vue轮播图_用vue实现一个仿简书的轮播图

时间: 2018-04-10阅读: 753标签: 轮播

先展示最终效果:


解决思路:

Vue的理念是以数据驱动视图,所以拒绝通过改变元素的margin-top来实现滚动效果。写好css样式,只需改变每张图片的class即可实现轮播效果。可以将轮播图看成两个,如图所示:


代码实现:

各个slide的样式: 

$width: 800px;      // 容器宽度
$height: 300px;     // 容器高度
$bWidth: 500px;     // 大图片宽度
$sWidth: $width - $bWidth;  // 小图片宽度
$sHeight: $height / 2;  // 小图片高度

#slider-wrapper{ width: $width; height: $height; margin: 0 auto; cursor: pointer; background: #ddd; border-radius: 5px; box-shadow: 0 1px 6px rgba(0,0,0,0.117647), 0 1px 4px rgba(0,0,0,0.117647); display: flex; overflow: hidden; div{ display: inline-block; } } .main-slide{ width: $bWidth; height: $height; float: left; transition: all .4s ease; } .extra-slide{ width: $sWidth; position: relative; .extra-slide-item{ position: absolute; width: $sWidth; height: $sHeight; left: 0; transition: .4s ease-out; } .extra-slide-top{ top: -$sHeight; } .extra-slide-middle-first{ top: 0; z-index: 2 } .extra-slide-middle-second{ top: $sHeight; z-index: 2 } .extra-slide-bottom{ top: $height } .extra-slide-hide{ display: none!important; } }

模板包含两个轮播图:

<div id="slider-wrapper" @mouseover="stop" @mouseout="start">
    <div class="main-slide" :style="background: url(${slideConfig[nowIndex].src})"></div>
    <div class="extra-slide">
        <div class="extra-slide-item" :class="slideClass(i)" v-for="(v, i) in slideConfig" :key="i" :style="background: url(${v.src}); background-size: cover"></div>
    </div>
</div>

scripts部分,设置一个nowIndex,定时改变nowIndex。所有图片的class根据这个nowIndex来变化,这里使用了es6的map类型:

import slideConfig from './slideConfig'
const slideLength = slideConfig.length
export default {
    name: 'slider',
    data: function() {
return { slideConfig: slideConfig, slideInterval: null, nowIndex: 0 } }, methods: { resetIndex(i) { return i > slideLength - 1 ? i - slideLength : i }, slideClass(i) { let nowIndex = this.nowIndex let map = new Map([ [this.resetIndex(nowIndex), 'extra-slide-top'], [this.resetIndex(nowIndex + 1), 'extra-slide-middle-first'], [this.resetIndex(nowIndex + 2), 'extra-slide-middle-second'], [this.resetIndex(nowIndex + 3), 'extra-slide-bottom'] ]) return map.get(i) ? map.get(i) : 'extra-slide-hide' }, start() { this.slideInterval = setInterval(() => { this.nowIndex = this.nowIndex > slideLength - 2 ? 0 : this.nowIndex + 1 console.log(this.nowIndex) }, 2000) }, stop() { clearInterval(this.slideInterval) this.slideInterval = null } }, mounted() { this.start() }, destroyed() { this.stop() } }

slideConfig,这里可以写成组件的props:

const prefix = '/src/assets/'
const slideConfig = [{
  src: prefix + 's1.jpg',
  title: '图1',
  desc: '说明1'
}, {
  src: prefix + 's2.jpg',
  title: '图2',
  desc: '说明2'
}, {
  src: prefix + 's3.jpg',
  title: '图3',
  desc: '说明3'
}, {
  src: prefix + 's4.jpg',
  title: '图4',
  desc: '说明4'
}, {
  src: prefix + 's5.jpg',
  title: '图5',
  desc: '说明5'
}, {
  src: prefix + 's6.jpg',
  title: '图6',
  desc: '说明6'
}]
export default slideConfig


gitHub传送门:https://github.com/bougieL/jianshuslider
原文地址:http://bougieblog.cn/article/54  


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