[AS3]as3.0处理按键事件,多个按键按下时的响应事件,按键盘的事件

[AS3]as3.0处理按键事件,多个按键按下时的响应事件,按键盘的事件写法

package  
{ 
    import com.KeyPoll; 
    import flash.display.Sprite; 
    import flash.events.Event; 
    import flash.ui.Keyboard; 
    import flash.text.TextField; 
    import flash.text.TextFormat; 
 
    [SWF(width = "720",height = "450",frameRate = "12",backgroundColor = "0x3366ee")] 
     
    /** 
    *@ web: http://blog.vini123.com www.cuplayer.com 
    *@ explanation 文章来自网上，整理vini。 这个对于键盘控制人物角色八个方向的行走还是比较方便的。 
    */ 
    public class Main extends Sprite 
    { 
        private var key:KeyPoll; 
        private var curPosition:int; 
        private var txt:TextField; 
 
        public function Main():void 
        { 
            addEventListener(Event.ADDED_TO_STAGE,addtoStageHandler); 
        } 
        private function addtoStageHandler(e:Event) 
        { 
            removeEventListener(Event.ADDED_TO_STAGE,addtoStageHandler); 
 
            var txtFormat:TextFormat=new TextFormat(); 
            txtFormat.size = 14; 
            txt=new TextField(); 
            txt.width=stage.stageWidth-20; 
            txt.multiline=true; 
            txt.setTextFormat(txtFormat); 
            txt.textColor=0xff0000; 
            txt.selectable = false; 
            txt.mouseEnabled = false; 
            txt.x = 10; 
            txt.y = 20; 
            addChild(txt); 
            key = new KeyPoll(stage); 
            addEventListener(Event.ENTER_FRAME,enterFrameHandler); 
        } 
        private function enterFrameHandler(e:Event) 
        { 
            controlKey(); 
        } 
 
        private function controlKey():void 
        { 
            if (key.isDown(Keyboard.UP)) 
            { 
 
                if (key.isDown(Keyboard.LEFT)) 
                { 
                    curPosition = 7; 
                } 
                else if (key.isDown(Keyboard.RIGHT)) 
                { 
                    curPosition = 8; 
                } 
                else 
                { 
                    curPosition = 3; 
                } 
            } 
            else if (key.isDown(Keyboard.DOWN)) 
            { 
                if (key.isDown(Keyboard.LEFT)) 
                { 
                    curPosition = 5; 
 
                } 
                else if (key.isDown(Keyboard.RIGHT)) 
                { 
                    curPosition = 6; 
                } 
                else 
                { 
                    curPosition = 1; 
                } 
            } 
            else if (key.isDown(Keyboard.LEFT)) 
            { 
                curPosition = 2; 
 
            } 
            else if (key.isDown(Keyboard.RIGHT)) 
            { 
                curPosition = 4; 
            } 
            txt.text = "cuplayer.com提示请按小键盘的上下左右或两个同时一起按，注意看着：" + String(curPosition); 
        } 
    } 
}