[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(3)

方式二

package  
{ 
    import flash.display.Sprite; 
    import flash.events.Event; 
    import flash.events.MouseEvent; 
    import flash.events.KeyboardEvent; 
    import flash.text.TextField; 
 
    public class Main extends Sprite 
    { 
        var role:Sprite; 
        var speed:int = 5; 
        var keyObj:Object = {}; 
        var keyArr:Array = []; 
        public function Main():void 
        { 
            role=new Sprite(); 
            role.graphics.beginFill(0xff00ff); 
            role.graphics.drawRect(10,-40,20,40); 
            role.graphics.endFill(); 
            role.x = 150; 
            role.y = 200; 
            addChild(role); 
            stage.focus = this; 
            keyOne(); 
        } 
 
 
 
        private function keyOne() 
        { 
            stage.addEventListener(KeyboardEvent.KEY_DOWN,KeyDownHandler); 
            stage.addEventListener(KeyboardEvent.KEY_UP,KeyUpHandler); 
        } 
 
        private function KeyDownHandler(e:KeyboardEvent) 
        { 
            keyObj[e.keyCode] = true; 
 
            if (keyObj[32]) 
            { 
                trace("space"); 
                //role.y -=  3 * speed; 
            } 
            if (keyObj[37]) 
            { 
                trace("left"); 
                role.x -=  speed; 
            } 
            if (keyObj[38]) 
            { 
                trace("down"); 
                role.y -=  speed; 
            } 
            if (keyObj[39]) 
            { 
                trace("right"); 
                role.x +=  speed; 
            } 
 
            if (keyObj[40]) 
            { 
                trace("up"); 
                role.y +=  speed; 
            } 
 
            if (keyObj[13] && keyObj[17]) 
            { 
                trace("cuplayer.com提示八连杀，好无敌。我要发射了。"); 
                var txt:TextField=new TextField(); 
                txt.multiline = true; 
                txt.wordWrap = true; 
                txt.text = "cuplayer.com提示八连杀，好强大。一句就能爆菊花！"; 
                txt.x=int(50*Math.random()); 
                txt.y=-int(200*Math.random()); 
                while(role.numChildren>0) 
                { 
                    role.removeChildAt(0); 
                } 
                role.addChild(txt); 
            } 
        } 
 
        private function KeyUpHandler(e:KeyboardEvent) 
        { 
            keyObj[e.keyCode] = false; 
        } 
 
        private function keyTwo() 
        { 
            stage.addEventListener(KeyboardEvent.KEY_DOWN,keyDownHandler); 
            stage.addEventListener(KeyboardEvent.KEY_UP,keyUpHandler); 
            addEventListener(Event.ENTER_FRAME,enterFrameHandler); 
        } 
 
        private function keyDownHandler(e:KeyboardEvent) 
        { 
            var num = keyArr.indexOf(e.keyCode); 
            if (num<0) 
            { 
                keyArr.push(e.keyCode); 
            } 
        } 
 
        private function keyUpHandler(e:KeyboardEvent) 
        { 
            var num = keyArr.indexOf(e.keyCode); 
            if (num>=0) 
            { 
                keyArr.splice(num,1); 
            } 
 
        } 
 
        private function enterFrameHandler(e:Event) 
        { 
            trace(keyArr); 
        } 
    } 
}