flex自定义事件使用

1.创建事件

public class TestEvent extends Event
	{
		//事件类型
		public static const TEST_EVENT:String = "TEST_EVENT";
		//存储事件的附加信息
		public var data:Object;
		public function TestEvent(type:String, bubbles:Boolean=false, cancelable:Boolean=false)
		{
			super(type, bubbles, cancelable);
		}
	}

 

2.注册监听

3.分派事件

4.执行监听

<?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"
			   creationComplete="init()">
	<fx:Declarations>
		<!-- 将非可视元素（例如服务、值对象）放在此处 -->
	</fx:Declarations>
	<fx:Script>
		<![CDATA[
			import com.mydispatcher.TestEventDispatcher;
			import com.myevent.TestEvent;
			//2.注册监听
			private function init():void
			{
				//4.监听到后，就会执行testListener
				addEventListener(TestEvent.TEST_EVENT,testListener);
				//var ted:TestEventDispatcher = new TestEventDispatcher();
			}
			//自己派发的事件，所以在init自己监听就行了
			private function onClick():void
			{
				
				trace("执行了");
				var testEvent:TestEvent = new TestEvent(TestEvent.TEST_EVENT,true);
				//3.派发事件
				dispatchEvent(testEvent);
				trace(testEvent.eventPhase+"=========");
				
			}
			//别人派发的事件，所以需要在别人的对象旬添加监听
			private function onClick2():void
			{
				
				trace("执行了");
				var ted:TestEventDispatcher = new TestEventDispatcher();
				//ted派发事件，所以给在ted上添加监听
				ted.addEventListener(TestEvent.TEST_EVENT,testListener);
				ted.createAndDispathEvent();
				
			}
			
			
			private function testListener(event:TestEvent):void
			{
				trace("我监听到了！");
				trace(event.eventPhase);
			}

		]]>
	</fx:Script>
	<s:Panel width="100%" height="100%" >
		<s:HGroup>
			<s:Button label="点击" click="onClick()"/>
			<s:Button label="点击2" click="onClick2()"/>
		</s:HGroup>
	</s:Panel>
		
	
</s:Application>

 

public class TestEventDispatcher extends EventDispatcher
	{
		public function TestEventDispatcher(target:IEventDispatcher=null)
		{
			super(target);
			//this.addEventListener(TestEvent.TEST_EVENT,onTestEvent);
		}
		//创建并派发事件
		public function createAndDispathEvent():void{
			var testEvent:TestEvent = new TestEvent(TestEvent.TEST_EVENT,true);
			testEvent.data = "这是一个测试事件";
			dispatchEvent(testEvent);
		}
		//事件侦听器
//		public function onTestEvent(event:TestEvent):void{
//			trace(event.data);
//		}
		
	}