ios - 如何获取JSON数据中的第一个对象名称？

Question

我的服务器人员根据消息对象中的不同请求向我发送包含不同对象的 JSON 数据。比如，在一些请求中:

{
            "message": {
                "series": {...}
            },
            "boolean": true
}

在一些请求中:

{
            "message": {
                "movie": {...}
            },
            "boolean": true
}

而且两个对象都有不同的数据。所以，我想在消息对象中获取第一个对象的名称，它是“电影”或“系列”，这样我就可以对其进行 if else 条件以获取内部数据。

    NSString *myRequestString = [NSString stringWithFormat:@"getVideo=1"];
    // Create Data from request
    NSData *myRequestData = [NSData dataWithBytes: [myRequestString UTF8String] length: [myRequestString length]];
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString: url]];
    // set Request Type
    [request setHTTPMethod: @"POST"];
    // Set content-type
    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"];
    // Set Request Body
    [request setHTTPBody: myRequestData];
    // Now send a request and get Response
    NSData *returnData = [NSURLConnection sendSynchronousRequest: request returningResponse: nil error: nil];
    // Log Response
    NSString *response = [[NSString alloc] initWithBytes:[returnData bytes] length:[returnData length] encoding:NSUTF8StringEncoding];
    NSLog(@"Response: %@",response);

    NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:returnData options:NSJSONReadingMutableLeaves error:nil];

//    for(NSDictionary *dict in firstObject){
//        NSLog(@"%@",[dict objectForKey:@"name"]);
//    }

Answer 1

dict = [dict objectForKey:@"message"];
if([dict objectForKey:@"movie"]){
//Your dictionary has key movie, parse accordingly
}
else if ([dict objectForKey:@"series"]){
 //Your dictionary has key series, parse accordingly
}

希望对你有帮助