Flex的事件处理方式

在Flex中有三种事件处理方式：
1.在 MXML 中注册事件处理程序如下：
<mx:Script>
        <![CDATA[
            import flash.events.MouseEvent;
       
            private function clickHandler ( event:MouseEvent ):void
            {
                myLabel.text = "Hello, World!";
            }
        ]]>
    </mx:Script>
<mx:Button id="myButton" label="Click Me!" click="clickHandler(event);" />

2.在 MXML 定义中创建线上事件处理程序
<mx:Button id="myButton" label="Click Me!" click="myLabel.text = 'Hello, World!'" />
3.通过 ActionScript 注册事件监听器
<mx:Script>
        <![CDATA[
            import flash.events.MouseEvent;
            import mx.events.FlexEvent;

            private function creationCompleteHandler(event:FlexEvent):void

            {
                // Listen for the click event on the Button control
                myButton.addEventListener (MouseEvent.CLICK, clickHandler);
            }
       
            private function clickHandler ( event:Event ):void

            {
                myLabel.text = "Hello, World!";
            }
        ]]>
    </mx:Script>
<mx:Button id="myButton" label="Click Me!" />