無法使用Firebase在iOS中接收通知

Question

我在測試中使用Firebase控制台在iOS中接收通知。 起初它說我已連接到Firebase並且我收到了消息ID，但后來我遇到了錯誤Warning: Application delegate received call to -application:didReceiveRemoteNotification:fetchCompletionHandler: but the completion handler was never called. 並且Unable to connect to FCM. Error Domain=com.google.fcm Code=2001 "(null)" Unable to connect to FCM. Error Domain=com.google.fcm Code=2001 "(null)"我該如何解決這個問題？

這是我的didReceiveRemoteNotification代碼

// [START receive_message]
 - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
    fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
// If you are receiving a notification message while your app is in the background,
// this callback will not be fired till the user taps on the notification launching the application.
// TODO: Handle data of notification

// Print message ID.
NSLog(@"Message ID: %@", userInfo[@"gcm.message_id"]);

// Pring full message.
NSLog(@"%@", userInfo);
}
// [END receive_message]

Answer 1

嘗試添加：

completionHandler(UIBackgroundFetchResultNoData);

在didReceiveRemoteNotification方法的最后。