public void Rotate()
{
CASpringAnimation rotationAnimation = new CASpringAnimation();
rotationAnimation.KeyPath = "transform.rotation.z";
rotationAnimation.RepeatCount = 1;
rotationAnimation.InitialVelocity = 5;
rotationAnimation.Mass = 1.5f;
rotationAnimation.RemovedOnCompletion = false;
rotationAnimation.FillMode = CAFillMode.Forwards;
if (upsideDown)
{
rotationAnimation.From = new NSNumber(Math.PI);
rotationAnimation.To = new NSNumber(Math.PI * 2);
}
else
{
rotationAnimation.From = new NSNumber(0);
rotationAnimation.To = new NSNumber(Math.PI);
}
rotationAnimation.Duration = rotationAnimation.SettlingDuration;
Layer.AddAnimation(rotationAnimation, nameof(rotationAnimation));
upsideDown = !upsideDown;
}
public override void AnimateTransition(IUIViewControllerContextTransitioning transitionContext)
{
var toViewController = transitionContext.GetViewControllerForKey(UITransitionContext.ToViewControllerKey);
var containerView = transitionContext.ContainerView;
var animationDuration = TransitionDuration(transitionContext);
var animation = (CASpringAnimation)CASpringAnimation.FromKeyPath("position.y");
animation.Damping = 10;
animation.InitialVelocity = 20;
animation.Mass = 1;
animation.Stiffness = 100;
animation.From = FromObject(containerView.Bounds.Height);
animation.To = FromObject(UIScreen.MainScreen.Bounds.Height / 2);
animation.Duration = TransitionDuration(transitionContext);
animation.AnimationStopped += delegate
{
transitionContext.CompleteTransition(true);
};
toViewController.View.Layer.AddAnimation(animation, null);
containerView.AddSubview(toViewController.View);
}
