C# UIApplication类代码示例

        public override void DidEnterBackground(UIApplication application)
        {
            ourTask = application.BeginBackgroundTask(delegate
            {    //this is the action that will run when the task expires
                if (ourTask != 0) //this check is because we want to avoid ending the same task twice
                {
                    application.EndBackgroundTask(ourTask); //end the task
                    ourTask = 0; //reset the id
                }
            });

            //we start an asynchronous operation
            //so that we make sure that DidEnterBackground
            //executes normally
            new System.Action(delegate
            {
                MonoGameGame.EnterBackground();

                //Since we are in an asynchronous method,
                //we have to make sure that EndBackgroundTask
                //will run on the application's main thread
                //or we might have unexpected behavior.
                application.BeginInvokeOnMainThread(delegate
                {
                        if (ourTask != 0) //same as above
                        {
                            application.EndBackgroundTask(ourTask);
                            ourTask = 0;
                        }
                   });
            }).BeginInvoke(null, null);
        }

		public override bool FinishedLaunching (UIApplication application, NSDictionary launchOptions)
		{
			// Override point for customization after application launch.
			// If not required for your application you can safely delete this method

			return true;
		}

 public override void OnResignActivation(UIApplication application)
 {
     // Invoked when the application is about to move from active to inactive state.
     // This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message)
     // or when the user quits the application and it begins the transition to the background state.
     // Games should use this method to pause the game.
 }

        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            //UserDialogs.Init();
            global::Xamarin.Forms.Forms.Init();
            Insights.Initialize("0d729b1f8027a9219421908d521e3af664ae52fc");
            PushNotificationManager pushmanager = PushNotificationManager.PushManager;
            pushmanager.Delegate = this;

            if (options != null)
            {
                if (options.ContainsKey(UIApplication.LaunchOptionsRemoteNotificationKey))
                { 
                    pushmanager.HandlePushReceived(options);
                }
            }

            pushmanager.RegisterForPushNotifications();

            try
            {
                var token = PushNotificationManager.PushManager.GetPushToken;
                
                if (!String.IsNullOrEmpty(token))
                    App.PushWooshToken = token;
            }
            catch (Exception ex)
            {
                Insights.Report(ex);
            }

            LoadApplication(new App());

            return base.FinishedLaunching(app, options);
        }

		public override bool FinishedLaunching(UIApplication app, NSDictionary options)
		{
			window = new UIWindow(UIScreen.MainScreen.Bounds);

			var controller = new UIViewController();
			var view = new UIView (UIScreen.MainScreen.Bounds);
			view.BackgroundColor = UIColor.White;
			controller.View = view;

			controller.NavigationItem.Title = "SignalR Client";

			var textView = new UITextView(new CGRect(0, 0, 320, view.Frame.Height - 0));
			view.AddSubview (textView);


			navController = new UINavigationController (controller);

			window.RootViewController = navController;
			window.MakeKeyAndVisible();

			if (SIGNALR_DEMO_SERVER == "http://YOUR-SERVER-INSTANCE-HERE") {
				textView.Text = "You need to configure the app to point to your own SignalR Demo service.  Please see the Getting Started Guide for more information!";
				return true;
			}
			
			var traceWriter = new TextViewWriter(SynchronizationContext.Current, textView);

			var client = new CommonClient(traceWriter);
			client.RunAsync(SIGNALR_DEMO_SERVER);

			return true;
		}

        public override void WillTerminate(UIApplication application)
        {
            var geo = this.GetService<WshLst.Core.Interfaces.IGeolocator>();
            geo.StopTracking();

            base.WillTerminate(application);
        }

        //
        // This method is invoked when the application has loaded and is ready to run. In this 
        // method you should instantiate the window, load the UI into it and then make the window
        // visible.
        //
        // You have 17 seconds to return from this method, or iOS will terminate your application.
        //
        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
			Current = this;

			var log = new LoggerConfiguration().CreateLogger();

			log.Information("Loading");

            UIApplication.SharedApplication.StatusBarStyle = UIStatusBarStyle.LightContent;

            // create a new window instance based on the screen size
            window = new UIWindow(UIScreen.MainScreen.Bounds);

            // If you have defined a view, add it here:
            // window.RootViewController  = navigationController;

			var rootNavigationController = Utilities.BuildNavigationController();
            rootNavigationController.PushViewController(new ViewControllers.Login(), false);
            window.RootViewController = rootNavigationController;

            // make the window visible
            window.MakeKeyAndVisible();

            Utilities.SetTintColor();

            autoSuspendHelper.FinishedLaunching(app, options);

            return true;
        }

		public override bool FinishedLaunching (UIApplication app, NSDictionary options)
		{
			// create a new window instance based on the screen size
			window = new UIWindow (UIScreen.MainScreen.Bounds);
			
			// make the window visible
			window.MakeKeyAndVisible ();
			
			// create our nav controller
			navController = new UINavigationController ();

			// create our home controller based on the device
			if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Phone) {
				homeViewController = new Tasky.Screens.iPhone.Home.controller_iPhone();
			} else {
//				homeViewController = new Hello_UniversalViewController ("Hello_UniversalViewController_iPad", null);
			}
			
			// Styling
			UINavigationBar.Appearance.TintColor = UIColor.FromRGB (38, 117 ,255); // nice blue
			UITextAttributes ta = new UITextAttributes();
			ta.Font = UIFont.FromName ("AmericanTypewriter-Bold", 0f);
			UINavigationBar.Appearance.SetTitleTextAttributes(ta);
			ta.Font = UIFont.FromName ("AmericanTypewriter", 0f);
			UIBarButtonItem.Appearance.SetTitleTextAttributes(ta, UIControlState.Normal);
			

			// push the view controller onto the nav controller and show the window
			navController.PushViewController(homeViewController, false);
			window.RootViewController = navController;
			window.MakeKeyAndVisible ();
			
			return true;
		}

        public override void DetectWebViewLoadFinishedEvent(UIApplication application, NSDictionary launchOptions)
        {
            UIApplicationState applicationState = application.ApplicationState;
            ((UnityUI_iOSViewController_UIWebView) MainViewController ()).webView.LoadFinished += delegate {
                #if DEBUG
            log ("************** WEBVIEW LOAD FINISHED");
                #endif

                if (UIDevice.CurrentDevice.CheckSystemVersion (8, 0)) {
                    UIView.AnimationsEnabled = true;  //enable again animation in all view  (see UnityUI_iOSViewController_UIWebView#loadWebView for details)
                }

                // inform other weak delegates (if exist) about the web view finished event
                IPhoneServiceLocator.WebViewLoadingFinished(applicationState, launchOptions);

                // The NSDictionary options variable would contain any notification data if the user clicked the 'view' button on the notification
                // to launch the application.
                // This method processes these options from the FinishedLaunching.
                processLaunchOptions (launchOptions, true, applicationState);

                // Processing extra data received when launched externally (using custom scheme url)
                processLaunchData ();

            };
        }

        public override bool FinishedLaunching(UIApplication app, NSDictionary options) {
            UserDialogs.Init();
            Forms.Init();
            this.LoadApplication(new App());

            return base.FinishedLaunching(app, options);
        }

 public GraphCodeWindowRegistrar(Lifetime lifetime, ToolWindowManager toolWindowManager,
                                     GraphCodeToolWindow descriptor, UIApplication environment)
 {
     _environment = environment;
     _lifetime = lifetime;
     
     _toolWindowClass = toolWindowManager.Classes[descriptor];
     //_toolWindowClass.RegisterEmptyContent(
     //  lifetime,
     //  lt =>
     //  {
     //      var graphs = (new GraphLoader()).Load();
     //      var tabControl = new System.Windows.Controls.TabControl();
     //      var zcontrols = new List<ZoomControl>();
     //      foreach (var graph in graphs)
     //      {
     //          var gArea = InitializeGraphArea.Initialize(graph);
     //          var zcontrol = new ZoomControl();
     //          zcontrol.Content = gArea;
     //          zcontrols.Add(zcontrol);
     //      }
     //      tabControl.ItemsSource = zcontrols;
     //      return (new EitherControl(tabControl)).BindToLifetime(lt);
     //  });
 }

 public override void OnActivated(UIApplication application)
 {
     // FBSample logic
     // We need to properly handle activation of the application with regards to SSO
     //  (e.g., returning from iOS 6.0 authorization dialog or from fast app switching).
     FBSession.ActiveSession.HandleDidBecomeActive();
 }

		public override bool FinishedLaunching (UIApplication app, NSDictionary options)
		{
			window = new UIWindow (UIScreen.MainScreen.Bounds);
			runner = new TouchRunner (window);

			// tests can be inside the main assembly
			runner.Add (Assembly.GetExecutingAssembly ());
#if false
			// you can use the default or set your own custom writer (e.g. save to web site and tweet it ;-)
			runner.Writer = new TcpTextWriter ("10.0.1.2", 16384);
			// start running the test suites as soon as the application is loaded
			runner.AutoStart = true;
			// crash the application (to ensure it's ended) and return to springboard
			runner.TerminateAfterExecution = true;
#endif
#if false
			// you can get NUnit[2-3]-style XML reports to the console or server like this
			// replace `null` (default to Console.Out) to a TcpTextWriter to send data to a socket server
			// replace `NUnit2XmlOutputWriter` with `NUnit3XmlOutputWriter` for NUnit3 format
			runner.Writer = new NUnitOutputTextWriter (runner, null, new NUnitLite.Runner.NUnit2XmlOutputWriter ());
			// the same AutoStart and TerminateAfterExecution can be used for build automation
#endif
			window.RootViewController = new UINavigationController (runner.GetViewController ());
			window.MakeKeyAndVisible ();
			return true;
		}

        //
        // This method is invoked when the application has loaded and is ready to run. In this
        // method you should instantiate the window, load the UI into it and then make the window
        // visible.
        //
        // You have 17 seconds to return from this method, or iOS will terminate your application.
        //
        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            // create a new window instance based on the screen size
            window = new UIWindow (UIScreen.MainScreen.Bounds);

            InvokeOnMainThread(delegate {
                TwitterAccount.getAccount();
            });

            flyoutController = new FlyOutNavigationController();
            tl = new Timeline(flyoutController);
            flyoutController.NavigationRoot = new RootElement("")
            {
                new Section("Navigation")
                {
                    new StringElement("Timeline")
                }
            };

            flyoutController.ViewControllers = new UIViewController[]
            {
                new UINavigationController(tl)
            };

            window.AddSubview(flyoutController.View);

            // make the window visible
            window.MakeKeyAndVisible ();

            return true;
        }

		//
		// This method is invoked when the application has loaded and is ready to run. In this 
		// method you should instantiate the window, load the UI into it and then make the window
		// visible.
		//
		// You have 17 seconds to return from this method, or iOS will terminate your application.
		//
		public override bool FinishedLaunching (UIApplication app, NSDictionary options)
		{
			// create a new window instance based on the screen size
			window = new UIWindow (UIScreen.MainScreen.Bounds);
			
			// load the appropriate UI, depending on whether the app is running on an iPhone or iPad
			if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Phone) {
				var controller = new RootViewController ();
				navigationController = new UINavigationController (controller);
				window.RootViewController = navigationController;
			} else {
				var masterViewController = new RootViewController ();
				var masterNavigationController = new UINavigationController (masterViewController);
				var detailViewController = new DetailViewController ();
				var detailNavigationController = new UINavigationController (detailViewController);
				
				splitViewController = new UISplitViewController ();
				splitViewController.WeakDelegate = detailViewController;
				splitViewController.ViewControllers = new UIViewController[] {
					masterNavigationController,
					detailNavigationController
				};
				
				window.RootViewController = splitViewController;
			}

			// make the window visible
			window.MakeKeyAndVisible ();
			
			return true;
		}