//切换深色主题开关
private void DarkThemeToggleSwitch_Toggled(object sender, RoutedEventArgs e)
{
ToggleSwitch toggleSwitch = sender as ToggleSwitch;
if (toggleSwitch != null)
{
if (toggleSwitch.IsOn)
{
ThemeUtils.ChangeToDarkTheme();
}
else
{
ThemeUtils.ChangeToLightTheme();
}
((Window.Current.Content as Frame).Content as MainPage).OnChangeTheme();
}
}