我尝试编写基于框架pureMVC的小型as3程序。我了解它的基本原理,但我不明白,我必须在哪里放置自定义逻辑。例如,我必须加载 10 张图像。我创建了命令,即 init Proxy。
package app.controller
{
import app.model.GalleryProxy;
import dicts.Constants;
import org.puremvc.interfaces.INotification;
public class LoadFilesCommand extends BaseCommand
{
public function LoadFilesCommand() { }
override public function execute(note:INotification):void
{
facade.registerProxy(new GalleryProxy(Constants.FILES_LIST));
}
}
}
代理是:
package app.model
{
import dicts.Constants;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Loader;
import flash.display.LoaderInfo;
import flash.events.ErrorEvent;
import flash.events.Event;
import flash.events.IOErrorEvent;
import flash.net.URLRequest;
import org.puremvc.interfaces.IProxy;
import org.puremvc.patterns.proxy.Proxy;
public class GalleryProxy extends Proxy implements IProxy
{
public function GalleryProxy(list:Vector.<String>)
{
super(Constants.PROXY_GALLERY);
_fileList = list;
_total = _fileList.length;
load();
}
public function get currentImage():Bitmap
{
return _images[_index];
}
//--------------------------------------------------------------------------
// PRIVATE SECTION
//--------------------------------------------------------------------------
private var _fileList:Vector.<String>;
private var _total:uint;
private var _loaded:uint = 0;
private var _images:Array = [];
private var _index:int;
private function load():void
{
var loader:Loader;
for (var i:int = 0; i < _total; i++)
{
loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, imageLoadHandler);
loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, errorHandler);
loader.load(new URLRequest(_fileList[i]));
}
}
private function imageLoadHandler(event:Event):void
{
var info:LoaderInfo = LoaderInfo(event.currentTarget);
_images[Constants.FILES_LIST.indexOf(info.url)] = info.content;
info.removeEventListener(Event.COMPLETE, imageLoadHandler);
info.removeEventListener(IOErrorEvent.IO_ERROR, errorHandler);
_loaded++;
if (_loaded >= _total)
sendNotification(Constants.COMMAND_SHOW_MAIN);
}
private function errorHandler(event:ErrorEvent):void
{
throw new Error("bad link or internet disconnect");
}
}
}
现在我的代理正在独立加载图像(函数 load() 和 imageLoadHandler)是否正确?或者我必须将此逻辑移至 Command 类?或者我必须创建一些包含此逻辑的 LoadService.as?pureMVC 的正确变体是什么?