强制屏幕重绘而不是使用removeChild()然后addChild()来更新图像？

Question

这是我创建的一些代码作为另一个问题的答案。它将库项目从库中拉出，并以编程方式将其放在舞台上。没什么大不了的，除了为了让屏幕上显示的图像实际更新，我必须删除Child()，然后用addChild()将其返回。还有其他方法可以强制屏幕重画吗？

var currentImage:int = 1;
var MAX_IMAGES:int = 3;

MC_prevButton.addEventListener(MouseEvent.CLICK, goBack);
MC_nextButton.addEventListener(MouseEvent.CLICK, goForward);

var imageClip:MovieClip = new Image_1();
var thumbClip:MovieClip = new Thumb_1();

imageClip.x = thumbClip.x = stage.stageWidth/2;
imageClip.y = thumbClip.y = stage.stageHeight/2;



addChildAt(thumbClip, 0);
addChildAt(imageClip, 1);

setImages(currentImage);

function goBack(event:MouseEvent):void {
    if (currentImage) currentImage--;
    setImages(currentImage);
}

function goForward(event:MouseEvent):void {
    if (currentImage < MAX_IMAGES) currentImage++;
    setImages(currentImage);
}

function setImages(imageNumber){
    trace("Setting image number: " + imageNumber);

    var LibraryImage:Class = getDefinitionByName("Image_" + imageNumber) as Class;
    if (LibraryImage){
        removeChild(imageClip);
        imageClip = new LibraryImage();
        addChildAt(imageClip, 1);
    }
    var LibraryThumb:Class = getDefinitionByName("Thumb_" + imageNumber) as Class;
    if (LibraryThumb){
        removeChild(thumbClip);
        thumbClip = new LibraryThumb();
        addChildAt(thumbClip, 0);
    }

    imageClip.x = thumbClip.x = stage.stageWidth/2;
    imageClip.y = thumbClip.y = stage.stageHeight/2;
}

请注意，在此示例中，此代码位于时间线的第 1 帧上，并且它是一个 1 帧 FLA 文件

Answer 1

尝试在前进和后退方法的末尾调用 updateAfterEvent() ：

function goForward(event:MouseEvent):void {
    if (currentImage < MAX_IMAGES) currentImage++;
    setImages(currentImage);
    event.updateAfterEvent();
}