uniapp微信小程序登陆-升级版，登陆加登录信息过期以后的无痕登陆

export const request = (url, method = 'get', params = {}) => {
  const token = uni.getStorageSync('token') || ''; //获取token
  uni.showLoading({
  title: "加载中"
  });
  return new Promise((resolve, reject) => {
  uni.request({
    url: myApi.hostBaseUrl + url,
    method: method,
    header: {
    'X-Token': token
    },
    data: {
    ...params
    },
    success(res) {
    console.log('request', res)
    if (res.data.msg === "登录信息已失效，请重新登录") {
      let loginInfo = uni.getStorageSync('loginInfo');
      if (loginInfo == '') {
      //这里是对token失效 同时也没有缓存uni.getUserProfile()数据做的处理
      uni.redirectTo({
        url: '/pages/myUser/wxSign/wxSign?fromUrl=' +
        encodeURIComponent(getCurrentPages()[
          getCurrentPages()
          .length - 1].$page.fullPath)
      })
      } else {
      //这里是已经缓存了uni.getUserProfile()数据 直接发起调用登陆
      wxlogin(loginInfo)
      }
    } else {
      if (res.data.code != 200) {
      uni.showToast({
        title: res.data.msg,
        icon: 'none'
      })
      return
      }
      resolve(res);
    }
    },
    fail(err) {
    reject(err);
    },
    complete() {
    uni.hideLoading();
    }
  });
  });
};
wxlogin = (loginInfo) => {
  let that = this;
  uni.showLoading({
  title: '登录中'
  });
  uni.login({
  desc: 'weixin',
  success: res => {
    uni.request({
    url: '请求后端登陆接口',
    data: {
      code: res.code,
      encryptedData: loginInfo.encryptedData,
      iv: loginInfo.iv
    },
    method: 'GET',
    success(res) {
      console.log('登陆成功')
      //下面将从新刷新页面
      var pages = getCurrentPages(); //获取所有页面的数组对象
      var currPage = pages[pages.length - 1]; //当前页面
      uni.reLaunch({
      url: currPage.$page.fullPath
      })
    },
    fail() {
      that.$refs.uNotify.show({
      message: '授权失败，请联系管理员',
      type: 'error'
      });
    }
    });
  }
  });
}