Xamarin Firebase Cloud Messaging for iOS（appDelegate）RemoteMessageDelegate错误

Question

我正在尝试将iOS处理程序的通知迁移到firebase服务器。在AppDelegate.cs文件中，xamarin站点（https://components.xamarin.com/gettingstarted/firebaseIosCloudMessaging）上的文档步骤之一如下：

// 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。要使appdelegate实现Usernotificationcenterdelegate，可以使用以下方法。但是，这对Firebase消息委托不起作用。无法识别firebase消息委托。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)。这些软件包是通过Nuget软件包管理器安装的。

有没有人知道为什么找不到FIRMessagingDelegate，或者是否需要为这些版本的iOS包做一些特定的事情？

Answer 1

FirmessagingDelegate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);
    }

    ~~~~
}