[See my blog for a full write-up of this Xamarin UIGravityBehavior recipe.]
Playing with the new UIKit Dynamics UIGravityBehavior. Get a feel for the basic application of gravity with BasicGravityViewController.
UIDynamicAnimator animator;
public override void ViewDidLoad() {
base.ViewDidLoad();
View.BackgroundColor = UIColor.White;
animator = new UIDynamicAnimator(View);
var item = new UIView(new RectangleF(new PointF(50f, 0f), new SizeF(50f, 50f))) {
BackgroundColor = UIColor.Blue,
};
View.Add(item);
UIGravityBehavior gravity = new UIGravityBehavior(item);
animator.AddBehavior(gravity);
}
Then, play around with changing gravity in ChangingGravityViewController.
View.AddGestureRecognizer(new UISwipeGestureRecognizer((gesture) => {
gravity.GravityDirection = new CGVector(1, 0);
}) { Direction = UISwipeGestureRecognizerDirection.Right, });
View.AddGestureRecognizer(new UISwipeGestureRecognizer((gesture) => {
gravity.GravityDirection = new CGVector(-1, 0);
}) { Direction = UISwipeGestureRecognizerDirection.Left, });
View.AddGestureRecognizer(new UISwipeGestureRecognizer((gesture) => {
gravity.GravityDirection = new CGVector(0, -1);
}) { Direction = UISwipeGestureRecognizerDirection.Up, });
View.AddGestureRecognizer(new UISwipeGestureRecognizer((gesture) => {
gravity.GravityDirection = new CGVector(0, 1);
}) { Direction = UISwipeGestureRecognizerDirection.Down, });
