Not getting push notification when App is running in iOS for Xamarin.Forms

问题

I have implemented UrbanAirship for push notification. I get notification when app is closed of in background. But I am not getting notification when app is running.

I have attached my code. Can anybody please look into and let me know what I am missing here?

Thank you.

AppDelegates.cs

public override bool FinishedLaunching(UIApplication uiApplication, NSDictionary launchOptions)
{
    UAirship.TakeOff();

    Xamarin.Forms.Forms.Init();
    LoadApplication(new App());

    UIApplication.SharedApplication.StatusBarHidden = false;
    UIApplication.SharedApplication.SetStatusBarStyle(UIStatusBarStyle.LightContent, false);

    _networkManager = new NetworkManager();

    UAirship.Push.UserPushNotificationsEnabled = true; 
    string chanelid = UAirship.Push.ChannelID;

    return base.FinishedLaunching(uiApplication, launchOptions);
}

[Export("userNotificationCenter:didReceiveNotificationResponse:withCompletionHandler:")]
public void DidReceiveNotificationResponse(UserNotifications.UNUserNotificationCenter center, UserNotifications.UNNotificationResponse response, Action completionHandler)
{
    var alert = new UIAlertView("Title1", "Message1", null, "Cancel", "OK");
    alert.Show();
    //TAPPED NOTIFICATION
}

//Or 

//Fire when background received notification is clicked
public override void DidReceiveRemoteNotification(UIApplication application, NSDictionary userInfo, Action<UIBackgroundFetchResult> completionHandler)
{
    var alert = new UIAlertView("Title2", "Message2", null, "Cancel", "OK");
    alert.Show();
}

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>CFBundleExecutable</key>
    <string></string>
    <key>CFBundleDisplayName</key>
    <string>MyProject</string>
    <key>CFBundleName</key>
    <string>MyProject</string>
    <key>CFBundleIdentifier</key>
    <string>com.xxxxxxxx.xxxxx</string>
    <key>CFBundleShortVersionString</key>
    <string>1.0</string>
    <key>CFBundleVersion</key>
    <string>1.0</string>
    <key>LSRequiresIPhoneOS</key>
    <true/>
    <key>MinimumOSVersion</key>
    <string>8.0</string>
    <key>UIDeviceFamily</key>
    <array>
      <integer>1</integer>
      <integer>2</integer>
    </array>
    <key>UILaunchStoryboardName</key>
    <string>LaunchScreen</string>
    <key>UIRequiredDeviceCapabilities</key>
    <array>
      <string>armv7</string>
    </array>
    <key>UISupportedInterfaceOrientations</key>
    <array>
      <string>UIInterfaceOrientationPortrait</string>
    </array>
    <key>UISupportedInterfaceOrientations~ipad</key>
    <array>
      <string>UIInterfaceOrientationPortrait</string>
      <string>UIInterfaceOrientationPortraitUpsideDown</string>
      <string>UIInterfaceOrientationLandscapeLeft</string>
      <string>UIInterfaceOrientationLandscapeRight</string>
    </array>
    <key>XSAppIconAssets</key>
    <string>Assets.xcassets/AppIcons.appiconset</string>
    <key>UIViewControllerBasedStatusBarAppearance</key>
    <false/>
    <key>NSAppTransportSecurity</key>
    <dict>
      <key>NSExceptionDomains</key>
      <dict>
        //some values
      </dict>
    </dict>
    <key>LSApplicationQueriesSchemes</key>
    <array>
      <string>fbapi</string>
      <string>fb-messenger-api</string>
      <string>fbauth2</string>
      <string>fbshareextension</string>
    </array>
    <key>UIStatusBarHidden</key>
    <true/>
    <key>UIMainStoryboardFile</key>
    <string>LaunchScreen</string>
    <key>NSPhotoLibraryUsageDescription</key>
    <string></string>
    <key>UIBackgroundModes</key>
    <array>
      <string>remote-notification</string>
    </array>
  </dict>
</plist>

Specification

Windows 10

Visual Studio 2017(Enterprise edition)

Xamarin.Forms

回答1:

We had a lot of issues getting ours to work. This is what we came up with that worked in the foreground and background:

[Export("userNotificationCenter:willPresentNotification:withCompletionHandler:")]
public void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
{
    //FOREGROUND
    handleNotification(notification.Request.Content.UserInfo);
    completionHandler(UNNotificationPresentationOptions.Alert);
}
public void ApplicationReceivedRemoteMessage(RemoteMessage remoteMessage)
{
    //REMOTE iOS 10
    //NOT USED CURRENTLY
    handleNotification(remoteMessage.AppData);
}
public override void DidReceiveRemoteNotification(UIApplication application, NSDictionary userInfo, Action<UIBackgroundFetchResult> completionHandler)
{
    //BACKGROUND
    handleNotification(userInfo);
    completionHandler(UIBackgroundFetchResult.NewData);
}

private void handleNotification(NSDictionary userInfo)
{
    var payload = userInfo["TheStringIdentifierWhenSendingANotification"];

    var notificationData = JsonConvert.DeserializeObject<NotificationData>(payload.ToString());

    if (notificationData != null)
        MessagingCenter.Send<INotification, NotificationData>(this, Core.Helpers.Constants.Messaging.Notification, notificationData);
}

The main difference that I see is that our method is willPresentNotification and yours is didReceiveNotificationResponse. I'm not sure if it changed in later iOS versions, but try this method and see if that works for you.

Also, I'm assuming if you're receiving any notifications, then your certificate and entitlements are setup correctly; but double-check those just in case.

来源：https://stackoverflow.com/questions/50255212/not-getting-push-notification-when-app-is-running-in-ios-for-xamarin-forms