sampletween.as

《Flash AS3殿堂之路》光盘源码 学习ActionScript 3.0

package org.kingda.book.display
{
	import flash.display.Sprite;
	import fl.transitions.Tween;
	import fl.transitions.easing.Elastic;
	import fl.transitions.TweenEvent;

	public class SampleTween extends Sprite
	{
		private var star:StarShape;
		public function SampleTween() {
			star = new StarShape();
			star.x = 100, star.y = 100;
			addChild(star);
			//运动方式是：Elastic.easeOut指定的就是弹性缓出运动
			var xTween:Tween = new Tween(star, "x", Elastic.easeOut ,100,200, 2, true);			
			xTween.addEventListener(TweenEvent.MOTION_FINISH, continueMove);
		}
		
		private function continueMove(evt:TweenEvent):void {
			var tmpTween:Tween = evt.target as Tween;
			if (star.x >300) {
				tmpTween.yoyo()
			} else {
				tmpTween.continueTo(star.x + 50, 1);
			}
		}
	}
}