/// <summary>
/// 在应用程序由最终用户正常启动时进行调用。
/// 将在启动应用程序以打开特定文件等情况下使用。
/// </summary>
/// <param name="e">有关启动请求和过程的详细信息。</param>
protected override void OnLaunched(LaunchActivatedEventArgs e)
{
#if DEBUG
//if (System.Diagnostics.Debugger.IsAttached)
//{
// this.DebugSettings.EnableFrameRateCounter = true;
//}
#endif
NavigationPage rootPage = Window.Current.Content as NavigationPage;
if(rootPage == null)
{
rootPage = new NavigationPage();
Frame rootFrame = rootPage.FindName("rootFrame") as Frame;
if (rootFrame == null)
{
throw new Exception("Root frame not found");
}
rootFrame.NavigationFailed += OnNavigationFailed;
if (rootFrame.Content == null)
{
rootFrame.Navigate(typeof(MainPage), e.Arguments);
}
Window.Current.Content = rootPage;
SystemNavigationManager.GetForCurrentView().BackRequested += App_BackRequested;
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =AppViewBackButtonVisibility.Visible;
//Windows.UI.ViewManagement.ApplicationView.GetForCurrentView().TryEnterFullScreenMode();
}
//Frame rootFrame = Window.Current.Content as Frame;
//// 不要在窗口已包含内容时重复应用程序初始化，
//// 只需确保窗口处于活动状态
//if (rootFrame == null)
//{
// // 创建要充当导航上下文的框架，并导航到第一页
// rootFrame = new Frame();
// rootFrame.NavigationFailed += OnNavigationFailed;
// if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
// {
// //TODO: 从之前挂起的应用程序加载状态
// }
// // 将框架放在当前窗口中
// Window.Current.Content = rootFrame;
//}
//if (rootFrame.Content == null)
//{
// // 当导航堆栈尚未还原时，导航到第一页，
// // 并通过将所需信息作为导航参数传入来配置
// // 参数
// rootFrame.Navigate(typeof(MainPage), e.Arguments);
//}
//// 确保当前窗口处于活动状态
Window.Current.Activate();
}
public NavigationPage()
{
this.InitializeComponent();
Current = this;
RootFrame = this.rootFrame;
}