AS3工程中的Loading的应用

今天又来介绍Loading...(-_-!!!...好像整天都介绍Loading..希望没误导各位...)

首先..由于AS工程没有帧..所以不能用常用的方法来做Loading..

这里介绍的方法使用元标签Frame(应该是元标签吧?还是叫元数据标签)

网上对Frame的介绍是...使用指定的类替换文档类...

并把其它的东西都丢到了该类的第二帧...

概念就不多说了...英文好的可以看看这个文章...http://www.bit-101.com/blog/?p=946

 

Preloader类

package
{
   
import flash.display.DisplayObject;
   
import flash.display.MovieClip;
   
import flash.display.StageScaleMode;
   
import flash.events.Event;
   
import flash.events.ProgressEvent;
   
import flash.text.TextField;
   
import flash.text.TextFormat;
   
import flash.utils.getDefinitionByName;
   
/**
    
* 加载类,由于原内容会放到此类的第二帧~所以需要使用MovieClip;
    
* @author L4cd.Net
    
*/
   
public class Preloader extends MovieClip
   
{
       
[Embed(source="l4cd_48_48.jpg")]
       
private var LogoClass:Class;
       
private var text:TextField;
       
public function Preloader()
       
{
           
//不多说了
           
stage.scaleMode = StageScaleMode.NO_SCALE;
           
stage.showDefaultContextMenu = false;
           
//显示一张图片..非必要
           
with(addChild(new LogoClass()))
           
{
               
x=(500-48)/2;
               
y=(380-48)/2;
           
}
           
//加一个textField显示进度
           
text = addChild(new TextField()) as TextField;
           
with(text)
           
{
               
defaultTextFormat = new TextFormat("宋体",12,0,null,null,null,null,null,"center");
               
mouseEnabled = false;
               
height = 16;
               
x = (500-100)/2;
               
y = 35+(380-15)/2;
           
}
           
//重要~侦听~
           
loaderInfo.addEventListener(ProgressEvent.PROGRESS,progress);
           
loaderInfo.addEventListener(Event.COMPLETE,complete);
       
}
       
//显示进度
       
private function progress(e:ProgressEvent):void
       
{
           
text.text = (e.bytesLoaded/e.bytesTotal*100).toFixed(2)+"% Loaded";
       
}
       
private function complete(e:Event):void
       
{
           
//重要..加载完后...我们跳转到第二帧
           
gotoAndStop(2);
           
//获取文档类...然后显示,对于此步操作..有多种方法..有人习惯直接把原文档类addChild到此类当中..
           
var mainClass:Class = Class(getDefinitionByName("AsProjectLoadingExample"));
           
stage.addChild(new mainClass() as DisplayObject);
           
//删除此类
           
destroy();
       
}
       
private function destroy():void
       
{
           
loaderInfo.removeEventListener(ProgressEvent.PROGRESS,progress);
           
loaderInfo.removeEventListener(Event.COMPLETE,complete);
           
parent.removeChild(this);
       
}
   
}
}

AsProjectLoadingExample类

package {
   
import flash.display.Bitmap;
   
import flash.display.BitmapData;
   
import flash.display.Sprite;
   
import flash.geom.Matrix;
 
 
   
[SWF(width="500",height="380",backgroundColor="#FFFFFF",frameRate="24")]
   
//注意此行,Preloader为类名
   
[Frame(factoryClass="Preloader")]
   
public class AsProjectLoadingExample extends Sprite
   
{
       
[Embed(source="CD艳照.png")]
       
private var ImageClass:Class;
       
//嵌入一个2M的文件以显示加载效果
       
[Embed(source="something.wma",mimeType="application/octet-stream")]
       
private var SomeClass:Class;
       
public function AsProjectLoadingExample()
       
{
           
//马赛格ing...
           
var bmp:Bitmap = new ImageClass();
           
var bit:BitmapData = new BitmapData(bmp.width/10,bmp.height/10,true,0);
           
bit.draw(bmp,new Matrix(.1,0,0,.1));
           
with (addChild(new Bitmap(bit)))
           
{
               
scaleX = scaleY = 10;
           
}
       
}
   
}
}