首页 > 其他 > 详细

NSDictionary,NSMutableDictionary 使用

时间:2015-08-15 18:01:06      阅读:220      评论:0      收藏:0      [点我收藏+]

NSDictionary

 

key --->value
索引 --->内容
存储键值对

 

(1)三种创建方式:

NSDictionary *dict = [NSDictionary dictionaryWithObject:@"Jony" forKey:@"name"];

  

NSArray *keys = @[@"name", @"location"];
NSArray *objects = @[@"Jony", @"China"];
NSDictionary *dict = [NSDictionary dictionaryWithObject:objects forKey:keys];

 

NSDictionary *dict = @{@"name" : @"Jony", @"location", @"China"};

 

(2)调用

id obj = [dict objectForKey:@"name"];

id obj = dict[@"name"];

  

NSMutableDictionary

NSMutableDictionary *dict = [NSMutableDictionary dictionary];

[dict setObject:@"Jony" forKey:@"name"];

//deleate
[dict removeObjectForKey:(id)];

NSMutableDictionary *dict = @{@"name" : @"Jony", @"location", @"China"};

  

(1)字典遍历方式

NSArray *keys = [dict allKeys];

for (int i = 0; i < dict.count; i++)
{	
NSString *key = keys[i];
NSString *object = dict[key];

NSLog(@"%@ = %@", key, object);
}

  

[dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop)]
{
NSLog(@"%@ -- %@", key, obj);

//Only oneTime
*stop = YES;
}

  

   

NSDictionary,NSMutableDictionary 使用

原文:http://www.cnblogs.com/fangchun/p/4732686.html

(0)
(0)
   
举报
评论 一句话评论(0
关于我们 - 联系我们 - 留言反馈 - 联系我们:wmxa8@hotmail.com
© 2014 bubuko.com 版权所有
打开技术之扣,分享程序人生!