OneSignal：如何在Xamarin.Forms应用程序的AppDelegate中处理notificationOpened？

Question

我正在实现在Xamarin.Forms中使用OneSignal推送通知。

我需要将OneSignal返回的字符串AdditionalData传递给App()构造函数。

因此，我使用HandleNotificationOpened(OSNotificationOpenedResult result)处理通知点击事件并获取该字符串，然后将其传递给LoadApplication(new App(myData))。

为了实现这个功能，我在Android的MainActivity和iOS的AppDelegate中编写了代码。

在Android上，一切都正常运行；也就是说，HandleNotificationOpened()获取了additionalData并将其传递给LoadApplication(new App(myData))。

但在iOS上，当我打开通知时，HandleNotificationOpened()代码没有被调用。

AppDelegate.cs

static string s = null;

public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
    OneSignal.Current.StartInit("MyKey").HandleNotificationOpened(HandleNotificationOpened).EndInit();
    
    if(s!=null)
    {
        LoadApplication(new App(s));
    }
    else
    {
        LoadApplication(new App("myUrl.lasso")); 
    }

    return base.FinishedLaunching(app, options);
}

private static void HandleNotificationOpened(OSNotificationOpenedResult result)
{
    OSNotificationPayload payload = result.notification.payload;
    Dictionary<string, object> additionalData = payload.additionalData;

    if (additionalData != null)
    {
        if (additionalData.ContainsKey("url_direct"))
        {
            s = additionalData["url_direct"].ToString();
            System.Diagnostics.Debug.WriteLine("We need to redirect it to: " + s);
        }
    }
}

- Apoorv Mehrotra

Answer 1

答案

重写 AppDelegate 中的 DidReceivedRemoteNotification 事件。

代码

public override void DidReceiveRemoteNotification(UIApplication application, NSDictionary userInfo, System.Action<UIBackgroundFetchResult> completionHandler)
{
    base.DidReceiveRemoteNotification(application, userInfo, completionHandler);

    NSDictionary aps = userInfo.ObjectForKey(new NSString("aps")) as NSDictionary;
            
    string alert = string.Empty;
    if (aps.ContainsKey(new NSString("alert")))
        alert = (aps [new NSString("alert")] as NSString).ToString();

    if (application.ApplicationState == UIApplicationState.Active)
    {
        //app is currently active, you can get your payload (userInfo) data here
    }
    else if (application.ApplicationState == UIApplicationState.Background)
    {
        //app is in background, you can get your payload (userInfo)
    }
    else if (application.ApplicationState == UIApplicationState.Inactive)
    {
        //app is transitioning from background to foreground (user taps notification), do what you need when user taps here, you can get your payload (userInfo)
    }
}

- Pavan V Parekh

Answer 2

我找到了一个解决方法。 实际上，我们无法在AppDelegate的finishedLaunching()中捕获通知点击，这就是为什么HandleNotificationOpened(HandleNotificationOpened)在iOS中无法正常工作的原因。因此，我已经在PCL公共文件夹App类中实现了它。

- Apoorv Mehrotra