Image控件的autoLoad属性。
示例：
代码：
<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/06/29/preventing-an-image-from-automatically-loading-in-an-image-control-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">
<mx:ApplicationControlBar dock="true">
<mx:Button id="btn"
label="Load Image"
click="img.load();" />
</mx:ApplicationControlBar>
<mx:Image id="img"
autoLoad="false"
source="assets/Fx.png"
maintainAspectRatio="true"
percentWidth="100"
percentHeight="100" />
</mx:Application>
通过AS的方法实现：
<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/06/29/preventing-an-image-from-automatically-loading-in-an-image-control-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white"
initialize="init();">
<mx:Script>
<![CDATA[
import mx.containers.ApplicationControlBar;
import mx.controls.Button;
import mx.controls.Image;
private var btn:Button;
private var img:Image;
private function init():void {
btn = new Button();
btn.label = "Load Image";
btn.addEventListener(MouseEvent.CLICK, btn_click);
var appControlBar:ApplicationControlBar = new ApplicationControlBar();
appControlBar.dock = true;
appControlBar.addChild(btn);
Application.application.addChildAt(appControlBar, 0);
img = new Image();
img.autoLoad = false;
img.source = "assets/Fx.png";
img.maintainAspectRatio = true;
img.percentWidth = 100;
img.percentHeight = 100;
addChild(img);
}
private function btn_click(evt:MouseEvent):void {
img.load();
}
]]>
</mx:Script>
</mx:Application>
