Swift-UIDynamic初见

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var dview: UIView!
    var dynamicAnimator = UIDynamicAnimator();
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib
        dynamicAnimator = UIDynamicAnimator(referenceView: self.view);
        // 創建并添加重力行為
        let gravityBehavior = UIGravityBehavior(items: [self.dview]);
        dynamicAnimator.addBehavior(gravityBehavior);
        
        // 創建并添加碰撞行為
        let collisionBehavior = UICollisionBehavior(items: [self.dview]);
        collisionBehavior.translatesReferenceBoundsIntoBoundary = true;
        dynamicAnimator.addBehavior(collisionBehavior);
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated);
        
    }

}

参考资料：

抄自《Swift与Cocoa框架开发》