JSONKit NSDictionary

Question

在JSONkit.h使用NSDictionary存在問題。什麼是正確的方式來使用它？

JSON：

[{"id":"1100","name":"John Stuart"}] 

代碼：

- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{ 
    NSDictionary *jsonData = [responseData objectFromJSONData]; 
    NSString *name = [jsonData objectForKey:@"name"]; 
    NSLog(@"Name: %@", name); 
} 

錯誤：

** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[JKArray objectForKey:]: unrecognized selector sent to instance 0x84b9b30' 

Answer 1

你JSON是一個數組，但你的代碼假定它是一本字典，並試圖調用-objectForKey:上它。您可能想要嘗試以下操作：

- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{ 
    NSArray *jsonData = [responseData objectFromJSONData]; 
    for (NSDictionary *dict in jsonData) { 
     NSString *name = [dict objectForKey:@"name"]; 
     NSLog(@"Name: %@", name); 
    } 
}