如何使用新密钥将数据添加到nsmutable数组中？

我在iphone新development.recently我开始project.after JSON解析我有一个如何使用新密钥将数据添加到nsmutable数组中？

NSmutablearray 
(
    { 
    "contest_description" = " "; 
    "contest_id" = 245; 
    "contest_name" = "teating1 "; 
    "contest_status" = Running; 
    "creator_id" = "1716091396 "; 
    "end_time" = "2012-10-26 04:10:25"; 
    "full_name" = "Adit Hasan "; 
    "no_of_contestants" = 3; 
    "no_of_days" = 5; 
    "start_time" = "2012-10-21 04:10:24"; 
    "time_stamp" = "2012-10-24 04:11:09"; 
    "winner_user_id" = "Not Yet"; 
    }, 
    { 
    "contest_description" = " "; 
    "contest_id" = 248; 
    "contest_name" = "hhhhhhk "; 
    "contest_status" = Running; 
    "creator_id" = "1716091396 "; 
    "end_time" = "2012-10-25 13:33:35"; 
    "full_name" = "Adit Hasan "; 
    "no_of_contestants" = 2; 
    "no_of_days" = 4; 
    "start_time" = "2012-10-21 13:33:34"; 
    "time_stamp" = "2012-10-23 13:35:09"; 
    "winner_user_id" = "Not Yet"; 
    }, 
)

如何添加新的密钥像updated_image和值分配给此项？

来源

2012-10-24 Adit

基本上你有什么是NSDictionary的NSArray，我不知道这是否是Mutable这就是为什么我指的是他们作为正常NS不变类，如果他们是不可变的，你需要将它们转换为Mutable对象。像如下

NSMutableArray *mutableArray = [NSMutableArray arrayWithArray:yourPreviousArray];

NSMutableDictionary *mutableDictionary = [NSMutableDictionary dictionaryWithDictionary:previousDictionary];

任何怎么样，这是我觉得你的问题的解决方案是，正在考虑将现有的阵列（并不重要，如果它不是，只要你没有添加新的字典）和字典是可变的。

for (NSMutableDictionary *dictionary in previousArray) { 
    [dictionary setValue:updated_image forKey:@"updated_image"]; 
}

如果要设置新键updated_image后的值，初始化它作为NULL，后来设置。

你为什么不给下面

NSArray Class Reference

NSMutableArray Class Reference

NSDictionary Class Reference

NSMutableDictionary Class Reference

而且还示例程序有一个良好的阅读。

来源

2012-10-24 04:58:53

如何使用新密钥将数据添加到nsmutable数组中？

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