loadingUI中是加載資源，此時如果想自定義loadingUI界面，那么此刻正在加載的圖片肯定不能用了。

　　解決方法就是使用服務器資源 直接加載服務器資源就好了

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;
}
}

轉載于:https://www.cnblogs.com/young-boy/p/5669502.html

總結

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