解析NSCFString objectForKeyedSubscript错误

你好，我想解析一个JSON，但每次我尝试我失败。我已经尝试过最近使用过的这种方法，并且在除了这个之外的所有其他项目中工作。 json是有效的。解析NSCFString objectForKeyedSubscript错误

NSString *post = [NSString stringWithFormat:@"x=2&y=3&z=1"]; 

    NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; 
    NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]]; 

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; 
    [request setURL:[[NSURL alloc] initWithString:@"link-to-php.php"]]; 
    [request setHTTPMethod:@"POST"]; 
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"]; 
    [request setHTTPBody:postData]; 


    NSURLResponse *requestResponse; 
    NSData *requestHandler = [NSURLConnection sendSynchronousRequest:request returningResponse:&requestResponse error:nil]; 
    NSError *error; 
    NSMutableDictionary *getJsonData = [NSJSONSerialization 
             JSONObjectWithData:requestHandler 
             options:NSJSONReadingMutableContainers 
             error:&error]; 

    if(error) 
    { 
     NSLog(@"%@", [error localizedDescription]); 
    } 
    else { 
     NSArray *json = getJsonData[@"data"]; 



     for (NSDictionary *jsn in json) 
     { 


      NSLog(@"dea %@",jsn[@"content"]); 
     } 





    }

我的JSON的代码是这样

{"status":1,"error_message":null,"data":{"name":"Test","img":"","content":"Continut de test"}}

我得到的错误是在“数据”键

[__NSCFString objectForKeyedSubscript:]: unrecognized selector sent to instance 0x17e7b7c0 
2015-08-03 14:58:50.706 InfoCons[4418:1720073] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString objectForKeyedSubscript:]: unrecognized selector sent to instance 0x17e7b7c0'

来源

2015-08-03 Kevin Alexandru

正是在这行你得到的错误？ –

你在字典中甲数据JSON甲回报字典不阵列甲回报。

试试这个代码得到JSON数据：

if(error) 
    { 
     NSLog(@"%@", [error localizedDescription]); 
    } 
    else { 
     NSLog(@"%@",getJsonData[@"data"][@"content"]); // print value of dictionary 
    }

来源

2015-08-03 12:12:13

解析NSCFString objectForKeyedSubscript错误

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