1、目标效果
源码地址:multipal-layout-demo: vue2实现多布局+暗黑模式
默认布局:头部宽度100%,侧边栏、内容区
顶部布局:头部宽度100%,内容区
侧边栏布局:侧边栏高度100%,头部、内容区
2、原理分析
(1)vuex文件
import Vue from 'vue' import Vuex from 'vuex' Vue.use(Vuex) export default new Vuex.Store({ state: { // 暗黑模式 isDark: false, // 布局类型 layoutType: 'default' }, mutations: { // 修改暗黑模式 set_is_dark(state, val) { state.isDark = val }, // 修改布局类型 set_layout_type(state, val) { state.layoutType = val } }, actions: { }, modules: { } })
(2)布局缩略图如何实现?用div + css 手动实现布局样式
父组件传递一个布局类型数组,遍历此组件;用一个变量保存索引值,点击不同的布局类型项时切换索引并在vuex修改当前选中的布局类型
将缩略图封装成组件:Thumbnail.vue
<template> <!-- 缩略图 --> <div class="thumbnail"> <div class="layout" v-for="(item, index) in layouts" @click="changeCheck(item, index)"> <template v-if="item.type == 'default'"> <div class="top" :style="{ background: isDark ? 'black' : '#fff' }"></div> <div class="left" :style="{ background: isDark ? 'black' : '#fff' }"></div> </template> <template v-if="item.type == 'top'"> <div class="top" :style="{ background: isDark ? 'black' : '#fff' }"></div> </template> <template v-if="item.type == 'slide'"> <div class="top"></div> <div class="left" :style="{ background: isDark ? 'black' : '#fff' }"></div> </template> <i class="el-icon-check" v-show="checked == index"></i> </div> </div> </template> <script> import { mapState } from 'vuex' export default { props: { // 布局类型数组 layouts: { type: Array, default: () => [] } }, data() { return { // 当前选中值 checked: 0, } }, computed: { // 获取是否是暗黑模式,从而缩略图实现暗黑效果 ...mapState(['isDark']) }, methods: { // 切换选中值 changeCheck(item, index) { this.checked = index this.$store.commit('set_layout_type', item.type) } } } </script> <style lang="less" scoped> .thumbnail { display: flex; width: 100%; .layout { position: relative; width: 50px; height: 50px; border: 1px solid gray; overflow: hidden; background: #f0f0f0; border-radius: 5px; cursor: pointer; .top { position: absolute; left: 0; top: 0; width: 100%; height: 25%; } .left { position: absolute; left: 0; top: 0; bottom: 0; width: 25%; height: 100%; } .el-icon-check { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); font-size: 20px; } } } </style>
(3)建立多个不同类型的布局文件:
侧边栏布局 :src/views/layout/SlideLayout.vue
<template> <!-- 侧边栏布局 --> <div> <Sliderbar></Sliderbar> <Header></Header> <div class="content-box"> <router-view /> </div> </div> </template> <script> import Sliderbar from '@/components/Sliderbar.vue' import Header from '@/components/Header.vue' export default { components: { Header, Sliderbar, }, } </script> <style lang="less" scoped></style>
默认布局布局:src/views/layout/DefaultLayout.vue
<template> <!-- 默认布局 --> <div> <Header></Header> <Sliderbar></Sliderbar> <div class="content-box"> <router-view /> </div> </div> </template> <script> import Header from '@/components/Header.vue' import Sliderbar from '@/components/Sliderbar.vue' export default { components: { Header, Sliderbar }, } </script> <style lang="less" scoped></style>
顶部布局:src/views/layout/TopLayout.vue
<template> <!-- 顶栏布局 --> <div> <Header></Header> <div class="content-box"> <router-view /> </div> </div> </template> <script> import Header from '@/components/Header.vue' export default { components: { Header, }, } </script> <style lang="less" scoped></style>
(4)首页组件 Home.vue,Home.vue下面渲染二级路由
<template> <!-- vuex获取选中的布局类型 --> <div> <defaultLayout v-show="layoutType == 'default'"></defaultLayout> <slideLayout v-show="layoutType == 'slide'"></slideLayout> <topLayout v-show="layoutType == 'top'"></topLayout> </div> </template> <script> import defaultLayout from './layout/DefaultLayout.vue' import slideLayout from './layout/SlideLayout.vue' import topLayout from './layout/TopLayout.vue' import { mapState } from 'vuex' export default { components: { defaultLayout, slideLayout, topLayout }, computed: { ...mapState(['layoutType']) }, } </script> <style lang="less" scoped></style>
(5)暗黑模式、布局类型变量都是保存在vuex中,因为多个组件之间进行数据通信比较方便!通过mapState取出vuex数据,然后通过computed接受mapState值,但如果想要直接修改mapState中的值则会报以下的错误:
computed property "isDark" was assigned to but it has no setter.
这是因为computed为只读的。不能直接修改computed的数据,要想修改则使用set
computed: { ...mapState(['isDark']), // computed property "isDark" was assigned to but it has no setter. 这是因为computed为只读的。不能直接修改computed的数据,要想修改则使用set darkMode: { get() { return this.isDark }, set(val) { this.$store.commit('set_is_dark', val) // 获取html根元素标签 let html = document.documentElement if (val) { // html添加class="dark"选择器 html.classList.add('dark') } else { // html移除class="dark"选择器 html.classList.remove('dark') } } } },
版权声明:除特别声明外,本站所有文章皆是本站原创,转载请以超链接形式注明出处!