egret中loadingUI的自定义

　　loadingUI中是加载资源，此时如果想自定义loadingUI界面，那么此刻正在加载的图片肯定不能用了。

　　解决方法就是使用服务器资源 直接加载服务器资源就好了

class LoadingUI extends egret.Sprite {

    public constructor(){
        super();
        this.createView();
    }

    private textField:egret.TextField;

    private createView():void {
        RES.getResByUrl('http://imgsrc.baidu.com/forum/w%3D580/sign=38968a59a5c27d1ea5263bcc2bd4adaf/e34e4559252dd42ac49d3956023b5bb5c8eab81f.jpg',this.onComplete,this,RES.ResourceItem.TYPE_IMAGE);
    }

    private onComplete(event:any):void {
        var img: egret.Texture = <egret.Texture>event;
        var bitmap: egret.Bitmap = new egret.Bitmap(img);
        this.addChild(bitmap);

        this.textField = new egret.TextField();
        this.addChild(this.textField);
        this.textField.y = 500;
        this.textField.width = 480;
        this.textField.height = 100;
        this.textField.textColor = 0x000000;
        this.textField.textAlign = "center";
    }

    public setProgress(current, total):void {
        this.textField.text = "Loading..." + current + "/" + total;
    }

    private createBitmapByName(name:string):egret.Bitmap {
        var result:egret.Bitmap = new egret.Bitmap();
        var texture:egret.Texture = RES.getRes(name);
        result.texture = texture;
        return result;
    }
}