1.登录相关
登录简单来说就是用uni.login获取登陆凭证code。然后调用后台登录接口传递给后台，后台解码再返回token等一系列信息给前端
参考地址：
微信小程序获取用户手机号码教程（前端+后端）_微信小程序获取手机号-CSDN博客
代码
login() {let _this = this;// 获取登录用户codeuni.login({provider: 'weixin',success: function(res) {console.log(res,'res')if (res.code) {let code = res.code;//微信授权的人员信息uni.setStorageSync("wxUserInfo", _this.userInfo);uni.request({url: $newApi.AuthLoginByWeixin,method: 'GET',data: {code: code,// userInfo: _this.userInfo,tenant:_this.tenant},header: {'content-type': 'application/json', //自定义请求头信息'tenant':_this.tenant, },success: function(res) {console.log("授权登录", res);uni.setStorageSync("userInfo", res.data.userInfo);_this.openid = res.data.userInfo.openid;if (res.data.token && res.data.token != '') {uni.setStorageSync("token", res.data.token);}if (_this.pageName == '/pages/home/studentHome') {uni.switchTab({url: _this.pageName})} else {//存在sessionId则直接去扫码的页面，没有的话就去获取手机号码if (res.data.userInfo.sessionId && res.data.userInfo.sessionId.length > 0) {console.log("if", _this.pageName)uni.navigateTo({url: _this.pageName,success(res) {console.log(res)},fail(err) {console.log(err);uni.switchTab({url: _this.pageName})}})} else {console.log("else")// _this.updateUserInfo()}}},fail: (error) => {console.log("授权登录失败", error)},complete: (res) => {}});} else {uni.showToast({title: '登录失败！',duration: 2000});}},});},