ios - Xamarin iOS : Unable to start new ViewController by tapping on remote notifications

Question

我在 iOS 上工作，实现了 FCM 远程通知。当我点击通知时(当应用程序打开时)它没有启动另一个屏幕。请参阅下面我正在使用的代码。

我在这里打开 ChildrenViewController 当应用启动时点击它

public override bool FinishedLaunching(UIApplication application, NSDictionary launchOptions)
        {  

            Window = new UIWindow(UIScreen.MainScreen.Bounds);
            UIApplication.SharedApplication.StatusBarStyle = UIStatusBarStyle.LightContent;

                 var cvc = new ChildrenViewController();
                 cvc.childs = SISConst.Mychildren;
                 this.navCntl = new UINavigationController(cvc);
                 this.navCntl.NavigationBarHidden = true;
                 Window.MakeKeyAndVisible();
                 SetRootViewController(this.navCntl, false);
         }

public void SetRootViewController(UIViewController rootViewController, bool animate)
        {
            if (animate)
            {
                var transitionType = UIViewAnimationOptions.TransitionFlipFromRight;
                if (Window == null)
                {
                    Window = new UIWindow(UIScreen.MainScreen.Bounds);
                }
                Window.RootViewController = rootViewController;
                UIView.Transition(Window, 0.5, transitionType,
                                  () => Window.RootViewController = rootViewController,
                                  null);
            }
            else
            {
                Window.RootViewController = rootViewController;
            }
        }

在通知点击时，我正在使用单独的嵌套类 CustomUNUserNotificationCenterDelegate，它不会使用更新的数据启动 ChildrenViewController

     public class CustomUNUserNotificationCenterDelegate : UNUserNotificationCenterDelegate
        {
            public override void DidReceiveNotificationResponse(UNUserNotificationCenter center, UNNotificationResponse response, Action completionHandler)
                    {
                        completionHandler();
                        var cvc = new ChildrenViewController();
                        cvc.studentId=studentId;
                        cvc.moduleName = moduleName;
                        cvc.isPush = true;
                        //var nv = new UINavigationController();
                        var appdelegate=UIApplication.SharedApplication.Delegate as AppDelegate;               
                        //appdelegate.Window.RootViewController = nv; 
                        var nv = appdelegate.Window.RootViewController as UINavigationController;                      
                        nv.PushViewController(cvc, false);         
                    }
        }

ChildrenViewController 的

ViewDidLoad() 我在这里检查应用程序是通过点击启动还是通过点击通知启动，以便我分配不同的数据

public override void ViewDidLoad()
{
    base.ViewDidLoad();
    this.ShowStatusBarWithWhiteBg();
    this.DesignScreenTitleAs("");
    this.DesignLogoAppTitle();

    this.AutomaticallyAdjustsScrollViewInsets = false;

    if (isPushNotification)
    {            
        ShowDashboardScreen();
    }
    else
    {             
        ShowChilds();
    }
}

Answer 1

在委托(delegate)方法DidReceiveNotificationResponse中，看一下代码，

var nv = new UINavigationController();
nv.PushViewController(cvc, false); 

您在这里所做的是，您正在创建一个新的导航 Controller 并尝试将 subview Controller 推送到这个新创建的导航 Controller 堆栈。这里的问题是，您在此处创建的导航 Controller 未设置为窗口的 Root View Controller 。

你可以做的是，将这个新创建的导航 VC 设置为你的 Root View Controller ，如果这是你想要做的，或者获取窗口的 Root View Controller 的引用，正如我从你的代码中看到的那样，它是一个导航 Controller ，并且尝试将 subview Controller 推到它上面。

希望这对您有所帮助。