如何在“设置”按钮上打开当前页面

Question

如何在Settings_CommandsRequested上获取当前页面或框架？ 我想从设置窗格导航。

Answer 1

当前Frame是您正在展示的那个，因此您可以定义如何访问它。您可以将实例引用保存为App类上的静态字段，也可以使用IoC容器来访问它。最简单的方法是对App类进行以下更新：

sealed partial class App : Application
{
    public static Frame RootFrame { get; private set; }

    ...

    protected override void OnLaunched(LaunchActivatedEventArgs args)
    {
        Frame rootFrame = this.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 = this.RootFrame = new Frame();
            ...

然后，您只需致电App.RootFrame即可获得您的相框。