AS3设置雪碧容器的宽度和高度

Question

好吧，我的头脑在这个问题上令人难以置信。我知道这可能看起来像一个简单的问题，我不明白为什么我不能弄清楚，但我不能和我放弃。这里的问题：

我有一个精灵容器应该保存一串缩略图视频。我可以用所有的视频和整个工程填充容器，但很明显，如果我添加一堆视频将超过Flash文档的大小，所以我需要添加一个UIScrollBar（我这样做）现在滚动条目标被设置为容器，但不允许我滚动，如果我更正这是因为容器没有设置高度。所以我试图设置这个容器的高度，但第二我试着设置高度，甚至宽度我所有我的缩略图能够看到的都消失了！就好像它的大小被设置为0时，它甚至没有试图将它设置为指定的大小只是为了测试而没有。反正继承人我的代码，如果任何人都可以帮忙，我真的很感激它！提前致谢！

import fl.controls.UIScrollBar; 

var videoList:XMLList; 
var numVideos:Number; 
var current_Video:Number = 0; 
var video_position:Number; 
var video_paused:Boolean; 
var xmlPlaylist:String; 

//XML File setup 
var playlist_xml:XML; 
var myLoader:URLLoader = new URLLoader(); 

//Playlist setup 
var thumb_width:Number; 
var thumb_height:Number; 
var thumbs_x:Number; 
var thumbs_y:Number; 
var main_container:Sprite; 
var thumbs:Sprite; 
var scrollbar:UIScrollBar; 

//Loader Data 
this.loaderInfo.addEventListener(Event.COMPLETE, loaderComplete); 
function loaderComplete(e:Event):void 
{ 
    var myQueryStrings = this.loaderInfo.parameters; 
    xmlPlaylist = myQueryStrings.pList; 

    myLoader.load(new URLRequest(xmlPlaylist + "?uniq=" + new Date().getTime())); 
} 

myLoader.addEventListener(Event.COMPLETE, processXML); 
function processXML(e:Event):void { 
    playlist_xml = new XML(e.target.data); 

    numVideos = playlist_xml.video.length(); 
    videoList = playlist_xml.video; 

    thumb_width = playlist_xml.@thumb_width; 
    thumb_height = playlist_xml.@thumb_height; 
    thumbs_x = playlist_xml.@thumbs_x; 
    thumbs_y = playlist_xml.@thumbs_y; 

    current_Video = Math.round(Math.random()*(numVideos-1))+1; 
    current_Video--; 

    startPlayer(); 
} 

function startPlayer() 
{ 
    makeContainers(); 
    callThumbs(); 
    setVideo(current_Video); 
} 

function makeContainers():void 
{ 
    main_container = new Sprite(); 
    addChild(main_container); 

    thumbs = new Sprite(); 
    thumbs.addEventListener(MouseEvent.CLICK, playVideo); 
    thumbs.addEventListener(MouseEvent.MOUSE_OVER, onOver); 
    thumbs.addEventListener(MouseEvent.MOUSE_OUT, onOut); 
    thumbs.x = thumbs_x; 
    thumbs.y = thumbs_y; 

这就是问题：（如果我注释掉的代码会显示缩略图）

    thumbs.width = thumb_width; 
    thumbs.height = (thumb_height + 11) * 3; 

    thumbs.buttonMode = true; 
    main_container.addChild(thumbs); 

    scrollbar = new UIScrollBar(); 
    scrollbar.x = thumbs_x + thumb_width + 2; 
    scrollbar.y = thumbs_y; 
    scrollbar.setSize(25, (thumb_height + 11) * 3); 
    scrollbar.visible = true; 
    scrollbar.scrollTarget = thumbs; 
    main_container.addChild(scrollbar); 
} 

function callThumbs():void 
{ 
    for (var i:Number = 0; i (less than) numVideos; i++) //For some reason Stack Overflow isnt allowing me to put the symbol less than so i just typed it in... 
    { 
     var thumb_url = videoList[i].@thumb; 
     var thumb_loader = new Loader(); 
     thumb_loader.name = i; 
     thumb_loader.load(new URLRequest(thumb_url)); 

     thumb_loader.contentLoaderInfo.addEventListener(Event.COMPLETE, thumbLoaded); 

     thumb_loader.y = (thumb_height + 11) * i; 
    } 
} 

function thumbLoaded(e:Event):void 
{ 
    var my_thumb:Loader = Loader(e.target.loader); 
    thumbs.addChild(my_thumb); 
} 

function playVideo(e:MouseEvent):void 
{ 
    setVideo(e.target.name); 
} 

function onOver (e:MouseEvent):void 
{ 
    var my_thumb:Loader = Loader(e.target); 
    my_thumb.alpha = 0.5; 
} 

function onOut (e:MouseEvent):void 
{ 
    var my_thumb:Loader = Loader (e.target); 
    my_thumb.alpha = 1; 
} 

function setVideo(current_Video) 
{ 
    var display:String = videoList[current_Video].@title; 
    var video:String = videoList[current_Video].@url; 

    txt_Display.text = display; 
    flvPlayer.source = video; 
} 

stop(); 

Answer 1

这很容易。您正在创建Sprite，添加监听器，设置坐标。精灵仍然是空的。然后你设置宽度和高度，这将转换为scaleX和scaleY。在空精灵上，这会扰乱转换矩阵，精灵永远不会出现。仅在非空精灵上设置宽度，高度或scaleX/Y。