利用Flash AS3 制作Loading加载进度条

var request:URLRequest = new URLRequest("flashrek.swf");
var loader:Loader = new Loader();   

loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, loadProgress);
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadComplete);   

function loadProgress(event:ProgressEvent):void {
    var percentLoaded:Number = event.bytesLoaded/event.bytesTotal;
    percentLoaded = Math.round(percentLoaded * 100);
    trace("Loading: "+percentLoaded+"%");
}   

function loadComplete(event:Event):void {
    trace("Complete");
}   

loader.load(request);
addChild(loader);  

这里要注意loader的load方法只接受URLRequest对象作为参数；另外就是ProgressEvent类，比较简单，看帮助就好了。

这里只是LOAD外部对象，如何做自身LOADING还要再研究研究，等有了答案再更新。

更新自身Loading

stop();
import flash.display.LoaderInfo;
import flash.events.ProgressEvent;
import flash.text.TextField;
var loadText:TextField=new TextField();
addChild(loadText);
this.loaderInfo.addEventListener(ProgressEvent.PROGRESS,myloadmovie);
this.loaderInfo.addEventListener(Event.COMPLETE,myover);
function myloadmovie(event:ProgressEvent):void {
    var hl:Number=event.bytesLoaded/event.bytesTotal;
    var n:Number=Math.round(hl*100);
    loadText.text=n+"%";
}
function myover (event:Event):void {
    this.loaderInfo.removeEventListener(ProgressEvent.PROGRESS,myloadmovie);
    nextFrame();
}  

下面是另一种自身loading的方法

stop();
import flash.display.LoaderInfo;
import flash.events.ProgressEvent;
import flash.text.TextField;
var loadText:TextField=new TextField();
loadText.x=220;
loadText.y=200;
addChild(loadText);
myload.addEventListener(Event.ENTER_FRAME,onEnterFramee);
function onEnterFramee (event:Event) {
    if (framesLoaded==totalFrames) {
        trace(1);
        myload.removeEventListener(Event.ENTER_FRAME,onEnterFramee);
        nextFrame();
    }
    else {
        var percent:Number=root.loaderInfo.bytesLoaded/root.loaderInfo.bytesTotal;
        var m:Number=Math.round(percent*100);
        myload.gotoAndStop(m);
        loadText.text=m+"%";
    }
}        //myload为场景中预设的loading动画的MC名字