Question

如何从以下JSON获取值。

JSON

{
    "X": [
        {
            "one": 1,
            "two": "Bill"
        },
        {
            "one": 2,
            "two": "Hutch"
        }
    ]
}

代码

NSDictionary *dictionary = (NSDictionary *) responseObject;


 dc =[dictionary objectForKey:@"X"];

现在我如何打印＆＃34; one＆＃34;和＆＃34;两个＆＃34;

注意：dc是NSMutableDictionary。

Answer 1

使用此代码..

    NSString *str = @"{\"X\":[{\"one\": 1, \"two\": \"Bill\" }, { \"one\": 2, \"two\": \"Hutch\" } ] }";
   str = @"{\"X\":[{\"one\": 1,},{\"one\": 2,\"two\": \"Hutch\"}]}";
    NSError *jsonError;
    NSData *objectData = [str dataUsingEncoding:NSUTF8StringEncoding];
    NSDictionary *json = [NSJSONSerialization JSONObjectWithData:objectData
                                                         options:NSJSONReadingMutableContainers
                                                           error:&jsonError];
    NSLog(@"%@",[json objectForKey:@"X"]);

    NSMutableDictionary *dict = [json objectForKey:@"X"];
    for (NSDictionary *tempDict in dict) {
        NSLog(@"%@",tempDict);
        if ([tempDict objectForKey:@"one"]) {
            NSLog(@"%@",[tempDict objectForKey:@"one"]);
        }
        if ([tempDict objectForKey:@"two"]){
            NSLog(@"%@",[tempDict objectForKey:@"two"]);
        }
    }

希望这可以帮到你:)

Answer 2

看这里是你的JSON

{ ＆＃34; X＆＃34;：[ { ＆＃34;一个＆＃34;：1，＆＃34;两个＆＃34;：＆＃34;比尔＆＃34; }， { ＆＃34;一个＆＃34;：2 ，＆＃34;两个＆＃34;：＆＃34; Hutch＆＃34; } ]}

要从X数组中获取第二个对象，并在＆＃34中获得第二个对象;一个＆＃34; ：

NSString *value = [[[dictionary objectForKey:@"X"] objectAtIndex: 1] objectForKey: @"one"];

以下是单行中使用的相同代码的多行说明：

  NSArray *arr = [dictionary objectForKey:<Root Key String>]; // save data to array from dictionary
  NSDictionary *dict = [arr objectAtIndex: <Index of object>]; // get the actual object from array based on index
  NSString *resultString = [dict objectForKey: <Key String>]; // get value of your required key

使用NSDictionary从JSON字符串中获取值

2 个答案: