常用

####------------否包含某個鍵key的方法
NSDictionary *dicss = @{@"name":@"lilei",@"age":@"13"};
    if([[dicss allKeys]containsObject:@"name"]){
        NSLog(@"111111");
    }else{
        NSLog(@"22222");
    }

規(guī)范

  NSDictionary *dict3 = @{@"keyA":@"valueA",
                            @"keyB":@"valueB",
                            @"keyC":@"valueC"};

遍歷

   //快速枚舉
    NSDictionary *dic = @{@"name":@"龍馬",@"age":@"15"};
    for (id key in dic){
        
        id obj = [dic objectForKey:key];
        
        NSLog(@"%@", obj);
        
    }

NSDictionary 總結
http://www.lxweimin.com/p/aa447d1ad33e