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。

 public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            global::Xamarin.Forms.Forms.Init();
            global::ZXing.Net.Mobile.Forms.iOS.Platform.Init();
            Renderers.KeyboardOverlapRenderer.Init();

            if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
            {
                //Notification framework.
                UNUserNotificationCenter.Current.RequestAuthorization(UNAuthorizationOptions.Alert | UNAuthorizationOptions.Badge | UNAuthorizationOptions.Sound, (approved, err) =>
                {
                    // Handle approval
                });

                //Get current notification settings.
                UNUserNotificationCenter.Current.GetNotificationSettings((settings) =>
                {
                    var alertsAllowed = (settings.AlertSetting == UNNotificationSetting.Enabled);
                });
                UNUserNotificationCenter.Current.Delegate = new UserNotificationCenterDelegate();
            }
｝

同时用到一个处理函数，代码如下：

public class UserNotificationCenterDelegate : UNUserNotificationCenterDelegate
    {
        #region Constructors
        public UserNotificationCenterDelegate()
        {
        }
        #endregion

        #region Override Methods
        public override void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
        {
            // Do something with the notification
            Console.WriteLine("Active Notification: {0}", notification);

            // Tell system to display the notification anyway or use
            // `None` to say we have handled the display locally.
            completionHandler(UNNotificationPresentationOptions.Alert | UNNotificationPresentationOptions.Sound);
        }
        #endregion
    }

二、定义调用本地通知推送的函数，如果是xamarn.From可以写成一个Dependencies方法来调用。

public void ShowNotification(string strNotificationTitle,
                                string strNotificationSubtitle,
                                string strNotificationDescription,
                                string strNotificationIdItem,
                                string strDateOrInterval,
                                int intervalType,
                                string extraParameters)
        {
            //intervalType: 1 - set to date | 2 - set to interval


            //Object creation.
            var notificationContent = new UNMutableNotificationContent();


            //Set parameters.
            //notificationContent.Title = "Mesince";
            notificationContent.Subtitle = strNotificationSubtitle;
            notificationContent.Body = strNotificationDescription;
            //notificationContent.Badge = 1;
            notificationContent.Badge = Int32.Parse(strNotificationIdItem);
            notificationContent.Sound = UNNotificationSound.Default;


            //Set date.
            //DateTime notificationContentDate = Convert.ToDateTime(strDateOrInterval);
            DateTime notificationContentDate = DateTime.Now.AddMilliseconds(10);

            NSDateComponents notificationContentNSCDate = new NSDateComponents();
            notificationContentNSCDate.Year = notificationContentDate.Year;
            notificationContentNSCDate.Month = notificationContentDate.Month;
            notificationContentNSCDate.Day = notificationContentDate.Day;
            notificationContentNSCDate.Hour = notificationContentDate.Hour;
            notificationContentNSCDate.Minute = notificationContentDate.Minute;
            notificationContentNSCDate.Second = notificationContentDate.Second;
            notificationContentNSCDate.Nanosecond = (notificationContentDate.Millisecond * 1000000);


            //Set trigger and request.
            var notificationRequestID = Guid.NewGuid().ToString();
            UNNotificationRequest notificationRequest = null;
            //在某月某日某时触发
            if (intervalType == 1)
            {
                var notificationCalenderTrigger = UNCalendarNotificationTrigger.CreateTrigger(notificationContentNSCDate, false);

                notificationRequest = UNNotificationRequest.FromIdentifier(notificationRequestID, notificationContent, notificationCalenderTrigger);
            }
            else
            {
                //一定时间后触发
                var notificationIntervalTrigger = UNTimeIntervalNotificationTrigger.CreateTrigger(Int32.Parse(strDateOrInterval), false);

                notificationRequest = UNNotificationRequest.FromIdentifier(notificationRequestID, notificationContent, notificationIntervalTrigger);
            }


            //Add the notification request.
            UNUserNotificationCenter.Current.AddNotificationRequest(notificationRequest, (err) =>
            {
                if (err != null)
                {
                    System.Diagnostics.Debug.WriteLine("Error : " + err);
                }
            });
        }

方法中定义了两种方式，只实现了一种。

三、上面是Ios 10以上版本的方法，旧版本的方法在此也放出来：

if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
                {
                    ShowNotification(Title, Title, Content, "1", "2017-28-02 08:30:00", 1, "");
                }
                else
                {
                    var settings = UIUserNotificationSettings.GetSettingsForTypes(UIUserNotificationType.Alert | UIUserNotificationType.Sound, null);
                    UIApplication.SharedApplication.RegisterUserNotificationSettings(settings);

                    UILocalNotification notification = new UILocalNotification();
                    notification.TimeZone = NSTimeZone.DefaultTimeZone;
                    notification.AlertLaunchImage = "ico.png";
                    notification.FireDate = NSDate.FromTimeIntervalSinceNow(0);
                    notification.AlertAction = AppResource.提示;//获取得访问消息中心权限对话框标题
                    notification.AlertTitle = Title;
                    notification.AlertBody = Content;
                    if (CurrentApp.HasSound)
                    {
                        notification.SoundName = UILocalNotification.DefaultSoundName;
                    }
                    if (CurrentApp.HasVibrate)
                    {
                    }
                    //判断是否开启新邮件提醒
                    if (CurrentApp.NewMialRemind)
                    {
                        //UIApplication.SharedApplication.ScheduleLocalNotification(notification);
                        //立即触发一个通知
                        UIApplication.SharedApplication.PresentLocalNotificationNow(notification);
                    }
                }