void EnsureLayoutInitialized()
{
if (_initialized)
{
return;
}
if (!ItemsView.IsVisible)
{
// If the CollectionView starts out invisible, we'll get a layout pass with a size of 1,1 and everything will
// go pear-shaped. So until the first time this CollectionView is visible, we do nothing.
return;
}
_initialized = true;
ItemsViewLayout.GetPrototype = GetPrototype;
Delegator = CreateDelegator();
CollectionView.Delegate = Delegator;
ItemsViewLayout.SetInitialConstraints(CollectionView.Bounds.Size);
CollectionView.SetCollectionViewLayout(ItemsViewLayout, false);
UpdateEmptyView();
}
public override void ViewWillLayoutSubviews()
{
base.ViewWillLayoutSubviews();
// We can't set this constraint up on ViewDidLoad, because Forms does other stuff that resizes the view
// and we end up with massive layout errors. And View[Will/Did]Appear do not fire for this controller
// reliably. So until one of those options is cleared up, we set this flag so that the initial constraints
// are set up the first time this method is called.
if (!_initialConstraintsSet)
{
ItemsViewLayout.SetInitialConstraints(CollectionView.Bounds.Size);
UpdateEmptyView();
_initialConstraintsSet = true;
}
else
{
LayoutEmptyView();
}
}
void EnsureLayoutInitialized()
{
if (_initialized)
{
return;
}
_initialized = true;
ItemsViewLayout.GetPrototype = GetPrototype;
Delegator = CreateDelegator();
CollectionView.Delegate = Delegator;
ItemsViewLayout.SetInitialConstraints(CollectionView.Bounds.Size);
CollectionView.SetCollectionViewLayout(ItemsViewLayout, false);
UpdateEmptyView();
}