[]Panel中添加图片无法显示，文本可以

    //显示一张图片，同样的图片在panel中显示不出来
    var t = Laya.loader.getRes("comp/image.png");
    var ape1 = new Laya.Sprite();
    ape1.graphics.drawTexture(t, 0, 0);
    Laya.stage.addChild(ape1);

    //面板
    var panel = new laya.ui.Panel();
    panel.width = 500;
    panel.height = 500;
    panel.x = 200;

    var label = new laya.ui.Label();
    label.text = "fsadfsdfsdfsdfsdf";
    label.color = "#ff0000";
    label.fontSize = 40;
    label.y = 50;

    var label2 = new laya.ui.Label();
    label2.text = "fsadfsdfsdfsdfsdf";
    label2.color = "#0000ff";
    label2.fontSize = 40;
    label2.y = 100;

    var ape2 = new Laya.Sprite();
    ape2.graphics.drawTexture(t, 0, 0);

    panel.addChild(ape2);
    panel.addChild(label);
    panel.addChild(label2);
    Laya.stage.addChild(panel);