v-for="(item,index) in tabList" 代码解释
时间: 2024-03-02 09:29:30 浏览: 51
这是Vue.js中的一个指令,用于循环渲染列表。其中,v-for后面的表达式"tabList"是一个数组或可迭代对象,表示要循环的数据源。"(item, index)"是一个定义循环变量的语法,其中item表示当前遍历的元素,index表示当前遍历元素的索引。在循环体中,我们可以使用这些变量来动态渲染内容。例如,可以使用{{item}}来显示当前遍历元素的值。
相关问题
<scroll-view class="scroll-wrapper" scroll-x scroll-with-animation="true" scroll-into-view="item{{currentTab < 4 ? 0 : currentTab - 3}}"> <view class="navigate-item" id="item{{index}}" wx:for="{{tabList}}" wx:key="index" data-index="{{index}}" bindtap="tabNav"> <view class="names {{currentTab === index ? 'active' : ''}}">{{item.name}}</view> <view class="currtline {{currentTab === index ? 'active' : ''}}" wx:if="{{currentTab === index}}"></view> </view> </scroll-view> <swiper indicator-dots="{{false}}" bindchange="handleSwiper" current="{{currentTab}}"> <block wx:for="{{tabList}}" wx:key="index"> <swiper-item style="overflow: scroll;"> <view class="tab_title">tab{{currentTab+1}}内容</view> <scroll-view scroll-y refresher-enabled refresher-background="#F6F7F8" refresher-triggered="{{isRefresh}}" bindrefresherrefresh="refresherpulling" bindscrolltolower="handleTolower"> <view class="swiper-item" wx:for="{{20}}" wx:key="index">第{{index + 1}}条数据~</view> </scroll-view> </swiper-item> </block> </swiper> 将这段微信小程序代码转化成vue框架下的代码
<template>
<div>
<scroll-view class="scroll-wrapper" scroll-x scroll-with-animation="true" :scroll-into-view="`item${currentTab < 4 ? 0 : currentTab - 3}`">
<view class="navigate-item" :id="`item${index}`" v-for="(item, index) in tabList" :key="index" :data-index="index" @tap="tabNav">
<view class="names" :class="{ active: currentTab === index }">{{item.name}}</view>
<view class="currtline" :class="{ active: currentTab === index }" v-if="currentTab === index"></view>
</view>
</scroll-view>
<swiper :indicator-dots="false" @change="handleSwiper" :current="currentTab">
<swiper-item v-for="(item, index) in tabList" :key="index" style="overflow: scroll;">
<view class="tab_title">tab{{currentTab+1}}内容</view>
<scroll-view scroll-y refresher-enabled refresher-background="#F6F7F8" :refresher-triggered="isRefresh" @refresherrefresh="refresherpulling" @scrolltolower="handleTolower">
<view class="swiper-item" v-for="(item, index) in 20" :key="index">第{{index + 1}}条数据~</view>
</scroll-view>
</swiper-item>
</swiper>
</div>
</template>
<script>
export default {
data() {
return {
currentTab: 0,
isRefresh: false,
tabList: [{ name: 'tab1' }, { name: 'tab2' }, { name: 'tab3' }, { name: 'tab4' }, { name: 'tab5' }]
}
},
methods: {
tabNav(e) {
this.currentTab = e.currentTarget.dataset.index
},
handleSwiper(e) {
this.currentTab = e.detail.current
},
refresherpulling() {
// 下拉刷新
},
handleTolower() {
// 上拉加载更多
}
}
}
</script>
<view class="tabbox"> <view class="tabbox-tab"> <view class="" v-for="(item,index) in tablist" @click="tabqie(index)"> {{item.text}} </view> </view> data() { return { 下面是<script>部分 tablist:[{text:'门店'},{text:'线上购'}] methods: { // 搜索 onsearch(){}, // tab栏切换 tabqie(index){ if(index == '1') this.tabindex = 1 if(index == '0') this.tabindex = 0 console.log(this.tabindex); } 生成的tab栏怎么样可以在点击时变背景颜色和字体颜色,要怎么修改代码
您可以在 `<view>` 标签中添加一个 `class` 属性,用于标识当前选中的标签,例如:
```
<view class="tabbox-tab" :class="{active: tabindex===index}" v-for="(item,index) in tablist" @click="tabqie(index)">
{{item.text}}
</view>
```
然后在 CSS 中定义 `.active` 类的样式,例如:
```
.active {
background-color: #eee;
color: red;
}
```
这样,当点击某个标签时,它就会添加 `active` 类,就会应用样式。同时,您还需要在 `tabqie` 方法中设置当前选中的标签索引 `tabindex`。
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