实现的效果图
一、先实现导航栏的效果
1、先在@/layout/components/Sidebar目录下新建一个组件ScrollPane.vue，把下面代码复制进去
<template>
<div ref="scrollContainer" class="scroll-container" @wheel.prevent="handleScroll">
<div ref="scrollWrapper" class="scroll-wrapper" :style="{left: left + 'px'}">
<slot />
</div>
</div>
</template>
<script>
const padding = 15 // tag's padding
export default {
name: 'ScrollPane',
data() {
return {
left: 0
}
},
methods: {
handleScroll(e) {
const eventDelta = e.wheelDelta || -e.deltaY * 3// wheelDelta:-120;deltaY:-120
const $container = this.$refs.scrollContainer// 外面的container
const $containerWidth = $container.offsetWidth// 外面的container的宽度
const $wrapper = this.$refs.scrollWrapper// 里面
const $wrapperWidth = $wrapper.offsetWidth// 里面的宽度
if (eventDelta > 0) {
this.left = Math.min(0, this.left + eventDelta)// min() 方法可返回指定的数字中带有最低值的数字。
} else {
if ($containerWidth - padding < $wrapperWidth) {
if (this.left < -($wrapperWidth - $containerWidth + padding)) {
this.left = 1
} else {
this.left = Math.max(this.left + eventDelta, $containerWidth - $wrapperWidth - padding)
}
} else {
this.left = 0
}
}
},
moveToTarget($target) {
const $container = this.$refs.scrollContainer
const $containerWidth = $container.offsetWidth
const $targetLeft = $target.offsetLeft
const $targetWidth = $target.offsetWidth
if ($targetLeft < -this.left) {
// tag in the left
this.left = -$targetLeft + padding
} else if ($targetLeft + padding > -this.left && $targetLeft + $targetWidth < -this.left + $containerWidth - padding) {
// tag in the current view
// eslint-disable-line
} else {
// tag in the right
this.left = -($targetLeft - ($containerWidth - $targetWidth) + padding)
}
}
}
}
</script>
<style rel="stylesheet/scss" lang="scss" scoped>
.scroll-container {
white-space: nowrap;
position: relative;
overflow: hidden;
width: 100%;
.scroll-wrapper {
position: absolute;
}
}
</style>
2、在相同目录下再新建一个TagsView.vue组件，把下面代码复制进去
<template>
<div class="tags-view-container">
<scroll-pane ref="scrollPane" class="tags-view-wrapper">
<router-link
v-for="tag in Array.from(visitedViews)"
ref="tag"
:key="tag.path"
:class="isActive(tag)?'active':''"
:to="tag"
class="tags-view-item"
@contextmenu.prevent.native="openMenu(tag,$event)"
>
{{ tag.title }}
<span class="el-icon-close" @click.prevent.stop="closeSelectedTag(tag)" />
</router-link>
</scroll-pane>
<ul v-show="visible" class="contextmenu" :style="{left:left+'px',top:top+'px'}">
<li @click="closeSelectedTag(selectedTag)">关闭</li>
<li @click="closeOthersTags">关闭其他</li>
<li @click="closeAllTags">关闭所有</li>
</ul>
</div>
</template>
<script>
import ScrollPane from './ScrollPane.vue'
export default {
name: 'TagsView',
components: { ScrollPane },
data() {
return {
visible: false,
top: 0,
left: 0,
selectedTag: {}
}
},
computed: {
visitedViews() {
return this.$store.state.tagsView.visitedViews
}
},
watch: {
$route() {
this.addViewTags()
this.moveToCurrentTag()
},
visible(value) {
if (value) {
document.body.addEventListener('click', this.closeMenu)
} else {
document.body.removeEventListener('click', this.closeMenu)
}
}
},
mounted() {
this.addViewTags()
},
methods: {
generateRoute() {
if (this.$route.name) {
return this.$route
}
return false
},
isActive(route) {
return route.path === this.$route.path
},
addViewTags() {
const route = this.generateRoute()
if (!route) {
return false
}
this.$store.dispatch('addVisitedViews', route)
},
moveToCurrentTag() {
const tags = this.$refs.tag
this.$nextTick(() => {
for (const tag of tags) {
if (tag.to.path === this.$route.path) {
this.$refs.scrollPane.moveToTarget(tag.$el)
break
}
}
})
},
closeSelectedTag(view) {
this.$store.dispatch('delVisitedViews', view).then((views) => {
if (this.isActive(view)) {
const latestView = views.slice(-1)[0]
if (latestView) {
this.$router.push(latestView)
} else {
this.$router.push('/')
}
}
})
},
closeOthersTags() {
this.$router.push(this.selectedTag)
this.$store.dispatch('delOthersViews', this.selectedTag).then(() => {
this.moveToCurrentTag()
})
},
closeAllTags() {
this.$store.dispatch('delAllViews')
this.$router.push('/')
},
openMenu(tag, e) {
this.visible = true
this.selectedTag = tag
const offsetLeft = this.$el.getBoundingClientRect().left // container margin left
this.left = e.clientX - offsetLeft + 15 // 15: margin right
this.top = e.clientY
},
closeMenu() {
this.visible = false
}
}
}
</script>
<style rel="stylesheet/scss" lang="scss" scoped>
.tags-view-container {
.tags-view-wrapper {
background: #fff;
height: 34px;
border-bottom: 1px solid #d8dce5;
box-shadow: 0 1px 3px 0 rgba(0, 0, 0, .12), 0 0 3px 0 rgba(0, 0, 0, .04);
.tags-view-item {
display: inline-block;
position: relative;
height: 26px;
line-height: 26px;
border: 1px solid #d8dce5;
color: #495060;
background: #fff;
padding: 0 8px;
font-size: 12px;
margin-left: 5px;
margin-top: 4px;
&:first-of-type {
margin-left: 15px;
}
&.active {
background-color: #42b983;
color: #fff;
border-color: #42b983;
&::before {
content: '';
background: #fff;
display: inline-block;
width: 8px;
height: 8px;
border-radius: 50%;
position: relative;
margin-right: 2px;
}
}
}
}
.contextmenu {
margin: 0;
background: #fff;
z-index: 100;
position: absolute;
list-style-type: none;
padding: 5px 0;
border-radius: 4px;
font-size: 12px;
font-weight: 400;
color: #333;
box-shadow: 2px 2px 3px 0 rgba(0, 0, 0, .3);
li {
margin: 0;
padding: 7px 16px;
cursor: pointer;
&:hover {
background: #eee;
}
}
}
}
</style>
<style rel="stylesheet/scss" lang="scss">
//reset element css of el-icon-close
.tags-view-wrapper {
.tags-view-item {
.el-icon-close {
width: 16px;
height: 16px;
vertical-align: 2px;
border-radius: 50%;
text-align: center;
transition: all .3s cubic-bezier(.645, .045, .355, 1);
transform-origin: 100% 50%;
&:before {
transform: scale(.6);
display: inline-block;
vertical-align: -3px;
}
&:hover {
background-color: #b4bccc;
color: #fff;
}
}
}
}
</style>
3、在store文件夹下新建一个tagsView.js，同样把复制代码进去
const tagsView = {
state: {
visitedViews: [],
cachedViews: []
},
mutations: {
ADD_VISITED_VIEWS: (state, view) => {
if (state.visitedViews.some(v => v.path === view.path)) return
state.visitedViews.push(Object.assign({}, view, {
title: view.meta.title || 'no-name'
}))
if (!view.meta.noCache) {
state.cachedViews.push(view.name)
}
},
DEL_VISITED_VIEWS: (state, view) => {
for (const [i, v] of state.visitedViews.entries()) {
if (v.path === view.path) {
state.visitedViews.splice(i, 1)
break
}
}
for (const i of state.cachedViews) {
if (i === view.name) {
const index = state.cachedViews.indexOf(i)
state.cachedViews.splice(index, 1)
break
}
}
},
DEL_OTHERS_VIEWS: (state, view) => {
for (const [i, v] of state.visitedViews.entries()) {
if (v.path === view.path) {
state.visitedViews = state.visitedViews.slice(i, i + 1)
break
}
}
for (const i of state.cachedViews) {
if (i === view.name) {
const index = state.cachedViews.indexOf(i)
state.cachedViews = state.cachedViews.slice(index, i + 1)
break
}
}
},
DEL_ALL_VIEWS: (state) => {
state.visitedViews = []
state.cachedViews = []
}
},
actions: {
addVisitedViews({ commit }, view) {
commit('ADD_VISITED_VIEWS', view)
},
delVisitedViews({ commit, state }, view) {
return new Promise((resolve) => {
commit('DEL_VISITED_VIEWS', view)
resolve([...state.visitedViews])
})
},
delOthersViews({ commit, state }, view) {
return new Promise((resolve) => {
commit('DEL_OTHERS_VIEWS', view)
resolve([...state.visitedViews])
})
},
delAllViews({ commit, state }) {
return new Promise((resolve) => {
commit('DEL_ALL_VIEWS')
resolve([...state.visitedViews])
})
}
}
}
export default tagsView
4、在store/index.js中引入tagsView.js
import Vue from 'vue'
import Vuex from 'vuex'
import getters from './getters'
// 自定义模块
import app from './modules/app'
import settings from './modules/settings'
import user from './modules/user'
import permission from './modules/permission'
import tagsView from './modules/tagsView'
Vue.use(Vuex)
const store = new Vuex.Store({
modules: {
app,
settings,
user,
permission,
tagsView
},
getters
})
export default store
5、在@/layout/的主组件中引入TagsView组件
二、实现重新返回页面时不刷新，保留原本页面内容
1、在@/layout/components/Sidebar下的AppMain.vue中添加如下代码
主要是通过keep-alive 和 router-view结合来实现
<template>
<section class="app-main">
<transition name="fade-transform" mode="out-in">
<keep-alive :include="cachedViews"> //这是新增加的
<router-view :key="key" />
</keep-alive> //
</transition>
</section>
</template>
<script>
export default {
name: 'AppMain',
computed: {
key() {
return this.$route.path
},
cachedViews() {//这是新增加的
return this.$store.state.tagsView.cachedViews
}//
}
}
</script>2、在route/index.js中为页面路由添加keepAlive为true，例如在首页
{
path: '/',
component: Layout,
redirect: '/dashboard',
children: [{
path: 'dashboard',
name: 'Dashboard',
component: () => import('@/views/dashboard/index'),
//在meta对象中添加key值keepAlive为true
meta: { title: '首页', icon: 'dashboard' ,keepAlive:true}
}]
}3、还有一点很重要！！要确保组件的命名和路由的命名是一样的，不然页面不会保留原本内容，会进行自动刷新
4、退出登录时，要清除缓存可以在store/modules/user.js中添加如下代码
import store from '..'
// user logout
logout({ commit, state }) {
return new Promise((resolve, reject) => {
logout().then(() => {
removeToken()
resetRouter()
store.dispatch('delAllViews') //增加多这行
commit('RESET_STATE')
resolve()
}).catch(error => {
reject(error)
})
})
},
最后，这是项目的目录结构，红色框是新建的文件，蓝色是修改增加的文件
