写这遍文章前自己也网上找了资料,发现这块资料极少,所以还是自己记录一下
项目需求是每个页面需要加上顶部导航栏,加返回事件
先写子组件代码,在components目录下建一个nav.vue文件:
子组件nav.vue文件内容
<template>
<div>
<el-affix position="top" :offset="0">
<div class="nav">
<span @click="backGo"><img src="../assets/back.png"/>返回</span>
<p>{
{title}}</p>
</div>
</el-affix>
</div>
</template>
<script setup>
import{ defineProps } from "vue"
const props =defineProps({ //子组件定义接收父组件传过来的值
title:String
})
//点击返回事件
const backGo = () => {
history.back()
}
</script>
<style scoped>
.nav{width: 100%;height:.6rem;display: flex;align-items: center;justify-content: center;text-align: center;position: relative;background-color: #ffffff;border-bottom: 1px solid #f0f0f0;}
.nav span{position: absolute;height:100%;left: .2rem;top: 0;display: flex;align-items: center;color: #8a8a8a;}
.nav span img{width: .32rem;}
</style>
父组件aboutus.vue文件:
<template>
<div class="wrap">
<Nav title="关于我们"></Nav> <!--记住这里第一个字母大写哦-->
<div class="lists">
<ul class="abus">
<li><p><router-link to="/company">公司介绍</router-link></p></li>
<li><p><router-link to="/privacy">隐私政策</router-link></p></li>
<li><p><router-link to="/useragree">用户协议</router-link></p></li>
</ul>
</div>
</div>
</template>
<script setup>
import Nav from '@/components/nav.vue'
</script>
记住引入子组件时,第一个字母大写哦 !
是不是很简单!
下面介绍子组件传值
同样是拿子组件nav.vue来测试,直接上代码:
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<template>
<div>
<el-affix position="top" :offset="0">
<div class="nav">
<span @click="backGo"><img src="../assets/back.png"/>返回</span>
<p>{
{title}}</p>
</div>
</el-affix>
</div>
</template>
<script setup>
import{ defineProps ,defineEmits} from "vue"
const emits =defineEmits(['getBackGo']) //注册父组件回调方法
const props =defineProps({
title:String
})
const backGo = () => {
// history.back()
emits("getBackGo","传个值给父组件!")
}
</script>
<style scoped>
.nav{width: 100%;height:.6rem;display: flex;align-items: center;justify-content: center;text-align: center;position: relative;background-color: #ffffff;border-bottom: 1px solid #f0f0f0;}
.nav span{position: absolute;height:100%;left: .2rem;top: 0;display: flex;align-items: center;color: #8a8a8a;}
.nav span img{width: .32rem;}
</style>
来看看父组件aboutus.vue写法:
<template>
<div class="wrap">
<Nav title="关于我们" @getBackGo="getBackGoInfo"></Nav>
<img src="../../assets/logo.jpg" class="logo"/>
<div class="lists">
<ul class="abus">
<li><p><router-link to="/company">公司介绍</router-link></p></li>
<li><p><router-link to="/privacy">隐私政策</router-link></p></li>
<li><p><router-link to="/useragree">用户协议</router-link></p></li>
</ul>
</div>
</div>
</template>
<script setup>
import Nav from '@/components/nav.vue'
const getBackGoInfo = (value) => {
console.log(value)
}
</script>
效果如下:
完美!