<button open-type="getUserInfo" @getuserinfo="getUserInfo">登录</button>

  methods: {
    getUserInfo: function(e) {
　　　 console.log(e)
      wx.setStorageSync("nickname", e.mp.detail.userInfo.nickName);
      wx.setStorageSync("avatarUrl", e.mp.detail.userInfo.avatarUrl);
    },
    login() {
      if (!wx.getStorageSync("nickname")) {
        wx.login({
          success: function(res) {
　　　　　　　　console.log(res)
　　　　　　}
        });
      }
    }
  },
  created() {
    this.login();
  },