微信小程序如何修改本地緩存key中單個數據的詳解

{no: "1635050601", name: "張三", sex: "", email: "123@qq.com", classid: "100000-1602", …}
classid:"100000-1602"
classname:"16級PHP2"
departmentid:"100000"
departmentname:"軟件學院"
name:"張三"
no:"1635050601"
sex:""

 //表單提交
 formSubmit: function (e) {
 console.log(e.detail.value);
 var pwd = e.detail.value.pwd;
 var email = e.detail.value.email;
 if (pwd == '') {
 wx.showToast({
 title: '密碼不能為空',
 icon: 'none',
 duration: 1000,
 })
 }else if (email == '') {
 wx.showToast({
 title: '郵箱不能為空',
 icon: 'none',
 duration: 1000,
 })
 }else {
 //post方式提交
 wx.request({
 url: app.globalData.url.bindemail,
 method: "POST",
 data: {
 no: this.data.no,
 pwd: pwd,
 email: email
 },
 header: {
 "Content-Type": "application/x-www-form-urlencoded"
 },
 success: function (res) {
 // console.log(res);
 if(res.data.error == true){
 wx.showToast({
 title: res.data.msg,
 icon: 'none',
 duration: 1000,
 })
 }else{
 //修改email
 var _student = wx.getStorageSync('student');
 _student.email = email;
 wx.setStorageSync('student', _student);
 
 wx.showToast({
 title: res.data.msg,
 icon: 'success',
 duration: 2000,
 success: function () {
 setTimeout(function () {
 wx.reLaunch({
 url: '../myinfo/myinfo',
 })
 }, 2000)
 }
 })
 }
 },
 })
 }
 },

//修改email
 var _student = wx.getStorageSync('student');
 _student.email = email;
 wx.setStorageSync('student', _student);