Question

我有3页。第A，B和C页。

情况如下：

在所有3个屏幕上，我使用一个对象e。 G。 Car。那些到按钮意味着如果我点击这样一个按钮，我将通过Frame.Navigate(typeof(...), Car)传递Car引用导航到该页面。在后退按钮按下我想回去而不传递任何参数。

问题是当我按到C 然后到B e。 G。 5次，然后当从页面B通过后退按钮导航时，它就像这样。 C - ＆gt; B - ＆gt; C - ＆gt; B - ＆gt; C - ＆gt; B - ＆gt; C - ＆gt; B - ＆gt;甲

我的问题是：有没有办法不向后退按钮堆栈添加导航？所以它只有一种方式C - ＆gt; B - ＆gt; A，或B - > A或C - > B.

我的App.xaml.cs

protected override void OnLaunched(LaunchActivatedEventArgs e) {

    Frame rootFrame = Window.Current.Content as Frame;

    // Do not repeat app initialization when the Window already has content,
    // just ensure that the window is active
    if (rootFrame == null)
    {
        // Create a Frame to act as the navigation context and navigate to the first page
        rootFrame = new Frame();

        rootFrame.NavigationFailed += OnNavigationFailed;
        rootFrame.Navigated += OnNavigated;

        if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
        {
            //TODO: Load state from previously suspended application
        }

        // Place the frame in the current Window
        Window.Current.Content = rootFrame;

        // Register a handler for BackRequested events and set the
        // visibility of the Back button
        SystemNavigationManager.GetForCurrentView().BackRequested += OnBackRequested;

        SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =
            rootFrame.CanGoBack ?
            AppViewBackButtonVisibility.Visible :
            AppViewBackButtonVisibility.Collapsed;
    }

    if (rootFrame.Content == null)
    {
        // When the navigation stack isn't restored navigate to the first page,
        // configuring the new page by passing required information as a navigation
        // parameter
        rootFrame.Navigate(typeof(MainPage), e.Arguments);
    }
    // Ensure the current window is active
    Window.Current.Activate();
}

    private void OnNavigated(object sender, NavigationEventArgs e) {
        // Each time a navigation event occurs, update the Back button's visibility
        SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =
            ((Frame)sender).CanGoBack ?
            AppViewBackButtonVisibility.Visible :
            AppViewBackButtonVisibility.Collapsed;
    }


private void OnBackRequested(object sender, BackRequestedEventArgs e) {
    Frame rootFrame = Window.Current.Content as Frame;

    if (rootFrame.CanGoBack) {
        e.Handled = true;
        rootFrame.GoBack();
    }
}

提前谢谢。

Answer 1

基本上你不想在<script type="text/javascript"> $(document).ready(function(){ countnumber(0,40,"stat1",50); function countnumber(start,end,idtarget,duration){ cc=setInterval(function(){ if(start==end) { $("#"+idtarget).html(start); clearInterval(cc); } else { $("#"+idtarget).html(start); start++; } },duration); } }); </script> <span id="span1"></span>中重复。这是导航发生时你可以做的事情。

BackStack

Answer 2

实际上，your answer给了我如何解决它的想法。我刚刚修改了一些代码。

if (this.Frame.BackStackDepth > 1) {
    var firstItem = this.Frame.BackStack.Distinct().ToList().First();
    this.Frame.BackStack.Clear();
    this.Frame.BackStack.Add(firstItem);
}

我只检索后面堆栈中的第一个不同项，然后我只将这一项设置为堆栈跟踪。

UWP - 从后退按钮堆栈排除导航

2 个答案: