uniapp如何实现微信授权登录

//app第三方登录handleThirdLoginApp(){console.log("App微信拉起授权")var that=thisuni.getProvider({    service: 'oauth',    success: function(res) {        console.log(res.provider);        //支持微信、qq和微博等        if (~res.provider.indexOf('weixin')) {            uni.login({              provider: 'weixin',              success: function (loginRes) {  console.log("App微信获取用户信息成功",loginRes);                  that.getApploginData(loginRes)  //请求登录接口方法              },              fail:function(res){              console.log("App微信获取用户信息失败",res);              }            })        }    }});},//请求登录接口方法getApploginData(data){var that =this//这边是前端自己去调微信用户信息的接口，根据接口需要请求，如果不需要前端去获取的话就交给后端，可省去次操作uni.request({url: "https://api.weixin.qq.com/sns/userinfo?access_token="+data.authResult.access_token+"&openid="+data.authResult.openid,method: 'GET',dataType: 'json',header: {  'content-type': 'application/x-www-form-urlencoded' // 默认值},success(res) {console.log('【登录回调啾啾啾】',res)that.$api.ajax('smdc/index/applogin', res.data,function(ret){console.log("登录接口成功回调：",ret)},'POST',true)},fail() {}})}