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我在测试中使用 Firebase 控制台在我的 iOS 中接收通知。起初它说我已连接到 Firebase 并收到消息 ID，但后来我遇到了错误Warning: Application delegate received call to -application:didReceiveRemoteNotification:fetchCompletionHandler: but the completion handler was never called.，Unable to connect to FCM. Error Domain=com.google.fcm Code=2001 "(null)" 我该如何解决这个问题？

这是我的 didReceiveRemoteNotification 代码

// [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]
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1 回答 1

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尝试添加：

completionHandler(UIBackgroundFetchResultNoData);

在您的 didReceiveRemoteNotification 方法结束时。

于 2016-06-17T15:47:45.053 回答