如何从NSDictionary中删除值？

Question

大家好我在nslog返回以下内容时有字典值：

  

NSDictionary * dict = [NSJSONSerialization JSONObjectWithData：data1   选项：0错误：nil];                DLog（@“RESPONSE ======％@”，dict）;

{
    errors =     (
                {
            "@msg" = "already exists";
            "@title" = "title";
        }
    ); }

如何从中提取msg密钥数据？

Answer 1

NSArray *array = dict[@"errors"];
NSDictionary *error1 = array[0];
NSString *msg = error1[@"@msg"];

NSString *msg现在包含already exists。

Answer 2

您可以像这样提取它：

NSString *msg = [myDictionary objectForKey:@"@msg"];

并删除如下：

[myDictionary removeObjectForKey:@"@msg"];

Answer 3

NSDictionary dic2 = [dict objectforKey:@"errors"];
NSString* msg = [dict2 objectForKey:@"@msg"];