我知道性能分析器的问题可能很普遍,但这里我有一个非常具体的问题和示例。
我知道以下代码(取自Joshua提问)中,无限数量的circle对象实例被添加到hostComponent中。这显然会导致应用程序逐渐变慢。
我的问题是,当我运行Flash Builder Profiler时,我要在哪里看到问题所在? 应用程序示例 要尝试它,请创建一个新的Flex 4项目,并粘贴此代码:
我知道以下代码(取自Joshua提问)中,无限数量的circle对象实例被添加到hostComponent中。这显然会导致应用程序逐渐变慢。
我的问题是,当我运行Flash Builder Profiler时,我要在哪里看到问题所在? 应用程序示例 要尝试它,请创建一个新的Flex 4项目,并粘贴此代码:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"
initialize="onInit()" viewSourceURL="srcview/index.html">
<fx:Script>
<![CDATA[
import mx.core.UIComponent;
import mx.effects.Fade;
import spark.effects.Move;
private var hostComponent:UIComponent;
private function onInit():void{
hostComponent = new UIComponent();
hostComponent.id = "circleHostComponent";
}
/* Add circle UIComponent objects to the hostComponent.
Move and Fade the circle objects */
private function onTimerEvent(event:TimerEvent):void{
var yPos:Number = Math.ceil(Math.random()*100);
var radius:Number = Math.ceil(Math.random()*5); //1-12
var effectAlpha:Number = Math.random()*0.5 + 0.2 // 0-1
var effectDuration:Number = Math.ceil(Math.random()*3000) + 1000;
var circle:UIComponent = new UIComponent();
circle.graphics.beginFill(0x1C75BC, effectAlpha);
circle.graphics.drawCircle(90, yPos, radius);
circle.graphics.endFill();
hostComponent.addChild(circle);
var moveEffect:Move= new Move(circle);
moveEffect.xBy = 300;
moveEffect.duration = effectDuration;
moveEffect.play();
var fadeEffect:Fade = new Fade(circle);
fadeEffect.alphaFrom = 1;
fadeEffect.alphaTo = 0;
fadeEffect.duration = effectDuration;
fadeEffect.play();
this.addElement(hostComponent);
}
private function onClick():void{
startButton.enabled = false;
var t:Timer = new Timer(100, 0);
t.start();
t.addEventListener(TimerEvent.TIMER, onTimerEvent);
}
]]>
</fx:Script>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<s:Button id="startButton" label="Click to Start" click="onClick()" />
</s:Application>