ActionScript 3 听导航键
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private var goRight:Boolean = false;
private var goLeft:Boolean = false;
private var goDown:Boolean = false;
private var goUp:Boolean = false;
public function Main()
{
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyHandler);
stage.addEventListener(KeyboardEvent.KEY_UP, upHandler);
}
private function keyHandler(e:KeyboardEvent):void
{
switch (e.keyCode)
{
case Keyboard.UP:
goUp = true;
break;
case Keyboard.DOWN:
goDown = true;
break;
case Keyboard.LEFT:
goLeft = true;
break;
case Keyboard.RIGHT:
goRight = true;
break;
default:
trace(e.keyCode);
break;
}
}
private function upHandler(e:KeyboardEvent):void
{
switch (e.keyCode)
{
case Keyboard.UP:
goUp = false;
break;
case Keyboard.DOWN:
goDown = false;
break;
case Keyboard.LEFT:
goLeft = false;
break;
case Keyboard.RIGHT:
goRight = false;
break;
default:
trace(e.keyCode);
break;
}
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