适用于 iOS 的 Xamarin Firebase 云消息传递（appDelegate）RemoteMessageDelegate 错误

Posted 2023-02-24

【中文标题】适用于 iOS 的 Xamarin Firebase 云消息传递（appDelegate）RemoteMessageDelegate 错误

【英文标题】：Xamarin Firebase Cloud Messaging for iOS (appDelegate) RemoteMessageDelegate error

【发布时间】：2017-03-17 17:07:25

【问题描述】：

我正在尝试将通知的 ios 处理程序迁移到 Firebase 服务器。在 appDelegate.cs 文件中，xamarin 网站 (https://components.xamarin.com/gettingstarted/firebaseioscloudmessaging) 上的文档是这样的步骤之一：

// Register your app for remote notifications.
if (UIDevice.CurrentDevice.CheckSystemVersion (10, 0)) 
    // iOS 10 or later
    var authOptions = UNAuthorizationOptions.Alert | UNAuthorizationOptions.Badge | UNAuthorizationOptions.Sound;
    UNUserNotificationCenter.Current.RequestAuthorization (authOptions, (granted, error) => 
        Console.WriteLine (granted);
    );

    // For iOS 10 display notification (sent via APNS)
    UNUserNotificationCenter.Current.Delegate = this;

    // For iOS 10 data message (sent via FCM)
    Messaging.SharedInstance.RemoteMessageDelegate = this;
 else 
    // iOS 9 or before
    var allNotificationTypes = UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound;
    var settings = UIUserNotificationSettings.GetSettingsForTypes (allNotificationTypes, null);
    UIApplication.SharedApplication.RegisterUserNotificationSettings (settings);


UIApplication.SharedApplication.RegisterForRemoteNotifications ();

两行代码，messaging.sharedinstance.... 和 UNUSerNotificationCenter.Current... 接收 appdelegate 工作负载。为了使 appdelegate 实现 Usernotificationcenterdelegate，这是可行的。但是，这不适用于 Firebase 消息委托。 firebase 消息委托无法识别。我已经安装了云消息包 (v1.2.1.1)、analytics (3.6.0)、Core (3.4.5) 和实例 ID (1.0.8)。这些包是通过 Nuget 包管理器安装的。

有人知道为什么找不到 FIRMessagingDelegate，或者这些版本的 iOS 包需要做一些具体的事情吗？

【参考方案1】：

FIRMessagingDelegate 被命名为IMessagingDelegate：

[Protocol (Name = "FIRMessagingDelegate", WrapperType = typeof(MessagingDelegateWrapper)), ProtocolMember (IsRequired = true, IsProperty = false, IsStatic = false, Name = "ApplicationReceivedRemoteMessage", Selector = "applicationReceivedRemoteMessage:", ParameterType = new Type[] 
 typeof(RemoteMessage) , ParameterByRef = new bool[]  false ), Introduced (PlatformName.iOS, 10, 0, PlatformArchitecture.None, null)]
public interface IMessagingDelegate : INativeObject, IDisposable

  ~~~

在您的UIApplicationDelegate 上实现IMessagingDelegate：

[Register("AppDelegate")]
public class AppDelegate : UIApplicationDelegate, IMessagingDelegate

    ~~~~

    public void ApplicationReceivedRemoteMessage(RemoteMessage remoteMessage)
    
       Console.WriteLine(remoteMessage);
    

    ~~~~

【讨论】：

正是我需要知道的！谢谢！显然，“ApplicationReceivedRemoteMessage”函数已在“入门”文档中声明，但在更下方的代码中更加隐蔽。老实说，应该重写以解决这个问题！