protected virtual void UpdateHeaderVisibility()
{
bool visible = ShellSectionController.GetItems().Count > 1;
if (visible)
{
if (_header == null)
{
_header = CreateShellSectionRootHeader(_shellContext);
_header.ShellSection = ShellSection;
AddChildViewController(_header.ViewController);
View.AddSubview(_header.ViewController.View);
}
_blurView.Hidden = false;
LayoutHeader();
}
else
{
if (_header != null)
{
_header.ViewController.View.RemoveFromSuperview();
_header.ViewController.RemoveFromParentViewController();
_header.Dispose();
_header = null;
}
_blurView.Hidden = true;
}
}
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
if (disposing && ShellSection != null)
{
ShellSection.PropertyChanged -= OnShellSectionPropertyChanged;
ShellSectionController.ItemsCollectionChanged -= OnShellSectionItemsChanged;
_header?.Dispose();
_tracker?.Dispose();
foreach (var shellContent in ShellSectionController.GetItems())
{
if (_renderers.TryGetValue(shellContent, out var oldRenderer))
{
_renderers.Remove(shellContent);
oldRenderer.NativeView.RemoveFromSuperview();
oldRenderer.ViewController.RemoveFromParentViewController();
var element = oldRenderer.Element;
oldRenderer.Dispose();
element?.ClearValue(Platform.RendererProperty);
}
}
}
ShellSection = null;
_header = null;
_tracker = null;
}
protected override void Dispose(bool disposing)
{
if (_isDisposed)
{
return;
}
if (disposing && ShellSection != null)
{
ShellSection.PropertyChanged -= OnShellSectionPropertyChanged;
ShellSectionController.ItemsCollectionChanged -= OnShellSectionItemsChanged;
this.RemoveFromParentViewController();
_header?.Dispose();
_tracker?.Dispose();
foreach (var renderer in _renderers)
{
var oldRenderer = renderer.Value;
if (oldRenderer.NativeView != null)
{
oldRenderer.NativeView.RemoveFromSuperview();
}
if (oldRenderer.ViewController != null)
{
oldRenderer.ViewController.RemoveFromParentViewController();
}
var element = oldRenderer.Element;
oldRenderer.Dispose();
element?.ClearValue(Platform.RendererProperty);
}
_renderers.Clear();
}
if (disposing)
{
_shellContext.Shell.PropertyChanged -= HandleShellPropertyChanged;
}
_shellContext = null;
ShellSection = null;
_header = null;
_tracker = null;
_currentContent = null;
_isDisposed = true;
}
protected override void Dispose(bool disposing)
{
if (_isDisposed)
{
return;
}
if (disposing && ShellSection != null)
{
(this as IDisconnectable).Disconnect();
this.RemoveFromParentViewController();
_header?.Dispose();
_tracker?.Dispose();
foreach (var renderer in _renderers)
{
var oldRenderer = renderer.Value;
if (oldRenderer.PlatformView != null)
{
oldRenderer.PlatformView.RemoveFromSuperview();
}
if (oldRenderer.ViewController != null)
{
oldRenderer.ViewController.RemoveFromParentViewController();
}
var element = oldRenderer.VirtualView;
oldRenderer?.DisconnectHandler();
}
_renderers.Clear();
}
if (disposing)
{
_shellContext.Shell.PropertyChanged -= HandleShellPropertyChanged;
}
_shellContext = null;
ShellSection = null;
_header = null;
_tracker = null;
_currentContent = null;
_isDisposed = true;
}