flash - 使用removeChild方法时出现错误

Question

祝大家万圣节快乐:)

我今天的问题是删除子对象时遇到的 DisplayObject 错误。我有代码将启动(addChild)视频容器和视频控件以及添加关闭按钮。 Now the close button works fine and everything ，删除视频和控件，我可以再次选择另一个视频，但是当您第二次单击“关闭”时，我收到此错误:

ArgumentError:错误#2025:提供的 DisplayObject 必须是调用者的子对象。在 flash.display::DisplayObjectContainer/removeChild()

因此，我将问题范围缩小到删除 videoContainer(保存视频对象)的位置

我的播放视频的代码:

public function videoSwitch(videoName):void
{
    nv.closeOut();
    nv.resetNav = false;

    if (!videoPlaying)
    {
        vc = new VideoClass(videoName, videoHolder);
        vc.addEventListener("KillMovie", removePlayer);
        container.addChild(videoContainer);
        container.addChild(vc);
        //container.addChildAt(videoContainer, 1);
        //container.addChildAt(vc, 2);
        videoPlaying = true;
        closeVideo();
    }

    else if (videoPlaying)
    {
        vc.clearSource();
        container.removeChild(videoContainer);
        container.removeChild(vc);

        vc = new VideoClass(videoName, videoHolder);
        vc.addEventListener("KillMovie", removePlayer);
        container.addChild(videoContainer);
        container.addChild(vc);
        //container.addChildAt(videoContainer, 1);
        //container.addChildAt(vc, 2);
        closeVideo();
    }
        trace("videoPlaying = "+videoPlaying+"\r");
}

结束视频播放器代码: 您可以在我的评论中看到我尝试过的其他代码，但仍然收到错误。

function closeVideo():void 
{
    closeBtn.visible = true;
    closeBtn.x = 770;
    closeBtn.y = 20;
    closeBtn.buttonMode = true;
    container.addChild(closeBtn);
    closeBtn.addEventListener(MouseEvent.MOUSE_UP, closeButtonClicked);

    function closeButtonClicked(event:MouseEvent):void 
    {
        vc.clearSource();
        container.removeChild(videoContainer);
        //container.removeChildAt(videoContainer, 1);
        container.removeChild(vc);
        videoPlaying = false;
        closeBtn.visible = false;
    }
}

现在my movie工作正常，但我担心在后台发生的这个错误(并显示在我的输出窗口中)最终会在其他地方导致问题:(

预先感谢您关注此内容! :)

---

更新: 已修复!问题是我删除了kill VC监听器，但忘记删除了愚蠢的Close Button Mouse_Event监听器:(

function addCloseButton():void 
{
    container.addChild(closeBtn);
    closeBtn.addEventListener(MouseEvent.MOUSE_UP, closeButtonClicked);

    function closeButtonClicked(event:MouseEvent):void 
    {
        videoPlaying=false;
        vc.clearSource();
        removeContainerChildren(); // <- thx Joel!
        closeBtn.removeEventListener(MouseEvent.MOUSE_UP, closeButtonClicked);
        //^ Forgot this line - thx Jotham!
        container.removeChild(closeBtn);
    }
}

不知道这张图是否有帮助，但是:

Answer 1

这是避免该错误的一种方法:

    public function videoSwitch(videoName):void
    {
        nv.closeOut();
        nv.resetNav = false;

        if (videoPlaying)
        {
            vc.clearSource();
            removeContainerChildren()
        }

        addContainerChildren();
        closeVideo();
    }

    protected function removeContainerChildren():void
    {
        if(container.contains(videoContainer))
            container.removeChild(videoContainer);
        if(container.contains(vc))
        {
            container.removeChild(vc)   
            vc.removeEventListener("KillMovie", removePlayer)
        }
    }

    protected function addContainerChildren():void
    {
        videoPlaying = true;
        vc = new VideoClass(videoName, videoHolder);
        vc.addEventListener("KillMovie", removePlayer, false, 0, true); 
        container.addChild(videoContainer);
        container.addChild(vc);

        trace("videoPlaying = "+videoPlaying+"\r");
    }