我正在尝试为Windows Phone 8实施快速应用简历。我跟着the link at MSDN。
以下是XAML中的代码：
<Tasks>
<DefaultTask Name="_default" NavigationPage="MainPage.xaml" ActivationPolicy="Resume"/>
</Tasks>
这是app.xaml.cs中的代码
public static PhoneApplicationFrame RootFrame { get; private set; }
bool wasRelaunched = false;
bool mustClearPagestack = false;
IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;
enum SessionType
{
None,
Home,
DeepLink
}
private SessionType sessionType = SessionType.None;
public App()
{
UnhandledException += Application_UnhandledException;
InitializeComponent();
InitializePhoneApplication();
InitializeLanguage();
if (Debugger.IsAttached)
{
Application.Current.Host.Settings.EnableFrameRateCounter =true;
PhoneApplicationService.Current.UserIdleDetectionMode = IdleDetectionMode.Disabled;
}
}
private void Application_Launching(object sender, LaunchingEventArgs e)
{
RemoveCurrentDeactivationSettings();
}
private void Application_Activated(object sender, ActivatedEventArgs e)
{
mustClearPagestack = CheckDeactivationTimeStamp();
if (!e.IsApplicationInstancePreserved)
{
RestoreSessionType();
}
}
private void Application_Deactivated(object sender, DeactivatedEventArgs e)
{
SaveCurrentDeactivationSettings();
}
private void Application_Closing(object sender, ClosingEventArgs e)
{
RemoveCurrentDeactivationSettings();
}
private void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
{
if (Debugger.IsAttached)
{
Debugger.Break();
}
}
private void Application_UnhandledException(object sender,ApplicationUnhandledExceptionEventArgs e)
{
if (Debugger.IsAttached)
{
Debugger.Break();
}
}
private bool phoneApplicationInitialized = false;
private void InitializePhoneApplication()
{
if (phoneApplicationInitialized)
return;
RootFrame= new PhoneApplicationFrame();
RootFrame.Background = new SolidColorBrush(Color.FromArgb(255, 27, 200, 174));
RootFrame.Navigated += CompleteInitializePhoneApplication;
RootFrame.NavigationFailed += RootFrame_NavigationFailed;
RootFrame.Navigated += CheckForResetNavigation;
RootFrame.Navigating += RootFrame_Navigating;
phoneApplicationInitialized = true;
}
void RootFrame_Navigating(object sender, NavigatingCancelEventArgs e)
{
if (e.Uri.ToString().Contains(@"/MainPage.xaml") == true && !AppPrefManager.Instance.IsFastAppResumeEnabled)
{
RootFrame.Dispatcher.BeginInvoke(delegate
{
if (!AppPrefManager.Instance.IsVirginLaunchCompleted)
{
RootFrame.Navigate(new Uri(Constants.kIntroPage, UriKind.Relative));
}
else
{
RootFrame.Navigate(new Uri(Constants.kMainPage, UriKind.Relative));
}
});
e.Cancel = true;
}
if (sessionType == SessionType.None && e.NavigationMode == NavigationMode.New)
{
if (e.Uri.ToString().Contains("DeepLink=true"))
{
sessionType = SessionType.DeepLink;
}
else if (e.Uri.ToString().Contains("/MainPage.xaml"))
{
sessionType = SessionType.Home;
}
}
if (e.NavigationMode == NavigationMode.Reset)
{
wasRelaunched = true;
}
else if (e.NavigationMode == NavigationMode.New && wasRelaunched)
{
wasRelaunched = false;
if (e.Uri.ToString().Contains("DeepLink=true"))
{
sessionType = SessionType.DeepLink;
}
else if (e.Uri.ToString().Contains("/MainPage.xaml"))
{
if (sessionType == SessionType.DeepLink)
{
sessionType = SessionType.Home;
}
else
{
if (!mustClearPagestack)
{
e.Cancel = true;
RootFrame.Navigated -= ClearBackStackAfterReset;
}
}
}
mustClearPagestack = false;
}
}
private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
{
if (RootVisual != RootFrame)
RootVisual = RootFrame;
RootFrame.Navigated -= CompleteInitializePhoneApplication;
}
private void CheckForResetNavigation(object sender, NavigationEventArgs e)
{
if (e.NavigationMode == NavigationMode.Reset)
RootFrame.Navigated += ClearBackStackAfterReset;
}
private void ClearBackStackAfterReset(object sender, NavigationEventArgs e)
{
RootFrame.Navigated -= ClearBackStackAfterReset;
if (e.NavigationMode != NavigationMode.New && e.NavigationMode != NavigationMode.Refresh)
return;
while (RootFrame.RemoveBackEntry() != null)
{
;
}
}
private void InitializeLanguage()
{
try
{
FlowDirection flow = (FlowDirection)Enum.Parse(typeof(FlowDirection), AppResources.ResourceFlowDirection);
RootFrame.FlowDirection = flow;
}
catch
{
if (Debugger.IsAttached)
{
Debugger.Break();
}
throw;
}
}
bool CheckDeactivationTimeStamp()
{
DateTimeOffset lastDeactivated;
if (settings.Contains("DeactivateTime"))
{
lastDeactivated = (DateTimeOffset)settings["DeactivateTime"];
}
var currentDuration = DateTimeOffset.Now.Subtract(lastDeactivated);
return TimeSpan.FromSeconds(currentDuration.TotalSeconds) > TimeSpan.FromSeconds(30);
}
public bool AddOrUpdateValue(string Key, Object value)
{
bool valueChanged = false;
if (settings.Contains(Key))
{
if (settings[Key] != value)
{
settings[Key] = value;
valueChanged = true;
}
}
else
{
settings.Add(Key, value);
valueChanged = true;
}
return valueChanged;
}
public void RemoveValue(string Key)
{
if (settings.Contains(Key))
{
settings.Remove(Key);
}
}
public void SaveCurrentDeactivationSettings()
{
if (AddOrUpdateValue("DeactivateTime", DateTimeOffset.Now))
{
settings.Save();
}
if (AddOrUpdateValue("SessionType", sessionType))
{
settings.Save();
}
}
public void RemoveCurrentDeactivationSettings()
{
RemoveValue("DeactivateTime");
RemoveValue("SessionType");
settings.Save();
}
void RestoreSessionType()
{
if (settings.Contains("SessionType"))
{
sessionType = (SessionType)settings["SessionType"];
}
}
假设我在ThirdPage中。我按下Windows按钮。然后我从开始屏幕按我的应用程序图标。而不是从第三页恢复应用程序。它首先显示ThirdPage，然后从MainPage开始。
答案 0 :(得分：1)
默认情况下，当应用程序通过应用磁贴启动时，应用仍然会导航到默认页面。 如果您愿意，可以在RootFrame_Navigated方法中检查会话类型并取消该导航。
默认模板在app.xaml.cs中添加了一个 CheckNavigation 方法，该方法在使用NavigationMode 重置导航后清除了后台堆栈。
您可以在那里查看，您的应用应该留在最后一页，还是最好重置并重新开始。
可以在此处找到处理不同激活类型的示例： MSDN Fast Resume Sample, App.xaml.cs
（方法：RootFrame_Navigated）
答案 1 :(得分：0)
列出的代码会搞砸。它与评论不符。 查看RootFrame_Navigating - 底部的mustClearPagesStack设置为false - 但查看原始MSDN链接中的注释 - 它上面的两个位置表示必须清除页面堆栈....但是因为该标志设置为false所以它是混乱的起来。因此，在顶部将标志设置为false，但是在它所说的两个“if conditions”中将其设置为true。 然后它会像冠军一样工作。