vue使用localStorage保存登录信息 适用于移动端、PC端

众所周知，vue可以用来开发移动端app，可以使用hbuilder将build好的vue打包成一个移动端app，但是用过之后就会发现，使用cookies或者session保存登录的token，在手机端无法保存，每次打开app依然提示登录。那么我们可以使用localStorage来保存登录信息就可以了，具体代码如下

1、vuex stroe代码

index.js

import Vue from 'vue'
import vuex from 'vuex'
import { login, logout, getInfo } from '@/api/login'
import { getToken, setToken, removeToken, setlocalStorage, getlocalStorage, removelocalStorage } from '@/utils/user'

Vue.use(vuex);

//state为访问状态对象 数字常量等
const state = {
x:5,
token: getlocalStorage(),
nickname: '',
course_id: 0,
user_id: 0,
group_id: 0,
begin_group_num: 0,
student_group: 0
};
//访问触发状态mutation是同步的
//actions是异步的
const mutations = {
SET_TOKEN: (state, token) => {
state.token = token
},
SET_NAME: (state, nickname) => {
state.nickname = nickname
},
};
const actions = {
Login({ commit }, userInfo) {
const username = userInfo.username.trim()
return new Promise((resolve, reject) => {
login(username, userInfo.password).then(response => {
const data = response.data
setlocalStorage(data.token)
commit('SET_TOKEN', data.token)
resolve()
}).catch(error => {
console.log()
reject(error)
})
})
},
GetInfo({ commit }) {
return new Promise((resolve, reject) => {
getInfo().then(response => {
const data = response.data
console.log(data)
commit('SET_NAME', data.nickname)
resolve()
}).catch(error => {
console.log()
})
})
},
// 前端 登出
FedLogOut({ commit }) {
return new Promise(resolve => {
commit('SET_TOKEN', '')
removelocalStorage()
resolve()
})
}
};

//getters 类似于生命周期里面的钩子，getters是在页面刚刚加载完毕之后马上加载，类似于生命周期里面的created
const getters = {
// 测试getters
x: state => state.x + 200,
};
export default new vuex.Store({
state,
mutations,
getters,
actions
})

2、localStorage 代码

user.js

import Cookies from 'js-cookie'

const TokenKey = 'MuseUi-Token'

export function getToken() {
return Cookies.get(TokenKey)
}

export function setToken(token) {
return Cookies.set(TokenKey, token)
}

export function removeToken() {
return Cookies.remove(TokenKey)
}

const SessionKey = 'usertoken'
export function setlocalStorage(token) {
return localStorage.setItem(SessionKey,token)
}

export function getlocalStorage() {
return localStorage.getItem(SessionKey)
}

export function removelocalStorage() {
return localStorage.setItem(SessionKey,null)
}

来源：https://blog.csdn.net/haeasringnar/article/details/82925031