1.新建脚本的时候能不能跟runtime一样选择目录
2.Scene上面添加个drawCallOptimize开关
3.Sprite是不是可以扩展几个方法
 Object.defineProperty(Laya.Sprite.prototype, "gray", {
            get: function (): boolean { return this._gray },
            set: function (value: boolean) {
                this._gray = value;
                Laya.UIUtils.gray(this, value);
            }
        })

        Object.defineProperty(Laya.Sprite.prototype, "useSourceSize", {
            get: function (): boolean { return this._useSourceSize },
            set: function (value: boolean) {
                if (this._useSourceSize != value) {
                    if (value && this.texture)
                        this.size(this.texture.sourceWidth, this.texture.sourceHeight);
                    this._useSourceSize = value; //放最后，因为size会改变autoSize的值
                }
            }
        })

        Object.defineProperty(Laya.Sprite.prototype, "skin", {
            get: function (): string { return this._skin },
            set: function (url: string) {
                this._skin = url;
                if (!url) {
                    this.texture = null;
                    this.repaint(Laya.SpriteConst.REPAINT_ALL);
                } else {
                    let tex = Laya.loader.getRes(url);
                    if (tex) {
                        this.texture = tex;
                        this.repaint(Laya.SpriteConst.REPAINT_ALL);
                    }
                    else {
                        if (this._skinBaseUrl)
                            url = Laya.URL.formatURL(url, this._skinBaseUrl);
                        let sk = this._skin;
                        Laya.loader.load(url).then((tex: Laya.Texture) => {
                            if (this._skin == sk) {
                                this.texture = tex;
                                this.repaint(Laya.SpriteConst.REPAINT_ALL);
                            }

                        });
                    }
                }
            }
        })