protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
if (disposing && ShellSection != null)
{
ShellSection.PropertyChanged -= OnShellSectionPropertyChanged;
((INotifyCollectionChanged)ShellSection.Items).CollectionChanged -= OnShellSectionItemsChanged;
_header?.Dispose();
_tracker?.Dispose();
foreach (var shellContent in ShellSection.Items)
{
if (_renderers.TryGetValue(shellContent, out var oldRenderer))
{
_renderers.Remove(shellContent);
oldRenderer.NativeView.RemoveFromSuperview();
oldRenderer.ViewController.RemoveFromParentViewController();
oldRenderer.Dispose();
}
}
}
ShellSection = null;
_header = null;
_tracker = null;
}
protected virtual void UpdateHeaderVisibility()
{
bool visible = ShellSection.Items.Count > 1;
if (visible)
{
if (_header == null)
{
_header = new ShellSectionRootHeader(_shellContext);
_header.ShellSection = ShellSection;
AddChildViewController(_header);
View.AddSubview(_header.View);
}
_blurView.Hidden = false;
LayoutHeader();
}
else
{
if (_header != null)
{
_header.View.RemoveFromSuperview();
_header.RemoveFromParentViewController();
_header.Dispose();
_header = null;
}
_blurView.Hidden = true;
}
}
