void UpdateCell(ViewCell cell)
{
if (_viewCell != null)
{
Device.BeginInvokeOnMainThread(_viewCell.SendDisappearing);
}
_viewCell = cell;
Device.BeginInvokeOnMainThread(_viewCell.SendAppearing);
IVisualElementRenderer renderer;
if (_rendererRef == null || !_rendererRef.TryGetTarget(out renderer))
{
renderer = GetNewRenderer();
}
else
{
if (renderer.Element != null && renderer == Platform.GetRenderer(renderer.Element))
{
renderer.Element.ClearValue(Platform.RendererProperty);
}
var type = Internals.Registrar.Registered.GetHandlerTypeForObject(_viewCell.View);
var reflectableType = renderer as System.Reflection.IReflectableType;
var rendererType = reflectableType != null?reflectableType.GetTypeInfo().AsType() : renderer.GetType();
if (rendererType == type || (renderer is DefaultRenderer && type == null))
{
renderer.SetElement(_viewCell.View);
}
else
{
//when cells are getting reused the element could be already set to another cell
//so we should dispose based on the renderer and not the renderer.Element
Platform.DisposeRendererAndChildren(renderer);
renderer = GetNewRenderer();
}
}
Platform.SetRenderer(_viewCell.View, renderer);
}
void UpdateCell(ViewCell cell)
{
ICellController cellController = _viewCell;
if (cellController != null)
{
Device.BeginInvokeOnMainThread(cellController.SendDisappearing);
}
_viewCell = cell;
cellController = cell;
Device.BeginInvokeOnMainThread(cellController.SendAppearing);
IVisualElementRenderer renderer;
if (_rendererRef == null || !_rendererRef.TryGetTarget(out renderer))
{
renderer = GetNewRenderer();
}
else
{
if (renderer.Element != null && renderer == Platform.GetRenderer(renderer.Element))
{
renderer.Element.ClearValue(Platform.RendererProperty);
}
var type = Registrar.Registered.GetHandlerType(_viewCell.View.GetType());
if (renderer.GetType() == type || (renderer is DefaultRenderer && type == null))
{
renderer.SetElement(_viewCell.View);
}
else
{
//when cells are getting reused the element could be already set to another cell
//so we should dispose based on the renderer and not the renderer.Element
Platform.DisposeRendererAndChildren(renderer);
renderer = GetNewRenderer();
}
}
Platform.SetRenderer(_viewCell.View, renderer);
}
async Task <bool> PopPageAsync(Page page, bool animated)
{
if (page == null)
{
throw new ArgumentNullException(nameof(page));
}
var wrapper = _currentStack.Peek();
if (page != wrapper.Page)
{
throw new NotSupportedException("Popped page does not appear on top of current navigation stack, please file a bug.");
}
_currentStack.Pop();
page.SendDisappearing();
var target = Platform.GetRenderer(page);
var previousPage = _currentStack.Peek().Page;
if (animated)
{
var previousPageRenderer = Platform.GetRenderer(previousPage);
var transitionStyle = NavigationPage.OnThisPlatform().GetNavigationTransitionPopStyle();
return(await this.HandleAsyncAnimation(target.ViewController, previousPageRenderer.ViewController,
ToViewControllerTransitionOptions(transitionStyle), () => Platform.DisposeRendererAndChildren(target), true));
}
RemovePage(page, false);
return(true);
}