library from : https://github.com/zhanglinfeng/LFKit.
The badge lib is a sub lib of LFKit.
partial void UIButton197_TouchUpInside(UIButton sender)
{
BadgeView.iOS.LFBadge badge = new BadgeView.iOS.LFBadge();
badge.Count = "12";
badge.NeedDisappearEffects = true;
badge.ClearBlock = new Action(()=> { });
badge.AddToView(sender);
}the function 'drag to dismiss' works well only when 'ClearBlock' has value.