微信小程序地图控件如何靠右侧显示？

微信小程序地图控件如何靠右侧显示？

微信小程序的地图控件如何只给了，left ,top,如果想让控件靠右侧怎么实现呢？ 

  /**
   * 生命周期函数--监听页面加载
   */
 onLoad: function (options) {
    //获取设备信息
    wx.getSystemInfo({
      success:function(res){
        console.log(res.windowWidth);
          that.setData({
              //winWidth: res.windowWidth,
              //winHeight: res.windowHeight,
              controls: [
                {
                  id: 10,
                  iconPath: "/images/map.png",
                  position: {
                    left: res.windowWidth-35,
                    top: 300,
                    width: 30,
                    height: 30
                  },
                  clickable: true
                },{
                  id: 1,
                  iconPath: "/images/dian.png",
                  position: {
                    left: 150,
                    top: 370,
                    width: 30,
                    height: 30
                  },
                  clickable: true
                }

            ]
          })
      }
    })
}