JSONString 与 JSONData 与字典或者数组互相转化

//
//  YXJSON.h
//
//  JSONString 与 JSONData 与 字典或者数组互相转化
//
//  Copyright (c) 2014年 YouXian. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface YXJSON : NSObject

/**
 将字典或者数组转换为JSON格式字符串
 
 @return JSON格式字符串
 */
+ (NSString *)JSONStringWithDictionaryOrArray:(id)dictionaryOrArray;

/**
 将字典或者数组转换为JSON的Data
 
 @return JSON的Data
 */
+ (NSData *)JSONSDataWithDictionaryOrArray:(id)dictionaryOrArray;

/**
 将JSON格式字符串转换为字典或者数组
 
 @return 字典或者数组
 */
+ (id)dictionaryOrArrayWithJSONSString:(NSString *)jsonString;

/**
 将JSON的Data转换为字典或者数组
 
 @return 字典或者数组
 */
+ (id)dictionaryOrArrayWithJSONSData:(NSData *)jsonData;

@end

//
//  YXJSON.m
//
//  JSONString 与 JSONData 与 字典或者数组互相转化
//
//  Copyright (c) 2014年 YouXian. All rights reserved.
//

#if __has_feature(objc_arc)
#define YX_release(obj)
#define YX_autorelease(obj)
#else
#define YX_release(obj)      [obj release]
#define YX_autorelease(obj)  [obj autorelease]
#endif

#import "YXJSON.h"

@implementation YXJSON

+ (NSString *)JSONStringWithDictionaryOrArray:(id)dictionaryOrArray
{
    if (dictionaryOrArray == nil)
    {
        return nil;
    }
    
    //options: Pass 0 if you don‘t care about the readability of the generated string
    NSData *data = [NSJSONSerialization dataWithJSONObject:dictionaryOrArray
                                                   options:NSJSONWritingPrettyPrinted
                                                     error:nil];
    
    if (data == nil)
    {
        return nil;
    }
    
    NSString *string = [[NSString alloc] initWithData:data
                                             encoding:NSUTF8StringEncoding];
    YX_autorelease(string);
    
    return string;
}

+ (NSData *)JSONSDataWithDictionaryOrArray:(id)dictionaryOrArray
{
    if (dictionaryOrArray == nil)
    {
        return nil;
    }
    
    //options: Pass 0 if you don‘t care about the readability of the generated string
    NSData *data = [NSJSONSerialization dataWithJSONObject:dictionaryOrArray
                                                   options:NSJSONWritingPrettyPrinted
                                                     error:nil];
    return data;
}

+ (id)dictionaryOrArrayWithJSONSString:(NSString *)jsonString
{
    if (jsonString == nil)
    {
        return nil;
    }
    
    NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
    
    return [NSJSONSerialization JSONObjectWithData:jsonData
                                           options:NSJSONReadingMutableLeaves|| NSJSONReadingMutableContainers
                                             error:nil];
}

+ (id)dictionaryOrArrayWithJSONSData:(NSData *)jsonData
{
    if (jsonData == nil)
    {
        return nil;
    }
    
    return [NSJSONSerialization JSONObjectWithData:jsonData
                                           options:NSJSONReadingMutableLeaves|| NSJSONReadingMutableContainers
                                             error:nil];
}

@end