vue的顶部菜单导航组件,可以传入n项,带切换动画的,底部是图片,也可以用代码写,接受传入自定义高亮索引
<template>
<van-sticky>
<div class="menu-bar">
<span
:class="item.value == activeValue ? 'active' : ''"
v-for="(item, index) in tabData"
:key="item.value"
@click="changeTab(item, index)"
>
{
{item.text}}
</span>
<img
class="menu-active"
src="../assets/tab-active.png"
:style="'width: 18px;transform: translateX(' + translateXdistence + 'px) translateX(-50%); transition-duration: 0.3s;'"
>
</div>
</van-sticky>
</template>
<script>
export default {
data() {
return {
translateXdistence: 0,
activeValue: '',
activeIndex: 1
};
},
props: {
// 菜单数组,严格接受数组内属性名text&value
tabData: {
type: Array,
default: []
},
// 接受默认选项索引的改变,从1开始计算
index: {
type: Number,
default: 1
}
},
created() {
},
mounted() {
this.computedX();
this.activeValue = this.tabData[this.index - 1].value || '';
this.activeIndex = this.index;
},
methods: {
changeTab (item, index) {
this.activeIndex = index + 1;
this.activeValue = item.value;
this.computedX();
this.$emit('changeTab', item);// 传给父组件 当前切换后的内容
},
// 计算初始化的选中图标位置
computedX () {
let allwidth = window.innerWidth;
let unitWidth = allwidth / this.tabData.length;
this.translateXdistence = this.activeIndex * unitWidth - unitWidth / 2;
}
}
};
</script>
<style lang="less">
.menu-bar {
color: #2D2F32;
width: 100%;
height: 88px;
line-height: 88px;
font-size: 28px;
display: flex;
justify-content: space-around;
background: #fff;
position: relative;
border-bottom: 12px solid #F1F3F4;
.menu-active {
position: absolute;
bottom: 0;
left: 0;
}
.active {
font-weight: 500;
}
}
</style>
父组件调用
<MenuBar :tabData="tabData" @changeTab="changeTab"></MenuBar>