这个方法网上已经有人写过例子...
在这里我只是自己做个实例并记录一下..
首先~自定义Flex加载的原理其实就是继承mx.preloaders.DownloadProgressBar类..然后重写相关的方法..
查看源码打印关于此插件
01.package
02.{
03. import flash.display.*;
04. import flash.events.*;
05. import flash.net.*;
06. import flash.text.TextField;
07. import flash.text.TextFormat;
08.
09. import mx.events.FlexEvent;
10. import mx.preloaders.DownloadProgressBar;
11.
12. public class LoadingExampleProgressBar extends DownloadProgressBar
13. {
14. private var logo:Loader;
15. private var txt:TextField;
16. private var _preloader:Sprite;
17. public function LoadingExampleProgressBar()
18. {
19. logo = new Loader();
20. logo.load(new URLRequest("l4cd.png"));
21. addChild(logo);
22.
23. var style:TextFormat = new TextFormat(null,null,0xFFFFFF,"center");
24. txt = new TextField();
25. txt.defaultTextFormat = style;
26. txt.width = 200;
27. txt.selectable = false;
28. txt.height = 20;
29. addChild(txt);
30.
31. super();
32. }
33. //最重要的代码就在这里..重写preloader,让swf执行加载的时候~进行你希望的操作~
34. override public function set preloader(value:Sprite):void{
35. _preloader = value
36. //四个侦听~分别是 加载进度 / 加载完毕 / 初始化进度 / 初始化完毕
37. _preloader.addEventListener(ProgressEvent.PROGRESS,load_progress);
38. _preloader.addEventListener(Event.COMPLETE,load_complete);
39. _preloader.addEventListener(FlexEvent.INIT_PROGRESS,init_progress);
40. _preloader.addEventListener(FlexEvent.INIT_COMPLETE,init_complete);
41.
42. stage.addEventListener(Event.RESIZE,resize)
43. resize(null);
44. }
45. private function remove():void{
46. _preloader.removeEventListener(ProgressEvent.PROGRESS,load_progress);
47. _preloader.removeEventListener(Event.COMPLETE,load_complete);
48. _preloader.removeEventListener(FlexEvent.INIT_PROGRESS,init_progress);
49. _preloader.removeEventListener(FlexEvent.INIT_COMPLETE,init_complete);
50. stage.removeEventListener(Event.RESIZE,resize)
51. }
52. private function resize(e:Event):void{
53. logo.x = (stage.stageWidth - 40)/2;
54. logo.y = (stage.stageHeight - 80)/2;
55. txt.x = (stage.stageWidth - 200)/2;
56. txt.y = logo.y + 40+5;
57.
58. graphics.clear();
59. graphics.beginFill(0x333333);
60. graphics.drawRect(0,0,stage.stageWidth,stage.stageHeight);
61. graphics.endFill();
62. }
63. private function load_progress(e:ProgressEvent):void{
64. txt.text = "正在加载..."+int(e.bytesLoaded/e.bytesTotal*100)+"%";
65. }
66. private function load_complete(e:Event):void{
67. txt.text = "加载完毕!"
68. }
69. private function init_progress(e:FlexEvent):void{
70. txt.text = "正在初始化..."
71. }
72. private function init_complete(e:FlexEvent):void{
73. txt.text = "初始化完毕!"
74. remove()
75. //最后这个地方需要dpe一个Event.COMPLETE事件..表示加载完毕让swf继续操作~
76. dispatchEvent(new Event(Event.COMPLETE))
77. }
78. }
79.}
自定义了加载类后..我们新建一个app测试一下..
查看源码打印关于此插件
1.<?xml version="1.0" encoding="utf-8"?>
2.<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
3. preloader="LoadingExampleProgressBar"
4. backgroundGradientAlphas="[1.0,1.0]" backgroundGradientColors="[#333333,#333333]">
5.</mx:Application>
6.//请自行增加一“大”体积的东西..必放到网上去测试...
