public static void AddOrientationChangeListener([NotNull] IOrientationChangeListener listener)
{
Should.NotBeNull(listener, "listener");
lock (OrientationChangeListeners)
{
if (!_hasOrientationChangeSubscriber)
{
UIApplication.Notifications.ObserveDidChangeStatusBarOrientation(DidChangeStatusBarOrientation);
_hasOrientationChangeSubscriber = true;
}
OrientationChangeListeners.Add(ToolkitExtensions.GetWeakReference(listener));
}
}
public static void RemoveOrientationChangeListener(IOrientationChangeListener listener)
{
Should.NotBeNull(listener, "listener");
lock (OrientationChangeListeners)
{
for (int i = 0; i < OrientationChangeListeners.Count; i++)
{
var target = OrientationChangeListeners[i].Target;
if (target == null)
{
OrientationChangeListeners.RemoveAt(i);
--i;
continue;
}
if (ReferenceEquals(target, listener))
{
OrientationChangeListeners.RemoveAt(i);
return;
}
}
}
}
