protected override void Dispose(bool disposing)
{
if (disposing)
{
MessagingCenter.Unsubscribe <IVisualElementRenderer>(this, UpdateToolbarButtons);
foreach (var childViewController in ViewControllers)
{
childViewController.Dispose();
}
if (_tracker != null)
{
_tracker.Dispose();
}
_secondaryToolbar.RemoveFromSuperview();
_secondaryToolbar.Dispose();
_secondaryToolbar = null;
_parentMasterDetailPage = null;
Current = null; // unhooks events
var navPage = (NavigationPage)Element;
navPage.PropertyChanged -= HandlePropertyChanged;
var navController = ((INavigationPageController)navPage);
navController.PushRequested -= OnPushRequested;
navController.PopRequested -= OnPopRequested;
navController.PopToRootRequested -= OnPopToRootRequested;
navController.RemovePageRequested -= OnRemovedPageRequested;
navController.InsertPageBeforeRequested -= OnInsertPageBeforeRequested;
}
base.Dispose(disposing);
if (_appeared)
{
((Page)Element).SendDisappearing();
_appeared = false;
}
}
