public async Task <bool> CloseDrawerAsync()
{
TapGestureRecognizer.Enabled = false;
var finished = await UIView.AnimateNotifyAsync(0.2, () => {
TopView.Frame = TopViewFrame;
});
DrawerTransitioning?.Invoke(this, new DrawerTransitioningEventArgs(DrawerTransitioningState.Closed));
updateStatusBarAppearance();
return(finished);
}
public async override void AnimateTransition(IUIViewControllerContextTransitioning transitionContext)
{
UIViewController fromVC = transitionContext.GetViewControllerForKey(UITransitionContext.FromViewControllerKey);
UIView fromView = fromVC.View;
UIViewController toVC = transitionContext.GetViewControllerForKey(UITransitionContext.ToViewControllerKey);
UIView toView = toVC.View;
UIView containerView = transitionContext.ContainerView;
if (IsPresentation)
{
containerView.AddSubview(toView);
}
UIViewController animatingVC = IsPresentation ? toVC : fromVC;
UIView animatingView = animatingVC.View;
CGRect appearedFrame = transitionContext.GetFinalFrameForViewController(animatingVC);
CGRect dismissedFrame = appearedFrame;
CGPoint targetLacation = dismissedFrame.Location;
targetLacation.X += dismissedFrame.Size.Width;
dismissedFrame.Location = targetLacation;
CGRect initialFrame = IsPresentation ? dismissedFrame : appearedFrame;
CGRect finalFrame = IsPresentation ? appearedFrame : dismissedFrame;
animatingView.Frame = initialFrame;
UIViewAnimationOptions opt = UIViewAnimationOptions.AllowUserInteraction
| UIViewAnimationOptions.BeginFromCurrentState;
await UIView.AnimateNotifyAsync(TransitionDuration (transitionContext), 0, 300, 5, opt, () => {
animatingView.Frame = finalFrame;
});
if (!IsPresentation)
{
fromView.RemoveFromSuperview();
}
transitionContext.CompleteTransition(true);
}
public async override void AnimateTransition(IUIViewControllerContextTransitioning transitionContext)
{
UIViewController fromVC = transitionContext.GetViewControllerForKey(UITransitionContext.FromViewControllerKey);
UIView fromView = fromVC.View;
UIViewController toVC = transitionContext.GetViewControllerForKey(UITransitionContext.ToViewControllerKey);
UIView toView = toVC.View;
UIView containerView = transitionContext.ContainerView;
if (IsPresentation)
{
containerView.AddSubview(toView);
}
UIViewController animatingVC = IsPresentation? toVC : fromVC;
UIView animatingView = animatingVC.View;
animatingView.Frame = transitionContext.GetFinalFrameForViewController(animatingVC);
CGAffineTransform presentedTransform = CGAffineTransform.MakeIdentity();
CGAffineTransform dismissedTransform = CGAffineTransform.MakeScale(0.001f, 0.001f) * CGAffineTransform.MakeRotation(8 * (float)Math.PI);
animatingView.Transform = IsPresentation ? dismissedTransform : presentedTransform;
var opt = UIViewAnimationOptions.AllowUserInteraction | UIViewAnimationOptions.BeginFromCurrentState;
await UIView.AnimateNotifyAsync(TransitionDuration (transitionContext), 0, 300, 5, opt, () => {
animatingView.Transform = IsPresentation ? presentedTransform : dismissedTransform;
});
animatingView.Transform = CGAffineTransform.MakeIdentity();
if (!IsPresentation)
{
fromView.RemoveFromSuperview();
}
transitionContext.CompleteTransition(true);
}
public async Task ReplaceViewControllerAsync(UIViewController newViewController, ITransitionAnimation transition)
{
var oldViewController = TopViewController;
oldViewController?.WillMoveToParentViewController(null);
AddChildViewController(newViewController);
transition.WillTransition(this, newViewController);
View.AddSubview(newViewController.View);
await UIView.AnimateNotifyAsync(transition.Duration,
0.0f,
transition.SpringDampingRatio,
transition.InitialSprintVelocity,
UIViewAnimationOptions.CurveEaseInOut,
() => transition.Transition(this, oldViewController, newViewController));
transition.DidTransition(this, oldViewController, newViewController);
oldViewController?.View.RemoveFromSuperview();
oldViewController?.RemoveFromParentViewController();
newViewController.DidMoveToParentViewController(this);
TopViewController = newViewController;
}