1 - (IBAction)test:(id)sender { 2     NSString *result = @"{\"code\":\"S00000\",\"message\":\"success\",\"data\":{\"file_name\":\"b1feba4439d0bed9f867123637121b24-dc7764fb24f7294c6a3dcb6971eddb25.png\",\"paths\":[\"x1\",\"x2\",\"x3\",\"x5\",\"x6\",\"x7\",\"x8\",\"xm\"]}}"; 3     NSError *error; 4     NSData* response = [result dataUsingEncoding:NSUTF8StringEncoding]; 5  6     NSDictionary *jsonInfo = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableContainers error:&error]; 7     NSString *code = [jsonInfo objectForKey:@"code"]; 8      9     NSLog([NSString stringWithFormat:@"%@",code]);10     11     NSDictionary *data = http://www.mamicode.com/[jsonInfo objectForKey:@"data"];12     NSLog([NSString stringWithFormat:@"%@",[data objectForKey:@"file_name"]]);13 }