//获取用户的授权信息，放到本地缓存中
    wx.getSetting({
      success: (res) => {
        if(res.authSetting[‘scope.userInfo‘])
        {
          wx.setStorage({
            key: ‘can_getuserinfo‘,
            data: 1,
          })
        }
        else
        {
          wx.setStorage({
            key: ‘can_getuserinfo‘,
            data: 0,
          })
        }
      }
    }),
    //1:从本地缓存中获取数据，如果获取到根据结果显示Index页面的授权按钮是否显示，
    //2:如果从本地缓存获取不到数据则说明用户清空了本地数据，默认设置为0，让用户重新授权
    wx.getStorage({
      key: ‘can_getuserinfo‘,
      success: function (res) { 
        console.log(res.data);
        that.setData({
          can_getuserinfo:res.data
        })
      },fail:function()
      {
        that.setData({
          can_getuserinfo: 0
        })
      }
    })
   
  },

<view wx:if="{{can_getuserinfo==0}}">
<text>\n</text>
<text>\n</text>
<text>\n</text>
<button wx:if="{{canIUse}}" open-type="getUserInfo" bindgetuserinfo="bindGetUserInfo">授权登录</button>
<view wx:else>请升级微信版本</view>
</view>