/// <summary>
        ///     Invoked when the application is launched normally by the end user.  Other entry points
        ///     will be used such as when the application is launched to open a specific file.
        /// </summary>
        /// <param name="e">Details about the launch request and process.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs e)
        {
#if DEBUG
            if (Debugger.IsAttached)
            {
                DebugSettings.EnableFrameRateCounter = true;
            }
#endif
            var 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)
            {
                // Init a Frame to act as the navigation context and navigate to the first page
                rootFrame = new Frame();

                rootFrame.NavigationFailed += OnNavigationFailed;

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

                //  Display an extended splash screen if app was not previously running.
                if (e.PreviousExecutionState != ApplicationExecutionState.Running)
                {
                    var extendedSplash = new SplashPage(e.SplashScreen);
                    rootFrame.Content      = extendedSplash;
                    Window.Current.Content = rootFrame;
                }

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

            if (e.PrelaunchActivated)
            {
                return;
            }
            if (rootFrame.Content == null)
            {
                rootFrame.Navigate(typeof(MainPage), e.Arguments);
            }
            // Ensure the current window is active
            Window.Current.Activate();

            // 设置透明TitleBar
            TitleBarHelper.SetTransparentTitleBar();
        }