Question

我正在为Android和iOS开发一个Flutter应用程序。它具有通知，我实现了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。

我现在正在向topics发送通知，该通知在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（我正在控制台中打印通知）。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。

我正在使用以下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"
    }

我是iOS新手。当应用程序处于后台或关闭状态时，为什么我没有收到通知？

Flutter：当应用程序在后台或在iOS中关闭时，推送通知不起作用

0 个答案: