小程序获取屏幕信息后怎么在样式设置

js:获取系统信息

var that = this;

wx.getSystemInfo({

      success: function (res) {

       that.setData({

          winWidth: res.windowWidth,

          winheight: res.windowHeight

        });

      }

    });

 

css:设置样式：

<view  style="{{winWidth}}px;height:{{winheight}}px;">