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js_脚本之家,用vue写一个仿简书的轮播图

2020年3月27日 - 澳门太阳娱乐手机登录
js_脚本之家,用vue写一个仿简书的轮播图

1.先体现最后效果:

先出示最终效果:

2.缓慢解决思路

图片 1

Vue的见解是以数量驱动视图,所以谢绝通过改动成分的margin-top来落到实处滚动作效果应。写好css样式,只需改换每张图片的class就可以实现轮播效果。动漫效果交给transition完毕。能够将轮播图看成三个,各种图片的职位如图所示:

222.gif

js_脚本之家,用vue写一个仿简书的轮播图。3.代码贯彻

Vue的理念是以数量驱动视图,所以否决通过改变成分的margin-top来促成滚动效应。写好css样式,只需改造每张图纸的class就能够实现轮播效果。能够将轮播图看成七个,如图所示:

各个slide的样式:

图片 2

$width: 800px; // 容器宽度$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 1px 4px rgba; 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; }}

333.png

scripts部分,设置八个nowIndex,定时改动nowIndex。全数图片的class依照这么些nowIndex来变化,这里运用了es6的map类型,详细情形点击://www.jb51.net/article/111734.htm

写好每种class的样式:

export default { name: 'slider', data: function() { return { slideInterval: null, nowIndex: 0, slideLength: this.slideConfig.length } }, props: { slideConfig: { type: Array } }, methods: { // 限制index不能超出图片列表长度 resetIndex { return i > this.slideLength - 1 ? i - this.slideLength : i }, slideClass { let nowIndex = this.nowIndex // Map就是key也可以是非字符串的对象,不用Map多写几个 if else 也可以 let map = new Map([ [this.resetIndex, 'extra-slide-top'], [this.resetIndex, 'extra-slide-middle-first'], [this.resetIndex, 'extra-slide-middle-second'], [this.resetIndex, 'extra-slide-bottom'] ]) // 图片的class根据nowIndex的变化而变化 return map.get : 'extra-slide-hide' }, start() { // 定时改变nowIndex this.slideInterval = setInterval => { this.nowIndex = this.nowIndex > this.slideLength - 2 ? 0 : this.nowIndex + 1 console.log }, 2000) }, stop() { clearInterval this.slideInterval = null } }, mounted }, destroyed }}
$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;
    }
}

slideConfig,组件的props:

模板富含八个轮播图:

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
<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>

2018/3/12 16:55 : slideConfig已修改成Props,提取slider.vue就能够直接用了

scripts部分,设置一个nowIndex,依期退换nowIndex。全部图片的class依据这几个nowIndex来扭转:

gitHub传送门:

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()
    }
}

以上正是本文的全体内容,希望对大家的读书抱有利于,也期望我们不吝指教脚本之家。

slideConfig,这里能够写成组件的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

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