long)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedLongLongValue];
    }
    else {
        return defaultValue;
    }
}

- (float)floatAtIndex:(NSUInteger)index
{
    return [self floatAtIndex:index defaultValue:0.0];
}

- (float)floatAtIndex:(NSUInteger)index defaultValue:(float)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        float result = [value floatValue];
        return isnan(result) ? defaultValue : result;
    }
    else {
        return defaultValue;
    }
}

- (double)doubleAtIndex:(NSUInteger)index
{
    return [self doubleAtIndex:index defaultValue:0.0];
}

- (double)doubleAtIndex:(NSUInteger)index defaultValue:(double)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        double result = [value doubleValue];
        return isnan(result) ? defaultValue : result;
    }
    else {
        return defaultValue;
    }
}

- (BOOL)boolAtIndex:(NSUInteger)index
{
    return [self boolAtIndex:index defaultValue:NO];
}

- (BOOL)boolAtIndex:(NSUInteger)index defaultValue:(BOOL)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value boolValue];
    }
    else {
        return defaultValue;
    }
}

- (NSInteger)integerAtIndex:(NSUInteger)index
{
    return [self integerAtIndex:index defaultValue:0];
}

- (NSInteger)integerAtIndex:(NSUInteger)index defaultValue:(NSInteger)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value integerValue];
    }
    else {
        return defaultValue;
    }
}

- (NSUInteger)unsignedIntegerAtIndex:(NSUInteger)index
{
    return [self unsignedIntegerAtIndex:index defaultValue:0];
}

- (NSUInteger)unsignedIntegerAtIndex:(NSUInteger)index defaultValue:(NSUInteger)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedIntegerValue];
    }
    else {
        return defaultValue;
    }
}

- (CGPoint)pointAtIndex:(NSUInteger)index
{
    return [self pointAtIndex:index defaultValue:CGPointZero];
}

- (CGPoint)pointAtIndex:(NSUInteger)index defaultValue:(CGPoint)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSString class]] && ![value isEmpty])
        return CGPointFromString(value);
    else if ([value isKindOfClass:[NSValue class]])
        return [value CGPointValue];
    else
        return defaultValue;
}

- (CGSize)sizeAtIndex:(NSUInteger)index
{
    return [self sizeAtIndex:index defaultValue:CGSizeZero];
}

- (CGSize)sizeAtIndex:(NSUInteger)index defaultValue:(CGSize)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSString class]] && ![value isEmpty])
        return CGSizeFromString(value);
    else if ([value isKindOfClass:[NSValue class]])
        return [value CGSizeValue];
    else
        return defaultValue;
}

- (CGRect)rectAtIndex:(NSUInteger)index
{
    return [self rectAtIndex:index defaultValue:CGRectZero];
}

- (CGRect)rectAtIndex:(NSUInteger)index defaultValue:(CGRect)defaultValue
{
    id value = [self objectAtIndexCheck:index];
    if ([value isKindOfClass:[NSString class]] && ![value isEmpty])
        return CGRectFromString(value);
    else if ([value isKindOfClass:[NSValue class]])
        return [value CGRectValue];
    else
        return defaultValue;
}

@end

NSDictionary的扩展

@interface NSDictionary (SHYUtil)

/*!
 @method dictionaryWithContentsOfData:
 @abstract 把NSData数据转成NSDictionary
 @result 返回NSDictionary
 */
+ (NSDictionary *)dictionaryWithContentsOfData:(NSData *)data;

/*!
 @method isEmpty
 @abstract 是否空,字典里没有对象也是为YES；
 @result 返回bool
 */
- (BOOL)isEmpty;

/*!
 @method objectForKeyCheck
 @abstract 检查是否aKey为nil 和 NSNull null如果是返回nil
 @result 返回对象
 */
- (id)objectForKeyCheck:(id)aKey;

/*!
 @method objectForKeyCheck:class:
 @abstract 获取指定key的对象
 @param key 键
 @param aClass 检查类型
 @result 返回对象
 */
- (id)objectForKeyCheck:(id)key class:(__unsafe_unretained Class)aClass;

/*!
 @method objectForKeyCheck:class:defaultValue:
 @abstract 获取指定key的对象
 @param key 键
 @param aClass 检查类型
 @param defaultValue 获取失败要返回的值
 @result 返回对象，获取失败为指定的defaultValue
 */
- (id)objectForKeyCheck:(id)key class:(__unsafe_unretained Class)aClass defaultValue:(id)defaultValue;

/*!
 @method arrayForKey:
 @abstract 获取指定key的NSArray类型值
 @param key 键
 @result 返回NSArray，获取失败为nil
 */
- (NSArray *)arrayForKey:(id)key;

/*!
 @method arrayForKey:defaultValue:
 @abstract 获取指定key的NSArray类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回NSArray，获取失败为指定的defaultValue
 */
- (NSArray *)arrayForKey:(id)key defaultValue:(NSArray *)defaultValue;

/*!
 @method mutableArrayForKey:
 @abstract 获取指定key的NSMutableArray类型值
 @param key 键
 @result 返回NSMutableArray，获取失败为nil
 */
- (NSMutableArray *)mutableArrayForKey:(id)key;

/*!
 @method mutableArrayForKey:defaultValue:
 @abstract 获取指定key的NSMutableArray类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回NSMutableArray，获取失败为指定的defaultValue
 */
- (NSMutableArray *)mutableArrayForKey:(id)key defaultValue:(NSArray *)defaultValue;

/*!
 @method dictionaryForKey:
 @abstract 获取指定key的NSDictionary类型值
 @param key 键
 @result 返回NSDictionary，获取失败为nil
 */
- (NSDictionary *)dictionaryForKey:(id)key;

/*!
 @method dictionaryForKey:defaultValue:
 @abstract 获取指定key的NSDictionary类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回NSDictionary，获取失败为指定的defaultValue
 */
- (NSDictionary *)dictionaryForKey:(id)key defaultValue:(NSDictionary *)defaultValue;

/*!
 @method mutableDictionaryForKey:
 @abstract 获取指定key的NSMutableDictionary类型值
 @param key 键
 @result 返回NSMutableDictionary，获取失败为nil
 */
- (NSMutableDictionary *)mutableDictionaryForKey:(id)key;

/*!
 @method mutableDictionaryForKey:defaultValue:
 @abstract 获取指定key的NSMutableDictionary类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回NSMutableDictionary，获取失败为指定的defaultValue
 */
- (NSMutableDictionary *)mutableDictionaryForKey:(id)key defaultValue:(NSDictionary *)defaultValue;

/*!
 @method dataForKey:
 @abstract 获取指定key的NSData类型值
 @param key 键
 @result 返回NSData，获取失败为nil
 */
- (NSData *)dataForKey:(id)key;

/*!
 @method dataForKey:defaultValue:
 @abstract 获取指定key的NSData类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回NSData，获取失败为指定的defaultValue
 */
- (NSData *)dataForKey:(id)key defaultValue:(NSData *)defaultValue;

/*!
 @method stringForKey:
 @abstract 获取指定key的NSString类型值
 @param key 键
 @result 返回NSString，获取失败为nil
 */
- (NSString *)stringForKey:(id)key;

/*!
 @method stringForKeyToString:
 @abstract 获取指定key的NSString类型值
 @param key 键
 @result 返回字NSString，获取失败为@""
 */
- (NSString *)stringForKeyToString:(id)key;

/*!
 @method stringForKey:defaultValue:
 @abstract 获取指定key的NSString类型值,获取失败返回为指定的defaultValue
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回NSString，获取失败为指定的defaultValue
 */
- (NSString *)stringForKey:(id)key defaultValue:(NSString *)defaultValue;

/*!
 @method numberForKey:
 @abstract 获取指定key的NSNumber类型值
 @param key 键
 @result 返回NSNumber，获取失败为nil
 */
- (NSNumber *)numberForKey:(id)key;

/*!
 @method numberForKey:defaultValue:
 @abstract 获取指定key的NSNumber类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回NSNumber，获取失败为指定的defaultValue
 */
- (NSNumber *)numberForKey:(id)key defaultValue:(NSNumber *)defaultValue;

/*!
 @method charForKey:
 @abstract 获取指定key的NSNumber类型值
 @param key 键
 @result 返回char
 */
- (char)charForKey:(id)key;

/*!
 @method unsignedCharForKey:
 @abstract 获取指定key的unsigned char类型值
 @param key 键
 @result 返回unsigned char
 */
- (unsigned char)unsignedCharForKey:(id)key;

/*!
 @method shortForKey:
 @abstract 获取指定key的short类型值
 @param key 键
 @result 返回short，获取失败为0
 */
- (short)shortForKey:(id)key;

/*!
 @method shortForKey:defaultValue:
 @abstract 获取指定key的short类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回short，获取失败为指定的defaultValue
 */
- (short)shortForKey:(id)key defaultValue:(short)defaultValue;

/*!
 @method unsignedShortForKey:
 @abstract 获取指定key的unsigned short类型值
 @param key 键
 @result 返回unsigned short，获取失败为0
 */
- (unsigned short)unsignedShortForKey:(id)key;

/*!
 @method unsignedShortForKey:defaultValue:
 @abstract 获取指定key的unsigned short类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回unsigned short，获取失败为指定的defaultValue
 */
- (unsigned short)unsignedShortForKey:(id)key defaultValue:(unsigned short)defaultValue;

/*!
 @method intForKey:
 @abstract 获取指定key的int类型值
 @param key 键
 @result 返回int，获取失败为0
 */
- (int)intForKey:(id)key;

/*!
 @method intForKey:defaultValue:
 @abstract 获取指定key的int类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回int，获取失败为指定的defaultValue
 */
- (int)intForKey:(id)key defaultValue:(int)defaultValue;

/*!
 @method unsignedIntForKey:
 @abstract 获取指定key的unsigned int类型值
 @param key 键
 @result 返回unsigned int，获取失败为0
 */
- (unsigned int)unsignedIntForKey:(id)key;

/*!
 @method unsignedIntForKey:defaultValue:
 @abstract 获取指定key的unsigned int类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回unsigned int，获取失败为指定的defaultValue
 */
- (unsigned int)unsignedIntForKey:(id)key defaultValue:(unsigned int)defaultValue;

/*!
 @method longForKey:
 @abstract 获取指定key的long类型值
 @param key 键
 @result 返回long，获取失败为0
 */
- (long)longForKey:(id)key;

/*!
 @method longForKey:defaultValue:
 @abstract 获取指定key的long类型值
 @param defaultValue 获取失败要返回的值
 @result 返回long，获取失败为指定的defaultValue
 */
- (long)longForKey:(id)key defaultValue:(long)defaultValue;

/*!
 @method unsignedLongForKey:
 @abstract 获取指定key的unsigned long类型值
 @param key 键
 @result 返回unsigned long，获取失败为0
 */
- (unsigned long)unsignedLongForKey:(id)key;

/*!
 @method unsignedLongForKey:defaultValue:
 @abstract 获取指定key的unsigned long类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回unsigned long，获取失败为指定的defaultValue
 */
- (unsigned long)unsignedLongForKey:(id)key defaultValue:(unsigned long)defaultValue;

/*!
 @method longLongForKey:
 @abstract 获取指定key的long long类型值
 @param key 键
 @result 返回long long，获取失败为0
 */
- (long long)longLongForKey:(id)key;

/*!
 @method longLongForKey:defaultValue:
 @abstract 获取指定key的long long类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回long long，获取失败为指定的defaultValue
 */
- (long long)longLongForKey:(id)key defaultValue:(long long)defaultValue;

/*!
 @method unsignedLongLongForKey:
 @abstract 获取指定key的unsigned long long类型值
 @param key 键
 @result 返回unsigned long long，获取失败为0
 */
- (unsigned long long)unsignedLongLongForKey:(id)key;

/*!
 @method unsignedLongLongForKey:defaultValue:
 @abstract 获取指定key的unsigned long long类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回unsigned long long，获取失败为指定的defaultValue
 */
- (unsigned long long)unsignedLongLongForKey:(id)key defaultValue:(unsigned long long)defaultValue;

/*!
 @method floatForKey:
 @abstract 获取指定key的float类型值
 @param key 键
 @result 返回float，获取失败为0.0
 */
- (float)floatForKey:(id)key;

/*!
 @method floatForKey:defaultValue:
 @abstract 获取指定key的float类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回float，获取失败为指定的defaultValue
 */
- (float)floatForKey:(id)key defaultValue:(float)defaultValue;

/*!
 @method doubleForKey:
 @abstract 获取指定key的double类型值
 @param key 键
 @result 返回double，获取失败为0.0
 */
- (double)doubleForKey:(id)key;

/*!
 @method doubleForKey:defaultValue:
 @abstract 获取指定key的double类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回double，获取失败为指定的defaultValue
 */
- (double)doubleForKey:(id)key defaultValue:(double)defaultValue;

/*!
 @method boolForKey:
 @abstract 获取指定key的BOOL类型值
 @param key 键
 @result 返回BOOL，获取失败为NO
 */
- (BOOL)boolForKey:(id)key;

/*!
 @method boolForKey:
 @abstract 获取指定key的BOOL类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回BOOL，获取失败为指定的defaultValue
 */
- (BOOL)boolForKey:(id)key defaultValue:(BOOL)defaultValue;

/*!
 @method integerForKey:
 @abstract 获取指定key的NSInteger类型值
 @param key 键
 @result 返回NSInteger，获取失败为0
 */
- (NSInteger)integerForKey:(id)key;

/*!
 @method integerForKey:defaultValue:
 @abstract 获取指定key的NSInteger类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回NSInteger，获取失败为指定的defaultValue
 */
- (NSInteger)integerForKey:(id)key defaultValue:(NSInteger)defaultValue;

/*!
 @method unsignedIntegerForKey:
 @abstract 获取指定key的NSUInteger类型值
 @param key 键
 @result 返回NSUInteger，获取失败为0
 */
- (NSUInteger)unsignedIntegerForKey:(id)key;

/*!
 @method unsignedIntegerForKey:defaultValue:
 @abstract 获取指定key的NSUInteger类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回NSUInteger，获取失败为指定的defaultValue
 */
- (NSUInteger)unsignedIntegerForKey:(id)key defaultValue:(NSUInteger)defaultValue;

/*!
 @method pointForKey:
 @abstract 获取指定key的CGPoint类型值
 @param key 键
 @result 返回CGPoint，获取失败为CGPointZero
 */
- (CGPoint)pointForKey:(id)key;

/*!
 @method pointForKey:defaultValue:
 @abstract 获取指定key的CGPoint类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回CGPoint，获取失败为指定的defaultValue
 */
- (CGPoint)pointForKey:(id)key defaultValue:(CGPoint)defaultValue;

/*!
 @method sizeForKey:
 @abstract 获取指定key的CGSize类型值
 @param key 键
 @result 返回CGPoint，获取失败为CGSizeZero
 */
- (CGSize)sizeForKey:(id)key;

/*!
 @method sizeForKey:defaultValue:
 @abstract 获取指定key的CGSize类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回CGSize，获取失败为指定的defaultValue
 */
- (CGSize)sizeForKey:(id)key defaultValue:(CGSize)defaultValue;

/*!
 @method rectForKey:
 @abstract 获取指定key的CGRect类型值
 @param key 键
 @result 返回CGPoint，获取失败为CGRectZero
 */
- (CGRect)rectForKey:(id)key;

/*!
 @method rectForKey:
 @abstract 获取指定key的CGRect类型值
 @param key 键
 @param defaultValue 获取失败要返回的值
 @result 返回CGRect，获取失败为指定的defaultValue
 */
- (CGRect)rectForKey:(id)key defaultValue:(CGRect)defaultValue;

@end



@implementation NSDictionary (SHYUtil)

+ (NSDictionary *)dictionaryWithContentsOfData:(NSData *)data
{
    CFPropertyListRef plist =  CFPropertyListCreateFromXMLData(kCFAllocatorDefault, (__bridge CFDataRef)data, kCFPropertyListImmutable, NULL);
    NSDictionary *result = (__bridge_transfer NSDictionary *)plist;
    if ([result isKindOfClass:[NSDictionary class]]) {
        return result;
    }
    else {
        CFRelease(plist);
        return nil;
    }
}

- (BOOL)isEmpty
{
    return ([self count] == 0);
}

- (id)objectForKeyCheck:(id)aKey
{
    if (aKey == nil) {
        return nil;
    }
    
    id value = [self objectForKey:aKey];
    if (value == [NSNull null]) {
        return nil;
    }
    return value;
}

- (id)objectForKeyCheck:(id)key class:(__unsafe_unretained Class)aClass
{
    return [self objectForKeyCheck:key class:aClass defaultValue:nil];
}

- (id)objectForKeyCheck:(id)key class:(__unsafe_unretained Class)aClass defaultValue:(id)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if (![value isKindOfClass:aClass]) {
        return defaultValue;
    }
    return value;
}

- (NSArray *)arrayForKey:(id)key
{
    return [self arrayForKey:key defaultValue:nil];
}

- (NSArray *)arrayForKey:(id)key defaultValue:(NSArray *)defaultValue
{
    return [self objectForKeyCheck:key class:[NSArray class] defaultValue:defaultValue];
}

- (NSMutableArray *)mutableArrayForKey:(id)key
{
    return [self mutableArrayForKey:key defaultValue:nil];
}

- (NSMutableArray *)mutableArrayForKey:(id)key defaultValue:(NSArray *)defaultValue
{
    return [self objectForKeyCheck:key class:[NSMutableArray class] defaultValue:defaultValue];
}

- (NSDictionary *)dictionaryForKey:(id)key
{
    return [self dictionaryForKey:key defaultValue:nil];
}

- (NSDictionary *)dictionaryForKey:(id)key defaultValue:(NSDictionary *)defaultValue
{
    return [self objectForKeyCheck:key class:[NSDictionary class] defaultValue:defaultValue];
}

- (NSMutableDictionary *)mutableDictionaryForKey:(id)key
{
    return [self mutableDictionaryForKey:key defaultValue:nil];
}

- (NSMutableDictionary *)mutableDictionaryForKey:(id)key defaultValue:(NSDictionary *)defaultValue
{
    return [self objectForKeyCheck:key class:[NSMutableDictionary class] defaultValue:defaultValue];
}

- (NSData *)dataForKey:(id)key
{
    return [self dataForKey:key defaultValue:nil];
}

- (NSData *)dataForKey:(id)key defaultValue:(NSData *)defaultValue
{
    return [self objectForKeyCheck:key class:[NSData class] defaultValue:defaultValue];
}

- (NSString *)stringForKey:(id)key
{
    return [self stringForKey:key defaultValue:nil];
}

- (NSString *)stringForKeyToString:(id)key
{
    return [self stringForKey:key defaultValue:@""];
}

- (NSString *)stringForKey:(id)key defaultValue:(NSString *)defaultValue
{
    id value = [self objectForKeyCheck:key];
    
    if ([value isKindOfClass:[NSNumber class]]) {
        return [value stringValue];
    }
    
    if (![value isKindOfClass:[NSString class]]) {
        return defaultValue;
    }
    return value;
}

- (NSNumber *)numberForKey:(id)key
{
    return [self numberForKey:key defaultValue:nil];
}

- (NSNumber *)numberForKey:(id)key defaultValue:(NSNumber *)defaultValue
{
    id value = [self objectForKeyCheck:key];
    
    if ([value isKindOfClass:[NSString class]]) {
        return [value numberValue];
    }
    
    if (![value isKindOfClass:[NSNumber class]]) {
        return defaultValue;
    }
    
    return value;
}

- (char)charForKey:(id)key
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value charValue];
    }
    else {
        return 0x0;
    }
}

- (unsigned char)unsignedCharForKey:(id)key
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedCharValue];
    }
    else {
        return 0x0;
    }
}

- (short)shortForKey:(id)key
{
    return [self shortForKey:key defaultValue:0];
}

- (short)shortForKey:(id)key defaultValue:(short)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value shortValue];
    }
    else {
        return defaultValue;
    }
}

- (unsigned short)unsignedShortForKey:(id)key
{
    return [self unsignedShortForKey:key defaultValue:0];
}

- (unsigned short)unsignedShortForKey:(id)key defaultValue:(unsigned short)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedShortValue];
    }
    else {
        return defaultValue;
    }
}

- (int)intForKey:(id)key
{
    return [self intForKey:key defaultValue:0];
}

- (int)intForKey:(id)key defaultValue:(int)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value intValue];
    }
    else {
        return defaultValue;
    }
}

- (unsigned int)unsignedIntForKey:(id)key
{
    return [self unsignedIntForKey:key defaultValue:0];
}

- (unsigned int)unsignedIntForKey:(id)key defaultValue:(unsigned int)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedIntValue];
    }
    else {
        return defaultValue;
    }
}

- (long)longForKey:(id)key
{
    return [self longForKey:key defaultValue:0];
}

- (long)longForKey:(id)key defaultValue:(long)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value longValue];
    }
    else {
        return defaultValue;
    }
}

- (unsigned long)unsignedLongForKey:(id)key
{
    return [self unsignedLongForKey:key defaultValue:0];
}

- (unsigned long)unsignedLongForKey:(id)key defaultValue:(unsigned long)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedLongValue];
    }
    else {
        return defaultValue;
    }
}

- (long long)longLongForKey:(id)key
{
    return [self longLongForKey:key defaultValue:0];
}

- (long long)longLongForKey:(id)key defaultValue:(long long)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value longLongValue];
    }
    else {
        return defaultValue;
    }
}

- (unsigned long long)unsignedLongLongForKey:(id)key
{
    return [self unsignedLongLongForKey:key defaultValue:0];
}

- (unsigned long long)unsignedLongLongForKey:(id)key defaultValue:(unsigned long long)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedLongLongValue];
    }
    else {
        return defaultValue;
    }
}

- (float)floatForKey:(id)key
{
    return [self floatForKey:key defaultValue:0.0];
}

- (float)floatForKey:(id)key defaultValue:(float)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        float result = [value floatValue];
        return isnan(result) ? defaultValue : result;
    }
    else {
        return defaultValue;
    }
}

- (double)doubleForKey:(id)key
{
    return [self doubleForKey:key defaultValue:0.0];
}

- (double)doubleForKey:(id)key defaultValue:(double)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        double result = [value doubleValue];
        return isnan(result) ? defaultValue : result;
    }
    else {
        return defaultValue;
    }
}

- (BOOL)boolForKey:(id)key
{
    return [self boolForKey:key defaultValue:NO];
}

- (BOOL)boolForKey:(id)key defaultValue:(BOOL)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value boolValue];
    }
    else {
        return defaultValue;
    }
}

- (NSInteger)integerForKey:(id)key
{
    return [self integerForKey:key defaultValue:0];
}

- (NSInteger)integerForKey:(id)key defaultValue:(NSInteger)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value integerValue];
    }
    else {
        return defaultValue;
    }
}

- (NSUInteger)unsignedIntegerForKey:(id)key
{
    return [self unsignedIntegerForKey:key defaultValue:0];
}

- (NSUInteger)unsignedIntegerForKey:(id)key defaultValue:(NSUInteger)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSString class]]) {
        return [value unsignedIntegerValue];
    }
    else {
        return defaultValue;
    }
}

- (CGPoint)pointForKey:(id)key
{
    return [self pointForKey:key defaultValue:CGPointZero];
}

- (CGPoint)pointForKey:(id)key defaultValue:(CGPoint)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSString class]] && ![value isEmpty])
        return CGPointFromString(value);
    else if ([value isKindOfClass:[NSValue class]])
        return [value CGPointValue];
    else
        return defaultValue;
}

- (CGSize)sizeForKey:(id)key
{
    return [self sizeForKey:key defaultValue:CGSizeZero];
}

- (CGSize)sizeForKey:(id)key defaultValue:(CGSize)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSString class]] && ![value isEmpty])
        return CGSizeFromString(value);
    else if ([value isKindOfClass:[NSValue class]])
        return [value CGSizeValue];
    else
        return defaultValue;
}

- (CGRect)rectForKey:(id)key
{
    return [self rectForKey:key defaultValue:CGRectZero];
}

- (CGRect)rectForKey:(id)key defaultValue:(CGRect)defaultValue
{
    id value = [self objectForKeyCheck:key];
    if ([value isKindOfClass:[NSString class]] && ![value isEmpty])
        return CGRectFromString(value);
    else if ([value isKindOfClass:[NSValue class]])
        return [value CGRectValue];
    else
        return defaultValue;
}

@end

网络接口协议 JSON 解析 Crash 的哪些事

原文：http://blog.csdn.net/jxncwzb/article/details/43982681