构建cocos creator  3d 小游戏项目的排行榜时， 开发者工具报 如下错误。  

onLoad() {

        this.texture = new cc.Texture2D();

    }

  update(dt: number) {

               var openDataContenxt = wx.getOpenDataContext();

               var sharedCanvas = openDataContenxt.canvas;               

               this.texture.initWithElement(sharedCanvas);

               this.texture.handleLoadedTexture();

               this.wxSprite.spriteFrame = new cc.SpriteFrame(this.texture);

               this.subContextView.updateSubContextViewport();

      }