わかりやすい！ VUEX 状態倉庫管理の詳細説明

/*
  vuex最核心的管理对象 store
*/import Vue from 'vue';import Vuex from 'vuex';
 // 分别引入这四个文件  这四个文件的内容和用法在下面分别讲到import state from './state';import mutations from './mutations';import actions from './actions';import getters from './getters';
 //声明使用插件Vue.use(Vuex)//new 一个Vuex的对象,将state,mutation,action,getters配置到vuex的store中,方便管理数据export default new Vuex.Store({  
  state,
  mutations,
  actions,
  getters,})

import store from './store'// ..........new Vue({
  el: '#app',
  router,
  store,   // ***
  render: h => h(App)})

const mutations = {
  SET_TOKEN: (state, token) => {
    state.token = token;
  },
  SET_USERID: (state, userId) => {
    state.userId = userId;
  },
  SET_NAME: (state, name) => {
    state.name = name;
  },
  SET_ROLES: (state, roles) => {
    state.roles = roles;
  },
  SET_TENANTID: (state, roles) => {
    state.tenantId = roles;
  },
  SET_USER_INFO: (state, userInfo) => {
    state.userInfo = userInfo;
  }};

this.$store.commit('SET_TOKEN', token_data)

 this.$store.dispatch('user/login', postUser)
            .then(res => {
               // .............
              })// 我这里的login方法写在了user.js这个module里 所以这里调用是 user/login// 下面会讲到module

const getters={
  plusCount(state){
    return state.count + 1
  },
 //获取state中状态数据对象，和获取getters模块中plusCount数据
  totalCount(state,getters){
    return getters.plusCount + state.count  }}

this.$store.getters.totalCount()

 computed: {
        count: function(){
            return this.$store.state.count        }
    },

//首先我们需要先将辅助函数引入import { mapGetters,mapState } from 'vuex'
 export default {
 computed: {

  // 使用对象展开运算符将 getter 混入 computed 对象中
  ...mapGetters( ['plusCount','totalCount'] )

 // 使用对象展开运算符将 state 混入 computed 对象中
    ...mapState( ['userInfo','count'] )

 },methods:{
    getData(){
        // 这里就能直接使用了  直接使用state 和getters里的数据
        //  this.userInfo 
        // this.plusCount
        
    }}}

import Vue from 'vue'import Vuex from 'vuex'import getters from './getters'Vue.use(Vuex)const modulesFiles = require.context('./modules', true, /\.js$/)const modules = modulesFiles.keys().reduce((modules, modulePath) => {
  const moduleName = modulePath.replace(/^\.\/(.*)\.\w+$/, '$1')
  const value = modulesFiles(modulePath)
  modules[moduleName] = value.default
  return modules}, {})const store = new Vuex.Store({
  modules,
  getters})export default store

import { getKey, getLogin, logout, getInfo } from '@/api/user';import { setToken, removeToken } from '@/utils/auth';import db from '@/utils/localstorage';import router, { resetRouter } from '@/router';import ElementUI from 'element-ui';const state = {
  userId: '',
  token: '',
  name: '',
  avatar: '',
  introduction: '',
  roles: [],
  tenantId: 1,
  userInfo: null
  // roles: ['9999']};const mutations = {
  SET_TOKEN: (state, token) => {
    state.token = token;
  },
  SET_USERID: (state, userId) => {
    state.userId = userId;
  },
  SET_NAME: (state, name) => {
    state.name = name;
  },
  SET_ROLES: (state, roles) => {
    state.roles = roles;
  },
  SET_TENANTID: (state, roles) => {
    state.tenantId = roles;
  },
  SET_USER_INFO: (state, userInfo) => {
    state.userInfo = userInfo;
  }};const actions = {
  // 获取密钥
  getKey({ commit }) {
    return new Promise((resolve, reject) => {
      getKey()
        .then((response) => {
          resolve(response);
        })
        .catch((error) => {
          reject(error);
        });
    });
  },

  // 用户登录
  login({ commit }, userInfo) {
    // const { username, password } = userInfo;
    const params = userInfo;
    params.userName = userInfo.userName.trim()
    return new Promise((resolve, reject) => {
      // console.log(username, password);
      // setToken(state.token)
      // localStorage.setItem('loginToken', state.token)
      getLogin(params)
      // getLogin({ userName: username.trim(), password: password })
        .then((response) => {
          const { status, message, data } = response || {};
          if (status === 200) {
            // 存入 参数： 1.调用的值 2.所要存入的数据
            commit('SET_USER_INFO', data);
            commit('SET_TOKEN', data.uuid);
            commit('SET_USERID', data.id);
            commit('SET_ROLES', data.roles);
            commit('SET_NAME', data.realName);
            commit('SET_TENANTID', data.tenantId || 1);
            setToken(data.uuid);
            db.save('userInfo', data);
            db.save('tenantId', data.tenantId || 1);
            localStorage.setItem('loginToken', data.uuid);
            resolve(data);
          } else {
            // ElementUI.Message.error(message);  // axios拦截统一提示了
          }
        })
        .catch((error) => {
          // ElementUI.Message.error(error.message); // axios拦截统一提示了
          reject(error);
        });
    });
  },

  // 获取用户信息
  getInfo({ commit, state }) {
    return new Promise((resolve, reject) => {
      getInfo(state.token)
        .then((response) => {
          const { data } = response;
          data.roles = response.data.rights.map(String);
          if (!data) {
            reject('验证失败，请重新登录。');
          }
          const loginMessage = {
            memberId: data.id,
            userName: data.name,
            userTel: data.mobile,
            realName: data.realName,
            incorCom: data.incorCom,
            virtualCor: data.virtualCor,
            deptId: data.deptId,
            deptpath: data.deptpath,
            deptName: data.deptName          };
          localStorage.setItem('loginMessage', JSON.stringify(loginMessage));
          const { id, roles, realName } = data;
          // 角色必须是非空数组!
          if (!roles || roles.length <= 0) {
            reject('getInfo: 角色必须是非空数组!');
          }
          commit('SET_USERID', id);
          commit('SET_ROLES', roles);
          commit('SET_NAME', realName);
          localStorage.setItem('userRights', roles);
          // commit('SET_AVATAR', avatar)
          // commit('SET_INTRODUCTION', introduction)
          resolve(data);
        })
        .catch((error) => {
          reject(error);
        });
    });
  },

  // 用户登出
  logout({ commit, state }) {
    return new Promise((resolve, reject) => {
      logout(state.token)
        .then(() => {
          commit('SET_TOKEN', '');
          commit('SET_ROLES', []);
          db.remove('router');
          removeToken();
          resetRouter();
          resolve();
        })
        .catch((error) => {
          reject(error);
        });
    });
  },

  // 删除token
  resetToken({ commit }) {
    return new Promise((resolve) => {
      commit('SET_TOKEN', '');
      commit('SET_ROLES', []);
      removeToken();
      resolve();
    });
  },

  // 动态修改权限
  changeRoles({ commit, dispatch }, role) {
    return new Promise(async(resolve) => {
      const token = role + '-token';

      commit('SET_TOKEN', token);
      setToken(token);

      const { roles } = await dispatch('getInfo');
      console.log(roles, 'rolesrolesroles');
      resetRouter();

      // 根据角色生成可访问路由映射
      const accessRoutes = await dispatch('permission/generateRoutes', roles, {
        root: true
      });

      // 动态添加可访问路由
      router.addRoutes(accessRoutes);

      // 重置已访问视图和缓存视图
      dispatch('tagsView/delAllViews', null, { root: true });

      resolve();
    });
  }};export default {
  namespaced: true,
  state,
  mutations,
  actions};

// 使用mutationsthis.$store.commit('api/SET_T', keys);// 使用actionsthis.$store.dispatch('user/login', postUser).then(res => {}）// 如果没有分module // 那就是 this.$store.commit('SET_T', keys);// 直接调用方法