public static void DisposeEx(this UIView view, bool disposeView = true)
{
try {
var viewDescription = string.Empty;
var disconnectFromSuperView = true;
var disposeSubviews = true;
var removeGestureRecognizers = false; // WARNING: enable at your own risk, may causes crashes
var removeLayerAnimations = true;
var associatedViewsToDispose = new List <UIView>();
var otherDisposables = new List <IDisposable>();
if (view is UIActivityIndicatorView)
{
var aiv = (UIActivityIndicatorView)view;
if (aiv.IsAnimating)
{
aiv.StopAnimating();
}
}
else if (view is UITableView)
{
var tableView = (UITableView)view;
if (tableView.DataSource != null)
{
otherDisposables.Add(tableView.DataSource);
}
if (tableView.BackgroundView != null)
{
associatedViewsToDispose.Add(tableView.BackgroundView);
}
tableView.Source = null;
tableView.Delegate = null;
tableView.DataSource = null;
tableView.WeakDelegate = null;
tableView.WeakDataSource = null;
associatedViewsToDispose.AddRange(tableView.VisibleCells ?? new UITableViewCell[0]);
}
else if (view is UITableViewCell)
{
var tableViewCell = (UITableViewCell)view;
disposeView = false;
disconnectFromSuperView = false;
if (tableViewCell.ImageView != null)
{
associatedViewsToDispose.Add(tableViewCell.ImageView);
}
}
else if (view is UICollectionView)
{
var collectionView = (UICollectionView)view;
disposeView = false;
if (collectionView.DataSource != null)
{
otherDisposables.Add(collectionView.DataSource);
}
associatedViewsToDispose.Add(collectionView.BackgroundView);
//associatedViewsToDispose.AddRange(collectionView.VisibleCells ?? new UICollectionViewCell[0]);
collectionView.Source = null;
collectionView.Delegate = null;
collectionView.DataSource = null;
collectionView.WeakDelegate = null;
collectionView.WeakDataSource = null;
}
else if (view is UICollectionViewCell)
{
var collectionViewCell = (UICollectionViewCell)view;
disposeView = false;
disconnectFromSuperView = false;
if (collectionViewCell.BackgroundView != null)
{
associatedViewsToDispose.Add(collectionViewCell.BackgroundView);
}
}
else if (view is UIWebView)
{
var webView = (UIWebView)view;
if (webView.IsLoading)
{
webView.StopLoading();
}
webView.LoadHtmlString(string.Empty, null); // clear display
webView.Delegate = null;
webView.WeakDelegate = null;
}
else if (view is UIImageView)
{
var imageView = (UIImageView)view;
if (imageView.Image != null)
{
otherDisposables.Add(imageView.Image);
imageView.Image = null;
}
}
var gestures = view.GestureRecognizers;
if (removeGestureRecognizers && gestures != null)
{
foreach (var gr in gestures)
{
view.RemoveGestureRecognizer(gr);
gr.Dispose();
}
}
if (removeLayerAnimations && view.Layer != null)
{
view.Layer.RemoveAllAnimations();
}
if (disconnectFromSuperView && view.Superview != null)
{
view.RemoveFromSuperview();
}
var constraints = view.Constraints;
if (constraints != null && constraints.Any() && constraints.All(c => c.Handle != IntPtr.Zero))
{
view.RemoveConstraints(constraints);
foreach (var constraint in constraints)
{
constraint.Dispose();
}
}
foreach (var otherDisposable in otherDisposables)
{
otherDisposable.Dispose();
}
foreach (var otherView in associatedViewsToDispose)
{
otherView.DisposeEx();
}
var subViews = view.Subviews;
if (disposeSubviews && subViews != null)
{
foreach (var s in subViews)
{
s.DisposeEx();
}
}
if (disposeView)
{
if (view.Handle != IntPtr.Zero)
{
view.Dispose();
}
}
} catch (Exception error) {
Console.Error.WriteLine(error);
}
}
