Question

我的按钮只有一次工作有问题。该按钮触发自定义事件。触发自定义事件，我的DocumentClass上的监听器第一次接收它，但在此之后不会响应。

要复制 Click Here，然后单击“开始游戏”，然后单击菜单按钮右上角，然后单击主菜单，再单击“开始游戏”，然后单击右上角的菜单按钮，然后注意您无法再次单击主菜单。那是我的问题。它应该继续工作。

DocumentClass添加了子openScreen。 openScreen为DocumentClass触发事件以添加子playScreen并删除openScreen。当点击playScreen上的菜单按钮时，playscreen会添加子菜单屏幕。 **单击主菜单按钮时，将触发DocumentClass侦听的事件。触发的功能将删除playScreen并添加一个打开的屏幕。这一系列事件只有在**步骤挂起之前才能完全运行一次。

文档课

public class DocumentClass extends MovieClip 
{
    public var playScreen:PlayScreen = new PlayScreen();
    public var openScreen:OpenScreen = new OpenScreen();
    public var started:Boolean = false;     

    public function DocumentClass() 
    {
        openScreen.addEventListener( GameEvent.STAR, OnPlayClick);
        playScreen.addEventListener( GameEvent.NG, NewGame);
        playScreen.menuScreen.addEventListener( GameEvent.NG, NewGame, true,  0, true);
        playScreen.menuScreen.addEventListener( GameEvent.MM, onMain);
        addChild(openScreen)


    }

    public function OnPlayClick(gameEvent:GameEvent):void{
        trace("start")

        addChildAt(playScreen,0)
        var tweenX:Tween = new Tween(openScreen, "x", None.easeIn, 0, -480, .5, true);
        tweenX.addEventListener(TweenEvent.MOTION_FINISH, onTweenDone);


    }
    public function NewGame(gameEvent:GameEvent):void{
        removeChild(playScreen)
        playScreen = new PlayScreen();
        addChild(playScreen)
        playScreen.begin()
    }
    public function onMain(gameEvent:GameEvent):void{
        playScreen.removeChild(playScreen.menuScreen)
        this.removeChild(playScreen)
        //openScreen = new OpenScreen();
        openScreen.x = 0
        addChild(openScreen)
        playScreen = new PlayScreen();

MenuScreen 公共类MenuScreen扩展了MovieClip {

    public function MenuScreen() 
    {
        backButton.buttonMode = true
        backButton.addEventListener( MouseEvent.CLICK, OnBackClick );

        exitButton.buttonMode = true
        exitButton.addEventListener( MouseEvent.CLICK, OnExitClick );

        restartButton.buttonMode = true
        restartButton.addEventListener( MouseEvent.CLICK, OnRestartClick );

        mainButton.buttonMode = true
        mainButton.addEventListener( MouseEvent.CLICK, OnMainClick );

        //NativeApplication.nativeApplication.addEventListener(KeyboardEvent.KEY_DOWN, onSystemKey);

        backButton.AnswerText.text = "Return to Game"
        restartButton.AnswerText.text = "Restart"
        mainButton.AnswerText.text = "Main Menu"
        exitButton.AnswerText.text = "Exit"
    }

    public function OnBackClick(myEvent:MouseEvent):void{
        this.dispatchEvent( new GameEvent( GameEvent.BAC ))

    }
    public function OnExitClick(myEvent:MouseEvent):void{
        //NativeApplication.nativeApplication.exit();

    }
    public function OnRestartClick(myEvent:MouseEvent):void{
        this.dispatchEvent( new GameEvent( GameEvent.NG ))
        trace("restrt click")
    }
    public function OnMainClick(myEvent:MouseEvent):void{
        this.dispatchEvent( new GameEvent( GameEvent.MM ))
        trace("main click")
    }

    protected function onSystemKey(e:KeyboardEvent):void
    {
        if(e.keyCode == Keyboard.BACK)
        {
            e.preventDefault();
            this.dispatchEvent( new GameEvent( GameEvent.BAC ))
        }
        else if(e.keyCode == Keyboard.HOME)
        {
            //handle the button press here. 
        }
        else if(e.keyCode == Keyboard.MENU)
        {
            //handle the button press here.
        }
    }


}

OpenScreen

 public class OpenScreen extends MovieClip 
{

    public var hs:String

    public function OpenScreen() 
    {
        startButton.buttonMode = true
        startButton.addEventListener( MouseEvent.CLICK, OnStartClick );

        exitButton.buttonMode = true
        exitButton.addEventListener( MouseEvent.CLICK, OnExitClick );


        //NativeApplication.nativeApplication.addEventListener(KeyboardEvent.KEY_DOWN, onSystemKey);
        readObject()
        highScoreText.text = String(hs)
        trace(highScoreText.text)
        startButton.AnswerText.text = "Start"
        //restartButton.AnswerText.text = "Restart"
        //mainButton.AnswerText.text = "Main Menu"
        exitButton.AnswerText.text = "Exit"
    }

    public function OnStartClick(myEvent:MouseEvent):void{
        trace(this.hasEventListener( GameEvent.STAR ))
        this.dispatchEvent( new GameEvent( GameEvent.STAR ))


    }
    public function OnExitClick(myEvent:MouseEvent):void{
        //NativeApplication.nativeApplication.exit();

    }


    protected function onSystemKey(e:KeyboardEvent):void
    {
        if(e.keyCode == Keyboard.BACK)
        {

            //NativeApplication.nativeApplication.exit();
        }
        else if(e.keyCode == Keyboard.HOME)
        {
            //handle the button press here. 
        }
        else if(e.keyCode == Keyboard.MENU)
        {

        }
    }

Answer 1

看起来原因是因为在您的onMain方法中，您从舞台中删除，然后创建一个全新的播放屏幕实例。所以你的听众与旧的听众联系在一起。这也会造成内存泄漏。

public function onMain(gameEvent:GameEvent):void{
        playScreen.removeChild(playScreen.menuScreen)
        this.removeChild(playScreen)
        //openScreen = new OpenScreen();
        openScreen.x = 0
        addChild(openScreen)
        playScreen = new PlayScreen(); //RIGHT HERE - this is creating a whole new play screen, your listeners are attached to the old one.
}

应该看起来像这样:(取出构造函数中的播放屏幕代码，并在声明它时不要实例化它）

//Create a function that kill your current play screen
public function clearPlayScreen():void {
    if(!playScreen) return; //don't do anything if there isn't a play screen
    playScreen.removeChild(playScreen.menuScreen)
    this.removeChild(playScreen);

    //remove your listeners so the old play screen can be garbage collected - other they will all stay in memory causing a memory leak
    playScreen.removeEventListener( GameEvent.NG, NewGame);
    playScreen.menuScreen.removeEventListener( GameEvent.NG, NewGame, true);
    playScreen.menuScreen.removeEventListener( GameEvent.MM, onMain);

    playScreen = null;
}

public function NewGame(gameEvent:GameEvent):void{
    clearPlayScreen(); //kill the old play screen if it exists

    playScreen = new PlayScreen();
    addChild(playScreen);

    //add the listeners to the new play screen
    playScreen.addEventListener( GameEvent.NG, NewGame);
    playScreen.menuScreen.addEventListener( GameEvent.NG, NewGame, true,  0, true);
    playScreen.menuScreen.addEventListener( GameEvent.MM, onMain);

    playScreen.begin();
}

public function onMain(gameEvent:GameEvent):void{
    clearPlayScreen();

    //openScreen = new OpenScreen();
    openScreen.x = 0;
    addChild(openScreen);
}

按钮只能工作一次

1 个答案: