protected override void OnElementChanged(ElementChangedEventArgs<Button> e)
{
base.OnElementChanged(e);
if ((Control != null) && (e.NewElement != null))
{
Control.Tag = ((RoundButton)e.NewElement).Tag;
Control.TouchUpInside += (sender, ev) =>
{
var responder = InputTools.FindFirstResponder(UIApplication.SharedApplication.KeyWindow.RootViewController.View);
if (responder != null)
responder.ResignFirstResponder();
};
}
}
private void OnKeyboardNotification(NSNotification notification)
{
float neededOffset = 0;
var visible = notification.Name == UIKeyboard.WillShowNotification;
var keyboardFrame = visible ? UIKeyboard.FrameEndFromNotification(notification) : UIKeyboard.FrameBeginFromNotification(notification);
if (visible)
{
KeyboardShown?.Invoke(this, (float)keyboardFrame.Height);
}
var parentView = UIApplication.SharedApplication.KeyWindow.RootViewController.View;
bool isSubview = false;
var responder = InputTools.FindFirstResponder(parentView);
if ((responder == null) && (UIApplication.SharedApplication.KeyWindow.Subviews != null))
{
foreach (var subview in UIApplication.SharedApplication.KeyWindow.Subviews)
{
responder = InputTools.FindFirstResponder(subview);
if (responder != null)
{
parentView = subview;
isSubview = true;
break;
}
}
}
if (responder != null)
{
var offsetFromBottom = getOffsetFromBottom(responder);
if (responder.Tag > 0)
{
var views = getTaggedViews(parentView, responder.Tag);
if (views.Any())
{
var offsets = new List <nfloat>();
foreach (var view in views)
{
offsets.Add(getOffsetFromBottom(view));
}
offsetFromBottom = offsets.Min();
}
}
if (keyboardFrame.Height > offsetFromBottom)
{
neededOffset = (float)(keyboardFrame.Height - offsetFromBottom + responder.Frame.Height);
}
}
if ((KeyboardChanged != null) && ((neededOffset > 0) || !visible))
{
if (isSubview)
{
parentView.Transform = CoreGraphics.CGAffineTransform.MakeTranslation(0, -neededOffset);
}
else
{
KeyboardChanged(this, new KeyboardHelperEventArgs(visible, (float)keyboardFrame.Height, neededOffset));
}
}
}
