Xamarin Forms Orientation on iPad - xamarin.forms

Question

I have a Universal Xamarin Forms App with a single page wrapped in a NavigationPage:
Current.MainPage = new NavigationPage(new RootPage()
{
BackgroundColor = (Color)Application.Current.Resources["BackgroundColour"]
})
{
BackgroundColor = (Color)Application.Current.Resources["BackgroundColour"],
BarBackgroundColor = (Color)Application.Current.Resources["BackgroundColour"],
Padding = NavigationPaddingForPlatfrom()
};
I've also overridden GetSupportedInterfaceOrientations in AppDelegate and set a break point - however the break point is never hit. When I rotate in the simulator or device, the break point isn't hit. I've also set the Device Orientation in info.plist to Portrait only, however the App still rotates.
Am I missing some configuration point that's needed to control orientation?
I'm using Xamarin Forms 2.4.0.38779.
The end goal is to force a MasterDetail Page into landscape only.

Answer 1

For forcing exact mode this code worked for me:
public MainPage()
{
InitializeComponent();
OnOrientationChanged += OnOrientationChange;
OnOrientationChange(this, new OrientationChangedEventArgs(DeviceOrientation.Landscape));
}
private void OnOrientationChange(object sender, OrientationChangedEventArgs e)
{
IOrientationService orientationService = DependencyService.Get<IOrientationService>();
DeviceOrientation currentOrientation = orientationService.GetCurrentOrientation();
if (currentOrientation != DeviceOrientation.Landscape)
{
orientationService.SetCurrentOrientation(DeviceOrientation.Landscape);
}
}

Answer 2

Have you tried this.
protected override void OnSizeAllocated(double width, double height)
{
base.OnSizeAllocated(width, height);
if (width != this.width || height != this.height)
{
this.width = width;
this.height = height;
if (Width > Height)
{
//your grid
}
else
{
//your grid
}
}
}

Answer 3

After reading a lot of article and forum posts, I came across this:
https://forums.xamarin.com/discussion/79389/how-to-lock-orientation-in-landscape-for-an-ipad-only-app
The last post by JoeRaco references this SO post:
Xcode 7 ERROR ITMS-90474: "Invalid Bundle", can't submit to Apple
Without 'Requires full screen' set to true, GetSupportedInterfaceOrientations was not being called in AppDelegate. Therefore adding the following to the info.plist solved my problem:
<key>UIRequiresFullScreen</key>
<true/>