这段时间一直在捣鼓 Nuxt.js 项目，有个需求是实现类似探探卡片左右滑动切换功能。要求能实现左右手指拖动切换、点击按钮进行切换、拖拽回弹等功能。
如上图：最终展示效果
okay，下面就来简单的讲解下实现过程。
整体布局分为 顶部 headerbar 、卡片堆叠区域、底部 tabbar 三个部分。
<!-- //卡片页面模板 -->
<template>
<div>
<!-- >>顶部 -->
<header-bar :back="false" bgcolor="linear-gradient(to right, #00e0a1, #00a1ff)" fixed>
<div slot="title"><i class="iconfont icon-like c-red"></i> <em class="ff-gg">遇见 TA</em></div>
<div slot="right" class="ml-30" @click="showFilter = true"><i class="iconfont icon-filter"></i></div>
</header-bar>
<!-- >>主页面 -->
<div class="nuxt__scrollview scrolling flex1" ref="scrollview" style="background: linear-gradient(to right, #00e0a1, #00a1ff);">
<div class="nt__flipcard">
<div class="nt__stack-wrapper">
<flipcard ref="stack" :pages="stackList" @click="handleStackClicked"></flipcard>
</div>
<div class="nt__stack-control flexbox">
<button class="btn-ctrl prev" @click="handleStackPrev"><i class="iconfont icon-unlike "></i></button>
<button class="btn-ctrl next" @click="handleStackNext"><i class="iconfont icon-like "></i></button>
</div>
</div>
</div>
<!-- >>底部 tabbar -->
<tab-bar bgcolor="linear-gradient(to right, #00e0a1, #00a1ff)" color="#fff" />
</div>
</template>
点击右上角筛选按钮，在侧边会出现弹窗。里面的范围滑块、switch 开关、Rate 评分等组件则是使用 Vant 组件库。
<template>
<!-- ... -->
<!-- @@侧边栏弹框模板 -->
<v-popup v-model="showFilter" position="left" xclose xposition="left" title="高级筛选与设置">
<div class="flipcard-filter">
<div class="item nuxt-cell">
<label class="lbl">范围</label>
<div class="flex1">
<van-slider v-model="distanceRange" bar-height="2px" button-size="12px" active-color="#00e0a1" min="1" @input="handleDistanceRange" />
</div>
<em class="val">{{distanceVal}}</em>
</div>
<div class="item nuxt-cell">
<label class="lbl flex1">自动增加范围</label>
<em class="val"><van-switch v-model="autoExpand" size="20px" active-color="#00e0a1" /></em>
</div>
<div class="item nuxt-cell">
<label class="lbl flex1">性别</label>
<em class="val">女生</em>
</div>
<div class="item nuxt-cell">
<label class="lbl">好评度</label>
<div class="flex1"><van-rate v-model="starVal" color="#00e0a1" icon="like" void-icon="like-o" @change="handleStar" /></div>
<em class="val">{{starVal}}星</em>
</div>
<div class="item nuxt-cell">
<label class="lbl flex1">优先在线用户</label>
<em class="val"><van-switch v-model="firstOnline" size="20px" active-color="#00e0a1" /></em>
</div>
<div class="item nuxt-cell">
<label class="lbl flex1">优先新用户</label>
<em class="val"><van-switch v-model="firstNewUser" size="20px" active-color="#00e0a1" /></em>
</div>
<div class="item nuxt-cell mt-20">
<div class="mt-30 nuxt__btn nuxt__btn-primary--gradient" style="height:38px;"><i class="iconfont icon-filter"></i> 更新</div>
</div>
</div>
</v-popup>
</template>
<script>
export default {
// 用于配置应用默认的 meta 标签
head() {
return {
title: `${this.title} - 翻一翻`,
meta: [
{name:'keywords',hid: 'keywords',content:`${this.title} | 翻一翻 | 翻动卡片`},
{name:'description',hid:'description',content:`${this.title} | 仿探探卡片翻动`}
]
}
},
middleware: 'auth',
data () {
return {
title: 'Nuxt',
showFilter: false,
distanceRange: 1,
distanceVal: '<1km',
autoExpand: true,
starVal: 5,
firstOnline: false,
firstNewUser: true,
// ...
}
},
methods: {
/* @@左侧筛选函数 */
// 范围选择
handleDistanceRange(val) {
if(val == 1) {
this.distanceVal = '<1km';
} else if (val == 100) {
this.distanceVal = "100km+"
}else {
this.distanceVal = val+'km';
}
},
// 好评度
handleStar(val) {
this.starVal = val;
},
// ...
},
}
</script>
其中卡片堆叠区单独封装了一个 flipcard.vue 组件，只需传入 pages 数据就可以。
<flipcard ref="stack" :pages="stackList"></flipcard>
在卡片的四角拖拽卡片，会出现不同程度的斜切视角。
pages 支持传入的参数
module.exports = [
{
avatar: '/assets/img/avatar02.jpg',
name: '放荡不羁爱自由',
sex: 'female',
age: 23,
starsign: '天秤座',
distance: '艺术 /健身',
photos: [...],
sign: '交个朋友，非诚勿扰'
},
...
]
堆叠卡片模板
<template>
<ul class="stack">
<li class="stack-item" v-for="(item, index) in pages" :key="index" :style="[transformIndex(index),transform(index)]"
@touchmove.stop.capture="touchmove"
@touchstart.stop.capture="touchstart"
@touchend.stop.capture="touchend($event, index)"
@touchcancel.stop.capture="touchend($event, index)"
@mousedown.stop.capture.prevent="touchstart"
@mouseup.stop.capture.prevent="touchend($event, index)"
@mousemove.stop.capture.prevent="touchmove"
@mouseout.stop.capture.prevent="touchend($event, index)"
@webkit-transition-end="onTransitionEnd(index)"
@transitionend="onTransitionEnd(index)"
>
<img :src="item.avatar" />
<div class="stack-info">
<h2 class="name">{{item.name}}</h2>
<p class="tags">
<span class="sex" :class="item.sex"><i class="iconfont" :class="'icon-'+item.sex"></i> {{item.age}}</span>
<span class="xz">{{item.starsign}}</span>
</p>
<p class="distance">{{item.distance}}</p>
</div>
</li>
</ul>
</template>
/**
* @Desc Vue 仿探探|Tinder 卡片滑动 FlipCard
* @Time andy by 2020-10-06
* @About Q：282310962 wx：xy190310
*/
<script>
export default {
props: {
pages: {
type: Array,
default: {}
}
},
data () {
return {
basicdata: {
start: {},
end: {}
},
temporaryData: {
isStackClick: true,
offsetY: '',
poswidth: 0,
posheight: 0,
lastPosWidth: '',
lastPosHeight: '',
lastZindex: '',
rotate: 0,
lastRotate: 0,
visible: 3,
tracking: false,
animation: false,
currentPage: 0,
opacity: 1,
lastOpacity: 0,
swipe: false,
zIndex: 10
}
}
},
computed: {
// 划出面积比例
offsetRatio () {
let width = this.$el.offsetWidth
let height = this.$el.offsetHeight
let offsetWidth = width - Math.abs(this.temporaryData.poswidth)
let offsetHeight = height - Math.abs(this.temporaryData.posheight)
let ratio = 1 - (offsetWidth * offsetHeight) / (width * height) || 0
return ratio > 1 ? 1 : ratio
},
// 划出宽度比例
offsetWidthRatio () {
let width = this.$el.offsetWidth
let offsetWidth = width - Math.abs(this.temporaryData.poswidth)
let ratio = 1 - offsetWidth / width || 0
return ratio
}
},
methods: {
touchstart (e) {
if (this.temporaryData.tracking) {
return
}
// 是否为 touch
if (e.type === 'touchstart') {
if (e.touches.length > 1) {
this.temporaryData.tracking = false
return
} else {
// 记录起始位置
this.basicdata.start.t = new Date().getTime()
this.basicdata.start.x = e.targetTouches[0].clientX
this.basicdata.start.y = e.targetTouches[0].clientY
this.basicdata.end.x = e.targetTouches[0].clientX
this.basicdata.end.y = e.targetTouches[0].clientY
// offsetY 在 touch 事件中没有，只能自己计算
this.temporaryData.offsetY = e.targetTouches[0].pageY - this.$el.offsetParent.offsetTop
}
// pc 操作
} else {
this.basicdata.start.t = new Date().getTime()
this.basicdata.start.x = e.clientX
this.basicdata.start.y = e.clientY
this.basicdata.end.x = e.clientX
this.basicdata.end.y = e.clientY
this.temporaryData.offsetY = e.offsetY
}
this.temporaryData.isStackClick = true
this.temporaryData.tracking = true
this.temporaryData.animation = false
},
touchmove (e) {
this.temporaryData.isStackClick = false
// 记录滑动位置
if (this.temporaryData.tracking && !this.temporaryData.animation) {
if (e.type === 'touchmove') {
e.preventDefault()
this.basicdata.end.x = e.targetTouches[0].clientX
this.basicdata.end.y = e.targetTouches[0].clientY
} else {
e.preventDefault()
this.basicdata.end.x = e.clientX
this.basicdata.end.y = e.clientY
}
// 计算滑动值
this.temporaryData.poswidth = this.basicdata.end.x - this.basicdata.start.x
this.temporaryData.posheight = this.basicdata.end.y - this.basicdata.start.y
let rotateDirection = this.rotateDirection()
let angleRatio = this.angleRatio()
this.temporaryData.rotate = rotateDirection * this.offsetWidthRatio * 15 * angleRatio
}
},
touchend (e, index) {
if(this.temporaryData.isStackClick) {
this.$emit('click', index)
this.temporaryData.isStackClick = false
}
this.temporaryData.isStackClick = true
this.temporaryData.tracking = false
this.temporaryData.animation = true
// 滑动结束，触发判断
// 判断划出面积是否大于 0.4
if (this.offsetRatio >= 0.4) {
// 计算划出后最终位置
let ratio = Math.abs(this.temporaryData.posheight / this.temporaryData.poswidth)
this.temporaryData.poswidth = this.temporaryData.poswidth >= 0 ? this.temporaryData.poswidth + 200 : this.temporaryData.poswidth - 200
this.temporaryData.posheight = this.temporaryData.posheight >= 0 ? Math.abs(this.temporaryData.poswidth * ratio) : -Math.abs(this.temporaryData.poswidth * ratio)
this.temporaryData.opacity = 0
this.temporaryData.swipe = true
this.nextTick()
// 不满足条件则滑入
} else {
this.temporaryData.poswidth = 0
this.temporaryData.posheight = 0
this.temporaryData.swipe = false
this.temporaryData.rotate = 0
}
},
nextTick () {
// 记录最终滑动距离
this.temporaryData.lastPosWidth = this.temporaryData.poswidth
this.temporaryData.lastPosHeight = this.temporaryData.posheight
this.temporaryData.lastRotate = this.temporaryData.rotate
this.temporaryData.lastZindex = 20
// 循环 currentPage
this.temporaryData.currentPage = this.temporaryData.currentPage === this.pages.length - 1 ? 0 : this.temporaryData.currentPage + 1
// currentPage 切换，整体 dom 进行变化，把第一层滑动置最低
this.$nextTick(() => {
this.temporaryData.poswidth = 0
this.temporaryData.posheight = 0
this.temporaryData.opacity = 1
this.temporaryData.rotate = 0
})
},
onTransitionEnd (index) {
let lastPage = this.temporaryData.currentPage === 0 ? this.pages.length - 1 : this.temporaryData.currentPage - 1
// dom 发生变化正在执行的动画滑动序列已经变为上一层
if (this.temporaryData.swipe && index === lastPage) {
this.temporaryData.animation = true
this.temporaryData.lastPosWidth = 0
this.temporaryData.lastPosHeight = 0
this.temporaryData.lastOpacity = 0
this.temporaryData.lastRotate = 0
this.temporaryData.swipe = false
this.temporaryData.lastZindex = -1
}
},
prev () {
this.temporaryData.tracking = false
this.temporaryData.animation = true
// 计算划出后最终位置
let width = this.$el.offsetWidth
this.temporaryData.poswidth = -width
this.temporaryData.posheight = 0
this.temporaryData.opacity = 0
this.temporaryData.rotate = '-3'
this.temporaryData.swipe = true
this.nextTick()
},
next () {
this.temporaryData.tracking = false
this.temporaryData.animation = true
// 计算划出后最终位置
let width = this.$el.offsetWidth
this.temporaryData.poswidth = width
this.temporaryData.posheight = 0
this.temporaryData.opacity = 0
this.temporaryData.rotate = '3'
this.temporaryData.swipe = true
this.nextTick()
},
rotateDirection () {
if (this.temporaryData.poswidth <= 0) {
return -1
} else {
return 1
}
},
angleRatio () {
let height = this.$el.offsetHeight
let offsetY = this.temporaryData.offsetY
let ratio = -1 * (2 * offsetY / height - 1)
return ratio || 0
},
inStack (index, currentPage) {
let stack = []
let visible = this.temporaryData.visible
let length = this.pages.length
for (let i = 0; i < visible; i++) {
if (currentPage + i < length) {
stack.push(currentPage + i)
} else {
stack.push(currentPage + i - length)
}
}
return stack.indexOf(index) >= 0
},
// 非首页样式切换
transform (index) {
let currentPage = this.temporaryData.currentPage
let length = this.pages.length
let lastPage = currentPage === 0 ? this.pages.length - 1 : currentPage - 1
let style = {}
let visible = this.temporaryData.visible
if (index === this.temporaryData.currentPage) {
return
}
if (this.inStack(index, currentPage)) {
let perIndex = index - currentPage > 0 ? index - currentPage : index - currentPage + length
style['opacity'] = '1'
style['transform'] = 'translate3D(0,0,' + -1 * 60 * (perIndex - this.offsetRatio) + 'px' + ')'
style['zIndex'] = visible - perIndex
if (!this.temporaryData.tracking) {
style['transitionTimingFunction'] = 'ease'
style['transitionDuration'] = 300 + 'ms'
}
} else if (index === lastPage) {
style['transform'] = 'translate3D(' + this.temporaryData.lastPosWidth + 'px' + ',' + this.temporaryData.lastPosHeight + 'px' + ',0px) ' + 'rotate(' + this.temporaryData.lastRotate + 'deg)'
style['opacity'] = this.temporaryData.lastOpacity
style['zIndex'] = this.temporaryData.lastZindex
style['transitionTimingFunction'] = 'ease'
style['transitionDuration'] = 300 + 'ms'
} else {
style['zIndex'] = '-1'
style['transform'] = 'translate3D(0,0,' + -1 * visible * 60 + 'px' + ')'
}
return style
},
// 首页样式切换
transformIndex (index) {
if (index === this.temporaryData.currentPage) {
let style = {}
style['transform'] = 'translate3D(' + this.temporaryData.poswidth + 'px' + ',' + this.temporaryData.posheight + 'px' + ',0px) ' + 'rotate(' + this.temporaryData.rotate + 'deg)'
style['opacity'] = this.temporaryData.opacity
style['zIndex'] = 10
if (this.temporaryData.animation) {
style['transitionTimingFunction'] = 'ease'
style['transitionDuration'] = (this.temporaryData.animation ? 300 : 0) + 'ms'
}
return style
}
},
}
}
</script>
点击卡片会直接跳转到详细页面。
ok，基于 Vue.js|Nuxt.js 实现卡片拖拽切换效果就分享到这里。希望能喜欢~~
作者：xiaoyan2017
链接： https://segmentfault.com/a/1190000037446858
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