menu.jpg
遞歸簡介
含義：程序調(diào)用自身的編程技巧稱為遞歸枣耀，那組件調(diào)用自身就是組件遞歸
應(yīng)用場景：在實(shí)際業(yè)務(wù)開發(fā)中在扰，通常應(yīng)用于菜單欄缕减、樹組件、多級下拉框等
vue實(shí)現(xiàn)組件遞歸
調(diào)用效果及代碼
show1.png
<!--
* @Date: 2020-12-09 17:52:54
* @Author: surewinT 840325271@qq.com
* @LastEditTime: 2022-05-10 14:14:15
* @LastEditors: surewinT 840325271@qq.com
* @Description: 調(diào)用頁面
-->
<template>
<div class="">
<div v-for="(item, index) in testList" :key="index">
<Test :listitem="item" />
</div>
</div>
</template>
<script>
import Test from "./test.vue";
export default {
components: {
Test,
},
props: [],
data() {
return {
testList: [
{
name: "你好啊",
value: "1",
children: [
{
name: "你好啊",
value: "1-1",
},
{
name: "你好啊",
value: "1-2",
children: [
{
name: "你好啊",
value: "1-2-1",
},
],
},
],
},
{
name: "好的呢",
value: "2",
children: [],
},
],
};
},
mounted() {},
watch: {},
methods: {},
};
</script>
<style lang='scss' scoped>
.p-el-menu {
width: 200px;
}
</style>
組件遞歸案例
需要遞歸的組件芒珠，必須寫組件名name桥狡，可以在代碼中直接使用name進(jìn)行調(diào)用
<!--
* @Date: 2022-05-10 11:30:50
* @Author: surewinT 840325271@qq.com
* @LastEditTime: 2022-05-10 14:15:09
* @LastEditors: surewinT 840325271@qq.com
* @Description: 組件遞歸案例
-->
<template>
<div class="test-root">
{{ `${listitem.value}：${listitem.name}` }}
<div v-for="(item, index) in listitem.children" :key="index">
<!-- 直接使用自身組件 -->
<Test :listitem="item" />
</div>
</div>
</template>
<script>
export default {
// 必須寫name
name: "Test",
components: {},
props: ["listitem"],
data() {
return {};
},
mounted() {},
watch: {},
methods: {},
};
</script>
<style lang='scss' scoped>
.test-root {
padding: 20px;
display: inline-block;
border: 1px solid #409eff;
margin: 10px 0;
}
</style>
遞歸實(shí)現(xiàn)菜單欄
調(diào)用效果及代碼
show2.jpg
<!--
* @Date: 2020-12-09 17:52:54
* @Author: surewinT 840325271@qq.com
* @LastEditTime: 2022-05-10 14:20:32
* @LastEditors: surewinT 840325271@qq.com
* @Description: 調(diào)用頁面
-->
<template>
<div class="">
<el-menu class="p-el-menu">
<Menutree :menuList="menuList" />
</el-menu>
</div>
</template>
<script>
import Menutree from "./p-el-menu.vue";
export default {
components: {
Menutree,
},
props: [],
data() {
return {
menuList: [
{
label: "菜單1",
value: "1",
children: [
{
label: "菜單1-1",
value: "1-1",
},
{
label: "菜單1-2",
value: "1-2",
children: [
{
label: "菜單1-2-1",
value: "1-2-1",
},
],
},
],
},
{
label: "菜單2",
value: "2",
childern: [],
},
{
label: "菜單3",
value: "3",
children: [
{
label: "菜單3-1",
value: "3-1",
},
],
},
],
};
},
mounted() {},
watch: {},
methods: {},
};
</script>
<style lang='scss' scoped>
.p-el-menu {
width: 200px;
}
</style>
遞歸生成菜單
<!--
* @Date: 2022-05-10 11:45:08
* @Author: surewinT 840325271@qq.com
* @LastEditTime: 2022-05-10 14:28:58
* @LastEditors: surewinT 840325271@qq.com
* @Description: 遞歸生成菜單
-->
<template>
<div class="">
<div v-for="(menu, index) in menuList" :key="index">
<el-menu-item v-if="!menu.children || menu.children.length == 0" :index="menu.value">
<i :class="menu.icon ? menu.icon : 'el-icon-menu'"></i>
<span slot="title" class="group_title">{{ menu.label }}</span>
</el-menu-item>
<el-submenu v-else :index="menu.value">
<template slot="title">
<i :class="menu.icon ? menu.icon : 'el-icon-menu'"></i>
<span>{{ menu.label }}</span>
</template>
<!-- 遞歸自身 -->
<p-el-menu :menuList="menu.children" />
</el-submenu>
</div>
</div>
</template>
<script>
export default {
// 必須寫name
name: "p-el-menu",
components: {},
props: ["menuList"],
data() {
return {};
},
mounted() {},
watch: {},
methods: {},
};
</script>
<style lang='scss' scoped>
</style>
