requestTrackingAuthorization method

@override Future<String?> requestTrackingAuthorization()

iOS 特有方法：请求广告追踪权限

在iOS 14.5+版本中，需要用户明确授权才能获取IDFA

Implementation

@override
Future<String?> requestTrackingAuthorization() async {
  final result = await methodChannel.invokeMethod<String>(
    'requestTrackingAuthorization',
  );
  return result;
}