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import UIKitclass ViewController: UIViewController { @IBOutlet weak var imageView: UIImageView! var dynamicAnimator = UIDynamicAnimator() override func viewDidLoad() { super.viewDidLoad() dynamicAnimator = UIDynamicAnimator(referenceView: self.view) //创建并添加重力行为 let gravityBehavior = UIGravityBehavior(items: [self.imageView]) dynamicAnimator.addBehavior(gravityBehavior) //创建并添加碰撞行为 let collisionBehavior = UICollisionBehavior(items: [self.imageView]) collisionBehavior.translatesReferenceBoundsIntoBoundary = true dynamicAnimator.addBehavior(collisionBehavior) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() }} |
Swift - 使用UI Dynamics给UIKit组件添加重力和碰撞行为
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原文地址：http://www.cnblogs.com/Free-Thinker/p/4858367.html
