public async Task <bool> IsLightOperatingSystemTheme()
{
if (UIDevice.CurrentDevice.CheckSystemVersion(12, 0))
{
UIViewController currentUIViewController = await GetVisibleViewController();
UIUserInterfaceStyle userInterfaceStyle = currentUIViewController.TraitCollection.UserInterfaceStyle;
switch (userInterfaceStyle)
{
case UIUserInterfaceStyle.Light:
return(true);
case UIUserInterfaceStyle.Dark:
return(false);
default:
return(true);
}
}
else
{
return(true);
}
}
public Theme GetOperatingSystemTheme()
{
UIViewController currentUIViewController = GetVisibleViewController();
UIUserInterfaceStyle userInterfaceStyle = currentUIViewController.TraitCollection.UserInterfaceStyle;
return(userInterfaceStyle switch
{
UIUserInterfaceStyle.Light => Theme.Light,
UIUserInterfaceStyle.Dark => Theme.Dark,
_ => throw new NotSupportedException($"UIUserInterfaceStyle {userInterfaceStyle} not supported"),
});
void SetOverrideUserInterfaceStyle(string themeName)
{
if (Control == null || !UIDevice.CurrentDevice.CheckSystemVersion(12, 0))
{
return;
}
UIUserInterfaceStyle userInterfaceStyle = themeName == "Light" ? UIUserInterfaceStyle.Light : UIUserInterfaceStyle.Dark;
if (UIDevice.CurrentDevice.CheckSystemVersion(13, 0))
{
Control.OverrideUserInterfaceStyle = userInterfaceStyle;
}
}