Flex 淡入淡出效果
项目中遇到淡入淡出效果，自己写了个方便用的。
package com.ruixinflex.mapoperation.classes {import mx.effects.Fade;import mx.events.EffectEvent;public class FadeEffect { private var _fadeOut:Fade; private var _fadeIn:Fade; private var _target:Object; private var _isPlaying:Boolean; public function get isPlaying():Boolean { return (this._fadeIn.isPlaying || this._fadeOut.isPlaying); } public function FadeEffect(target:Object) { this._target = target; this._fadeIn = createFadeIn(target); this._fadeOut = createFadeOut(target); this._fadeIn.addEventListener(EffectEvent.EFFECT_START, function (e:EffectEvent):void { e.target.target.visible = true; }); this._fadeOut.addEventListener(EffectEvent.EFFECT_END, function (e:EffectEvent):void { e.target.target.visible = false; }); } public function fadeOut(duration:Number = 1000):void { this._fadeOut.duration = duration; this.endPlay(); this._fadeOut.play(); } public function fadeIn(duration:Number = 1000):void { this._fadeIn.duration = duration; this.endPlay(); this._fadeIn.play(); } public function endPlay():void { if (this._fadeIn.isPlaying) this._fadeIn.end(); if (this._fadeOut.isPlaying) this._fadeOut.end(); } protected function createFadeIn(target:Object):Fade { var result:Fade = new Fade(); result.alphaFrom = 0; result.alphaTo = 1; result.target = target; return result; } protected function createFadeOut(target:Object):Fade { var result:Fade = new Fade(); result.alphaFrom = 1; result.alphaTo = 0; result.target = target; return result; }}}//使用代码private var _fadeEffect:FadeEffect = new FadeEffect(_frmLookup); _fadeEffect.fadeIn();