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import UIKitclass ViewController: UIViewController { @IBOutlet weak var imageView: UIImageView! var dynamicAnimator = UIDynamicAnimator() var snap:UISnapBehavior? override func viewDidLoad() { super.viewDidLoad() dynamicAnimator = UIDynamicAnimator(referenceView: self.view) } @IBAction func tapped(sender:AnyObject){ //获取点击位置 let tap = sender as! UITapGestureRecognizer let point = tap.locationInView(self.view) //删除之前的吸附,添加一个新的 if self.snap != nil { self.dynamicAnimator.removeBehavior(self.snap!) } self.snap = UISnapBehavior(item: self.imageView, snapToPoint: point) self.dynamicAnimator.addBehavior(self.snap!) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() }} |
Swift - 使用UI Dynamics给UIKit组件添加移动吸附行为
原文：http://www.cnblogs.com/Free-Thinker/p/4858369.html