wx.createSelectorQuery()
        .select('#annieEngineOn')
        .fields({
          node: true,
          size: true,
        }).exec(function (res) {
          let canvas = res[0].node;
          annie.devicePixelRatio = sysInfo.pixelRatio;
          canvas.width = windowWidth * sysInfo.pixelRatio;
          canvas.height = windowHeight * sysInfo.pixelRatio;
          annie.CanvasRender.rootContainer = canvas;
          annie.CanvasRender._ctx = canvas.getContext('2d');
          resolve(res)
        })