按键未触发 KeyboardEvent
我正在开始一个简单的乒乓球游戏，并且创建了一个尚未执行任何操作的 Paddle 类。但是，我认为它不起作用。
package
{
import flash.display.MovieClip;
import flash.events.KeyboardEvent;
public class Paddle extends MovieClip
{
private var paddleSpeed:int = 4;
public function Paddle()
{
trace("hello!")
addEventListener(KeyboardEvent.KEY_DOWN, keyDown);
}
public function keyDown(e:KeyboardEvent):void
{
trace(e.keyCode);
}
}
}
在 Main.as 中，我这样做了：
var player:Paddle = new Paddle;
addChild(player);
当我运行代码时，我得到 hello!，但是当我按任意键时什么也没有发生。我读过 KeyboardEvent 教程，并且我正在做他们正在做的事情。感谢您的帮助
I'm starting a simple pong game, and I created a Paddle class that doesn't do anything yet. However, I don't think it is working.
package
{
import flash.display.MovieClip;
import flash.events.KeyboardEvent;
public class Paddle extends MovieClip
{
private var paddleSpeed:int = 4;
public function Paddle()
{
trace("hello!")
addEventListener(KeyboardEvent.KEY_DOWN, keyDown);
}
public function keyDown(e:KeyboardEvent):void
{
trace(e.keyCode);
}
}
}
In Main.as I have done this:
var player:Paddle = new Paddle;
addChild(player);
When I run the code, I get hello!, but when I press any key nothing happens. I've read a KeyboardEvent tutorial, and I'm doing what they are doing. Thanks for any help
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评论（2）
尝试将事件侦听器添加到
stage而不是Paddle。另外，当您测试项目时，请确保禁用键盘快捷键。我实际上通常做的是使用
创建一个函数。它的用法是这样的：Keyboard类我可以在整个应用程序中引用 down()Try adding the event listener to
stageinstead ofPaddle. Also, when you're testing your project make sure you have keyboard shortcuts disabled.What I actually normally do is make a
Keyboardclass with adown()function that I can reference throughout the application. Its use would be something like this:KeyboardEvent.KEY_DOWN由焦点中的物体触发。空剪辑无法对焦。适合您情况的可靠方法是订阅 stage。
KeyboardEvent.KEY_DOWNis triggered by something in focus. Empty clip can not be in focus.Reliable way for your situation is to subscribe to stage.