Question

我正在为Android和iOS开发一款Flutter应用程序。它具有通知，因此我确实实现了firebase_messaging API。我正在通过设备ID向某些设备发送通知，也向topics发送通知。

我正在测试topics通知发送，在Android中可以100％正常运行。我按照上面提供的链接中的指南进行操作，还实现了iOS设置。但是在iOS中，发送通知时，只有在前台时，应用程序才能接收该通知。这意味着只能通过onMessage。如果该应用程序处于后台或关闭状态，则看不到任何通知（我正在控制台中进行打印）。但是当我重新打开该应用程序时，通知会被打印。

下面是我的通知注册代码

    FirebaseMessagesImpl msg = FirebaseMessagesImpl();
         msg.requestPermissions();
    
    //Get configured with firebase messaging to recieve messages
    msg.getMessage().then((_) {
     msg.register().then((String token) {
     print(token);
    
     //Register to the `topic` so we get messages sent to the topic
     msg.topicRegister();
.........
}

FirebaseMessagesImpl

  import 'package:firebase_messaging/firebase_messaging.dart';

  import 'package:http/http.dart' as http;
  import 'dart:convert' as convert;

  class FirebaseMessagesImpl {
    final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();

    String serverToken =
        "AAAAAAA:XXXXXXXXX-YYYYYYYY-ZZZZ-BBBBBBBB";

    Future<String> register() async {
      String token = "";
      _firebaseMessaging.getToken().then((t) {
        token = t;
        print("ha: " + t);
      });

      return token;
    }

    Future<void> getMessage() async {
      _firebaseMessaging.configure(
          onMessage: (Map<String, dynamic> message) async {
        print('on message $message');
        //setState(() => _message = message["notification"]["title"]);
      }, onResume: (Map<String, dynamic> message) async {
        print('on resume $message');
        // setState(() => _message = message["notification"]["title"]);
      }, onLaunch: (Map<String, dynamic> message) async {
        print('on launch $message');
        //setState(() => _message = message["notification"]["title"]);
      });
    }

    void topicRegister() {
    // _firebaseMessaging.subscribeToTopic("mobile_admin");
      _firebaseMessaging.subscribeToTopic("puppies");
    }



    void requestPermissions() async
    {
      await _firebaseMessaging.requestNotificationPermissions(
        const IosNotificationSettings(sound:true, badge:true, alert:true, provisional:false)
      );
    }

}

以下是我的 Info.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>FirebaseAppDelegateProxyEnabled</key>
    <false/>
    <key>CFBundleDevelopmentRegion</key>
    <string>$(DEVELOPMENT_LANGUAGE)</string>
    <key>CFBundleExecutable</key>
    <string>$(EXECUTABLE_NAME)</string>
    <key>CFBundleIdentifier</key>
    <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
    <key>CFBundleInfoDictionaryVersion</key>
    <string>6.0</string>
    <key>CFBundleName</key>
    <string>MY APP NAME</string>
    <key>CFBundlePackageType</key>
    <string>APPL</string>
    <key>CFBundleShortVersionString</key>
    <string>$(FLUTTER_BUILD_NAME)</string>
    <key>CFBundleSignature</key>
    <string>????</string>
    <key>CFBundleVersion</key>
    <string>$(FLUTTER_BUILD_NUMBER)</string>
    <key>LSRequiresIPhoneOS</key>
    <true/>
    <key>UIBackgroundModes</key>
    <array>
        <string>fetch</string>
        <string>remote-notification</string>
    </array>
    <key>UILaunchStoryboardName</key>
    <string>LaunchScreen</string>
    <key>UIMainStoryboardFile</key>
    <string>Main</string>
    <key>UISupportedInterfaceOrientations</key>
    <array>
        <string>UIInterfaceOrientationPortrait</string>
        <string>UIInterfaceOrientationLandscapeLeft</string>
        <string>UIInterfaceOrientationLandscapeRight</string>
    </array>
    <key>UISupportedInterfaceOrientations~ipad</key>
    <array>
        <string>UIInterfaceOrientationPortrait</string>
        <string>UIInterfaceOrientationPortraitUpsideDown</string>
        <string>UIInterfaceOrientationLandscapeLeft</string>
        <string>UIInterfaceOrientationLandscapeRight</string>
    </array>
    <key>UIViewControllerBasedStatusBarAppearance</key>
    <false/>
</dict>
</plist>

下面是 AppDelegate.swift

import UIKit
import Flutter
import Firebase

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    FirebaseApp.configure()
    GeneratedPluginRegistrant.register(with: self)
    if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
    }
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
    
    override func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {

      Messaging.messaging().apnsToken = deviceToken
      super.application(application, didRegisterForRemoteNotificationsWithDeviceToken: deviceToken)
    }
}

正如其他人在其他答案中所建议的那样，我从AppDelegate.swift代码中删除了以下部分并进行了尝试，但仍然存在相同的问题。

if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
    }

我也已按照指南将苹果密钥文件上传到Firebase项目cloud messaging部分。

下面是我的JSon代码发送通知

{
           "notification": {
              "body": "body",
              "title": "title"
           },
           "priority": "high",
           "data": {
            "body": "body",
              "title": "title",
              "click_action": "FLUTTER_NOTIFICATION_CLICK",
              "id": "1",
              "status": "done",
              "image": "https://ibin.co/2t1lLdpfS06F.png"
           },
           "to": "/topics/puppies"
        }

我的登录功能如下

我是iOS的新手，无法知道发生了什么。我想就像在Android中一样，当应用程序处于后台或关闭状态时，通知会自动显示在通知栏中。

更新

根据@nandish的建议，我如下更改了AppDelegate.swift文件

import UIKit
import Flutter
import Firebase

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate, UNUserNotificationCenterDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    FirebaseApp.configure()
    GeneratedPluginRegistrant.register(with: self)
    UNUserNotificationCenter.current().delegate = self
    
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
    
    override func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {

      Messaging.messaging().apnsToken = deviceToken
      super.application(application, didRegisterForRemoteNotificationsWithDeviceToken: deviceToken)
    }
    
    // MARK: - UNUserNotificationCenterDelegate Method
    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        completionHandler([.alert])
    }

    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {

     }
}

然后我遇到以下错误

UNUserNotificationCenter' is only available in iOS 10.0 or newer
        func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {

更新

在前台，发出通知时，我从应用程序收到以下响应。那也只能在iPhone Simulator中使用，而不能在真实设备中使用。

{from: /topics/puppies, status: done, id: 1, notification: {body: body, title: title, e: 1, tag: topic_key_9204266xxxxxxx535}, title: title, image: https://ibin.co/2t1lLdpfS06F.png, collapse_key: com.aaa.xxx, body: body, click_action: FLUTTER_NOTIFICATION_CLICK}

Answer 1

首先，如果您使用Firebase Cloud Messaging进行通知，则Android将在应用打开或关闭时收到通知。但在iOS方面，iOS正在使用APN's (Apple Push Notification)。

*-您应该在真实设备上尝试。在iOS模拟器上，获取通知并不稳定。在*

在Firebase控制台上，转到Settings > Cloud Messaging > iOS Application Configuration，然后从Apple Developer面板添加APN标识密钥。您可以在this document上看到。

此外，您还应该在通知有效载荷上添加"content_available": true。

这里有一个例子：

{
  "to": "/topics/topic_name",
  "content_available": true,
  "notification": {
    "title": "TITLE TEXT",
    "body": "BODY TEXT",
    "content_available": true
  },
  "data": {
    "body": "BODY TEXT",
    "title": "TITLE TEXT",
    "click_action": "FLUTTER_NOTIFICATION_CLICK"
  }
}

Answer 2

对于后台通知，您可以尝试在目标项目的“签名与功能”下单击“ +功能” ，以添加“背景模式” 功能。 “ 标签，并按照下面的Apple文档中的建议启用远程通知。

https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/pushing_background_updates_to_your_app

还应在AppDelegate.swift中添加以下内容：

class AppDelegate: FlutterAppDelegate , UNUserNotificationCenterDelegate {
      override func application(_ application: UIApplication,
          didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
       ....
       UNUserNotificationCenter.current().delegate = self
       ....
    }
    ....

    // MARK: - UNUserNotificationCenterDelegate Method
    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        completionHandler([.alert])
    }

    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {

     }
}

Answer 3

我在firebase_messaging 6.0.16中发现一个问题时遇到了一个非常相似的问题，现在它已更新为7.0.0

我调整了info.plist并进行了更改

<key>FirebaseAppDelegateProxyEnabled</key><false/>
to <key>FirebaseAppDelegateProxyEnabled</key>
    <string>false</string>

由于我没有升级到较新的通知，因此我的通知在firebase_6.0.9中正常工作。

我的appdelegate是：

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    GeneratedPluginRegistrant.register(with: self)
    //FirebaseApp.configure()
    if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
    }
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
  }

它与您的有所不同。

Answer 4

您是否尝试过投射传递到onMessage回调的消息数据，

data = Map<String, dynamic>.from(message['data']);

Flutter Push Notifications：无法在后台或关闭应用程序时接收通知

4 个答案: