flex绘图

在FLEXBUILDER里新建一个ACTIONSCRIPT PROJECT，名字就叫flextest 建好后，把我下面的代码全部COPY覆盖到项目里的flextest.as里 ，然后RUN就可以看效果了 ---------------------------flextest.as-------------------------------- package { import flash.display.Sprite; import flash.events.KeyboardEvent; import flash.events.MouseEvent; public class flextest extends Sprite { private var _sperite:Sprite; public function flextest() { _sperite = new Sprite();//建立影片精灵 addChild(_sperite);//把精灵加入显示清单 _sperite.graphics.beginFill(0xffffff); _sperite.graphics.drawRect(0,0,400,400); _sperite.graphics.endFill(); _sperite.addEventListener(MouseEvent.MOUSE_DOWN,onMouseDown); _sperite.addEventListener(MouseEvent.MOUSE_UP,onMouseUp); } private function onMouseDown(event:MouseEvent):void { _sperite.graphics.lineStyle(1,0,1); _sperite.graphics.moveTo(mouseX,mouseY); _sperite.addEventListener(MouseEvent.MOUSE_MOVE,onMouseMove); } private function onMouseUp(event:MouseEvent):void { _sperite.removeEventListener(MouseEvent.MOUSE_MOVE,onMouseMove); } private function onMouseMove(event:MouseEvent):void { _sperite.graphics.lineTo(mouseX,mouseY); } } } --------------------------------------------------------------------- 代码比较简单，就仅仅监听了鼠标的两个事件而以，注释就不写了。若要在MXML里写也一样，把以上代码拷到之间，然后只需要在主页面的creationComplete事件里写个方法。方法里写上 var uicomponent:UIComponent = new UIComponent(); uicomponent.addChild(_sperite); this.addChild(uicomponent); 就OK了。