private async void InitializeMainPage(ApplicationExecutionState previousExecutionState, String arguments)
{
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)
{
mainDispatcher = Window.Current.Dispatcher;
mainViewId = ApplicationView.GetForCurrentView().Id;
// Create a Frame to act as the navigation context and navigate to the first page
rootFrame = new Frame();
// Associate the frame with a SuspensionManager key
SuspensionManager.RegisterFrame(rootFrame, "AppFrame");
if (previousExecutionState == ApplicationExecutionState.Terminated)
{
// Restore the saved session state only when appropriate
try
{
await SuspensionManager.RestoreAsync();
}
catch (SuspensionManagerException)
{
//Something went wrong restoring state.
//Assume there is no state and continue
}
}
// Place the frame in the current Window
Window.Current.Content = rootFrame;
}
if (rootFrame.Content == null || !String.IsNullOrEmpty(arguments))
{
// This is encountered on the first launch of the app. Make sure to call
// DisableShowingMainViewOnActivation before the first call to Window::Activate
var shouldDisable = Windows.Storage.ApplicationData.Current.LocalSettings.Values[App.DISABLE_MAIN_VIEW_KEY];
if (shouldDisable != null && (bool)shouldDisable)
{
ApplicationViewSwitcher.DisableShowingMainViewOnActivation();
}
// When the navigation stack isn't restored or there are launch arguments
// indicating an alternate launch (e.g.: via toast or secondary tile),
// navigate to the appropriate page, configuring the new page by passing required
// information as a navigation parameter
if (!rootFrame.Navigate(typeof(MainPage), arguments))
{
throw new Exception("Failed to create initial page");
}
}
}
private async void btnShow_Click(object sender, RoutedEventArgs e)
{
/*
* CoreApplication.CreateNewView() - 创建一个新的 SecondaryView（只是新建一个 SecondaryView 实例，并不会显示出来）
*/
await CoreApplication.CreateNewView().Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
_secondaryViewHelper = SecondaryViewHelper.CreateForCurrentView();
_secondaryViewHelper.Title = "i am secondary view";
_secondaryViewHelper.StartViewInUse();
var frame = new Frame();
frame.Navigate(typeof(SecondaryViewPage), _secondaryViewHelper);
Window.Current.Content = frame;
Window.Current.Activate();
// 这里通过 ApplicationView.GetForCurrentView() 获取到的是新开窗口的 ApplicationView 对象
ApplicationView secondaryView = ApplicationView.GetForCurrentView();
});
try
{
_secondaryViewHelper.StartViewInUse();
/*
* ApplicationViewSwitcher.TryShowAsStandaloneAsync() - 在当前窗口的相邻位置显示另一个窗口
*/
ApplicationViewSwitcher.DisableShowingMainViewOnActivation();
var viewShown = await ApplicationViewSwitcher.TryShowAsStandaloneAsync
(
_secondaryViewHelper.Id, // 需要显示的 SecondaryView 的窗口 id
ViewSizePreference.Default, // 需要显示的 SecondaryView 的尺寸首选项（经测试，此参数无效）
ApplicationView.GetForCurrentView().Id, // 调用者的窗口 id
ViewSizePreference.Default // 调用者的尺寸首选项（经测试，此参数无效）
);
if (!viewShown)
{
lblMsg.Text = "显示 SecondaryView 失败";
}
_secondaryViewHelper.StopViewInUse();
}
catch (Exception ex)
{
lblMsg.Text = ex.ToString();
}
}
/// <summary>
/// Visually replaces the current view with this view.
/// </summary>
/// <param name="fromView">
/// The view you are switching from.
/// </param>
/// <param name="options">
/// Options for the display transition behaviors.
/// </param>
/// <returns>
/// A <see cref="Task"/> that represents the operation.
/// </returns>
public async Task SwitchAndConsolidateAsync(AppViewInfo fromView, ApplicationViewSwitchingOptions options)
{
// From view MUST be passed
if (fromView == null)
{
throw new ArgumentNullException(nameof(fromView));
}
await dispatcher.RunAsync(CoreDispatcherPriority.Normal, async() =>
{
ApplicationViewSwitcher.DisableShowingMainViewOnActivation();
await ApplicationViewSwitcher.SwitchAsync(this.view.Id, fromView.view.Id, options);
await this.view.TryConsolidateAsync();
});
}
public static async Task TryShowNewWindowAsync(Page content, bool switchToView)
{
var newView = CoreApplication.CreateNewView();
var newViewId = 0;
await newView.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
Window.Current.Content = content;
newViewId = ApplicationView.GetForCurrentView().Id;
});
ApplicationViewSwitcher.DisableShowingMainViewOnActivation();
var viewShown = await ApplicationViewSwitcher.TryShowAsStandaloneAsync(newViewId);
if (switchToView && viewShown)
{
await ApplicationViewSwitcher.SwitchAsync(newViewId);
}
}