網上有很多種方法,剛開始看的時候都感覺莫名奇妙。不知道他們說啥,理解能力有限,我梳理了一下。
這裏我介紹的主要是兩種緩存某個頁面的方法fang
方法一(頁面只刷新一次,任何頁面跳轉到這個頁面都不刷新)
直接在你的router-view 標籤外面包一個keep-alive 加include="組件名稱"
<keep-alive include="FileList">
<router-view></router-view>
</keep-alive>
這時候匹配到的組件就會值加在一次。這個就比較簡單,但能使用性不廣。
方法二(keep-alive與vue-router配合使用)
配置路由的時候需要加 keepAlive: true 參數 (我把代碼完整貼出來,有點長)
import Vue from 'vue'
import Router from 'vue-router'
import Login from '@/components/Login/Login'
import Regist from '@/components/Login/Regist'
import P404 from '@/components/404/404'
import Loading from '@/components/404/Loading'
import Main from '@/components/Main'
import User from '@/components/Basic/User' //用戶
import Role from '@/components/Basic/Role' //角色
import Department from '@/components/Basic/Department' //部門
import RPermissions from '@/components/Basic/RPermissions' //角色權限設置
import DPermissions from '@/components/Basic/DPermissions' //部門權限設置
import RoleList from '@/components/Basic/RoleList' //角色成員列表
import DeparmentList from '@/components/Basic/DeparmentList' //部門成員列表
import LogLogin from '@/components/Basic/LogLogin' //登錄日誌
import LogOperation from '@/components/Basic/LogOperation' //操作日誌
import LogFile from '@/components/Basic/LogFile' //文件日誌
import Class from '@/components/Basic/Class' //文件日誌
import SetFile from '@/components/Basic/SetFile' //文件上傳
import FileAudit from '@/components/Basic/FileAudit' //文件審覈
import FileList from '@/components/Basic/FileList' //文件列表
import FileView from '@/components/Basic/FileView' //文件預覽
Vue.use(Router)
export default new Router({
mode: 'hash',//history
routes: [
{
path: '/login',//登錄頁
name: 'Login',
component: Login
},
{
path: '/regist',//註冊頁
name: 'Regist',
component: Regist
},
{
path: '/',//首頁
name: 'Main',
component: Main,
redirect: '/Loading',//默認子路由
meta: {
requireAuth: true, // 添加該字段,表示進入這個路由是需要登錄的
keepAlive: false, //此組件不需要被緩存
},
children: [
{
path: 'user',//用戶管理
component: User,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'role',//角色管理
component: Role,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'department',//部門
component: Department,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'rpermissions',//角色權限設置
component: RPermissions,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'dpermissions',//部門權限設置
component: DPermissions,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'rolelist',//角色成員列表
component: RoleList,
meta: {
requireAuth: true,
},
},
{
path: 'deparmentList',//部門成員列表
component: DeparmentList,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'loglogin',//登錄日誌
component: LogLogin,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'logoperation',//操作日誌
component: LogOperation,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'logfile',//文件日誌
component: LogFile,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'class',//文件分類
component: Class,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'setfile',//文件上傳
component: SetFile,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'fileaudit',//文件審覈
component: FileAudit,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'filelist',//文件列表
component: FileList,
meta: {
requireAuth: true,
keepAlive: true, // 此組件需要被緩存
},
},
{
path: 'fileview',//文件預覽
component: FileView,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
},
{
path: 'Loading',//等待頁面
component: Loading,
meta: {
requireAuth: true,
keepAlive: false, //此組件不需要被緩存
},
}
]
},
{ path: '*', component: P404 }
]
})
配置入口文件
<keep-alive>
<router-view v-if="$route.meta.keepAlive">
<!-- 這裏是會被緩存的視圖組件,比如 Home! -->
</router-view>
</keep-alive>
<router-view v-if="!$route.meta.keepAlive"></router-view>
<!-- 這裏是不被緩存的視圖組件,比如 Edit! -->
之後在 router.beforeEach 方法裏面來動態修改 keepAlive 的值 (我的是這個代碼是放在main.js裏面的,這個就隨你高興了)
router.beforeEach((to, from, next) => {
iView.LoadingBar.start();//loadong 效果
//進入登錄頁面的時候清除 token
if(to.path === '/login' ){
sessionStorage.removeItem("token", '');
sessionStorage.removeItem("user_Data", '');
}
store.state.token = sessionStorage.getItem('token');//獲取本地存儲的token
if (to.meta.requireAuth) { // 判斷該路由是否需要登錄權限
if (store.state.token !== "" && store.state.token !== null) { // 通過vuex state獲取當前的token是否存在
//判斷是否需要緩存
if(to.path === '/filelist' && from.path === '/fileview'){
to.meta.keepAlive = true; // 讓 列表頁 緩存,即不刷新
next();
}else {
to.meta.keepAlive = false; // 讓 列表頁 即不緩存,刷新
next();
}
}else {
next({
path: '/login',
query: {redirect: from.fullPath} // 將跳轉的路由path作爲參數,登錄成功後跳轉到該路由
})
}
}else {
next();
}
})
我這裏只判斷 to.path === '/filelist' && from.path === '/fileview' (翻譯從文一下這個代碼,本路徑是fileview,要跳轉的路徑是filelist,也就是從fileviewlu路徑跳轉到filelist,不刷新filelist頁面)表頁的時候緩存,外面的那些token什麼的不知道的話,請看我的以前一篇博客傳送門。
這裏我們就可以愉快的使用之前緩存是數據了。