xamarin.ios 本地通知推送

  由于ios10版本以后UILocalNotification被标为弃用了，所以要添加新的本地通知推送功能，下面提供一些代码参考。

  一、先在AppDelegate.cs上注册本地通知推送功能。

 1  public override bool FinishedLaunching(UIApplication app, NSDictionary options)
 2         {
 3             global::Xamarin.Forms.Forms.Init();
 4             global::ZXing.Net.Mobile.Forms.iOS.Platform.Init();
 5             Renderers.KeyboardOverlapRenderer.Init();
 6 
 7             if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
 8             {
 9                 //Notification framework.
10                 UNUserNotificationCenter.Current.RequestAuthorization(UNAuthorizationOptions.Alert | UNAuthorizationOptions.Badge | UNAuthorizationOptions.Sound, (approved, err) =>
11                 {
12                     // Handle approval
13                 });
14 
15                 //Get current notification settings.
16                 UNUserNotificationCenter.Current.GetNotificationSettings((settings) =>
17                 {
18                     var alertsAllowed = (settings.AlertSetting == UNNotificationSetting.Enabled);
19                 });
20                 UNUserNotificationCenter.Current.Delegate = new UserNotificationCenterDelegate();
21             }
22 ｝

同时用到一个处理函数，代码如下：

 1 public class UserNotificationCenterDelegate : UNUserNotificationCenterDelegate
 2     {
 3         #region Constructors
 4         public UserNotificationCenterDelegate()
 5         {
 6         }
 7         #endregion
 8 
 9         #region Override Methods
10         public override void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
11         {
12             // Do something with the notification
13             Console.WriteLine("Active Notification: {0}", notification);
14 
15             // Tell system to display the notification anyway or use
16             // `None` to say we have handled the display locally.
17             completionHandler(UNNotificationPresentationOptions.Alert | UNNotificationPresentationOptions.Sound);
18         }
19         #endregion
20     }

通知处理函数