使用vue制作探探滑動堆疊組件的實例代碼

更新時間：2018年03月07日 08:51:22 作者：warpcgd

探探的堆疊滑動組件起到了關(guān)鍵的作用，下面就來看看如何用vue寫一個探探的堆疊組件，感興趣的朋友一起看看吧

效果圖如下所示：

前言

嗨，說起探探想必各位程序汪都不陌生(畢竟妹子很多)，能在上面絲滑的翻牌子，探探的的堆疊滑動組件起到了關(guān)鍵的作用，下面就來看看如何用vue寫一個探探的堆疊組件

一. 功能分析

簡單使用下探探會發(fā)現(xiàn)，堆疊滑動的功能很簡單，用一張圖概括就是:

簡單歸納下里面包含的基本功能點(diǎn):

圖片的堆疊
圖片第一張的滑動
條件成功后的滑出，條件失敗后的回彈
滑出后下一張圖片堆疊到頂部
體驗優(yōu)化
根據(jù)觸摸點(diǎn)的不同，滑動時首圖有不同角度偏移
偏移面積判定是否成功滑出

二. 具體實現(xiàn)

有了歸納好的功能點(diǎn)，我們實現(xiàn)組件的思路會更清晰

1. 堆疊效果

堆疊圖片效果在網(wǎng)上有大量的實例，實現(xiàn)的方法大同小異，主要通過在父層設(shè)定perspective 及perspective-origin ，來實現(xiàn)子層的透視，子層設(shè)定好translate3d Z軸數(shù)值即可模擬出堆疊效果，具體代碼如下

// 圖片堆疊dom
 <!--opacity: 0 隱藏我們不想看到的stack-item層級-->
 <!--z-index: -1 調(diào)整stack-item層級"-->
<ul class="stack">
 <li class="stack-item" style="transform: translate3d(0px, 0px, 0px);opacity: 1;z-index: 10;"><img src="1.png" alt="01"></li>
 <li class="stack-item" style="transform: translate3d(0px, 0px, -60px);opacity: 1;z-index: 1"><img src="2.png" alt="02"></li>
 <li class="stack-item" style="transform: translate3d(0px, 0px, -120px);opacity: 1;z-index: 1"><img src="3.png" alt="03"></li>
 <li class="stack-item" style="transform: translate3d(0px, 0px, -180px);opacity: 0;z-index: -1"><img src="4.png" alt="04"></li>
 <li class="stack-item" style="transform: translate3d(0px, 0px, -180px);opacity: 0;z-index: -1"><img src="5.png" alt="05"></li>
</ul>
<style>
.stack {
 width: 100%;
 height: 100%;
 position: relative;
 perspective: 1000px; //子元素視距
 perspective-origin: 50% 150%; //子元素透視位置
 -webkit-perspective: 1000px;
 -webkit-perspective-origin: 50% 150%;
 margin: 0;
 padding: 0;
 }
 .stack-item{
 background: #fff;
 height: 100%;
 width: 100%;
 border-radius: 4px;
 text-align: center;
 overflow: hidden;
 }
 .stack-item img {
 width: 100%;
 display: block;
 pointer-events: none;
 }
</style>

上面只是一組靜態(tài)代碼，我們希望得到的是vue組件，所以需要先建立一個組件模板stack.vue，在模板中我們可以使用v-for，遍歷出stack節(jié)點(diǎn)，使用:style 來修改各個item的style，代碼如下

<template>
 <ul class="stack">
  <li class="stack-item" v-for="(item, index) in pages" :style="[transform(index)]">
  <img :src="item.src">
  </li>
 </ul>
</template>
<script>
export default {
 props: {
 // pages數(shù)據(jù)包含基礎(chǔ)的圖片數(shù)據(jù)
 pages: {
  type: Array,
  default: []
 }
 },
 data () {
 return {
  // basicdata數(shù)據(jù)包含組件基本數(shù)據(jù)
  basicdata: {
  currentPage: 0 // 默認(rèn)首圖的序列
  },
  // temporaryData數(shù)據(jù)包含組件臨時數(shù)據(jù)
  temporaryData: {
  opacity: 1, // 記錄opacity
  zIndex: 10, // 記錄zIndex
  visible: 3 // 記錄默認(rèn)顯示堆疊數(shù)visible
  }
 }
 },
 methods: {
 // 遍歷樣式
 transform (index) {
  if (index >= this.basicdata.currentPage) {
  let style = {}
  let visible = this.temporaryData.visible
  let perIndex = index - this.basicdata.currentPage
  // visible可見數(shù)量前滑塊的樣式
  if (index <= this.basicdata.currentPage + visible - 1) {
   style['opacity'] = '1'
   style['transform'] = 'translate3D(0,0,' + -1 * perIndex * 60 + 'px' + ')'
   style['zIndex'] = visible - index + this.basicdata.currentPage
   style['transitionTimingFunction'] = 'ease'
   style['transitionDuration'] = 300 + 'ms'
  } else {
   style['zIndex'] = '-1'
   style['transform'] = 'translate3D(0,0,' + -1 * visible * 60 + 'px' + ')'
  }
  return style
  }
 }
 }
}
</script>

關(guān)鍵點(diǎn)

:style 可以綁定對象的同時，也可以綁定數(shù)組和函數(shù)，這在遍歷的時候很有用
最基本的dom結(jié)構(gòu)已經(jīng)構(gòu)建完畢，下一步是讓首張圖片“動”起來

2. 圖片滑動

圖片滑動效果，在很多場景中都有出現(xiàn)，其原理無非是監(jiān)聽touchs事件，得到位移，再通過translate3D改變目標(biāo)位移，因此我們要實現(xiàn)的步驟如下

對stack進(jìn)行touchs事件的綁定
監(jiān)聽并儲存手勢位置變化的數(shù)值
改變首圖css屬性中translate3D的x，y值

#### 具體實現(xiàn)

在vue框架中，不建議直接操作節(jié)點(diǎn)，而是通過指令v-on對元素進(jìn)行綁定，因此我們將綁定都寫在v-for遍歷里，通過index進(jìn)行判斷其是否是首圖，再使用:style修改首頁的樣式，具體代碼如下:

<template>
 <ul class="stack">
  <li class="stack-item" v-for="(item, index) in pages"
  :style="[transformIndex(index),transform(index)]"
  @touchstart.stop.capture="touchstart"
  @touchmove.stop.capture="touchmove"
  @touchend.stop.capture="touchend"
  @mousedown.stop.capture="touchstart"
  @mouseup.stop.capture="touchend"
  @mousemove.stop.capture="touchmove">
  <img :src="item.src">
  </li>
 </ul>
</template>
<script>
export default {
 props: {
 // pages數(shù)據(jù)包含基礎(chǔ)的圖片數(shù)據(jù)
 pages: {
  type: Array,
  default: []
 }
 },
 data () {
 return {
  // basicdata數(shù)據(jù)包含組件基本數(shù)據(jù)
  basicdata: {
  start: {}, // 記錄起始位置
  end: {}, // 記錄終點(diǎn)位置
  currentPage: 0 // 默認(rèn)首圖的序列
  },
  // temporaryData數(shù)據(jù)包含組件臨時數(shù)據(jù)
  temporaryData: {
  poswidth: '', // 記錄位移
  posheight: '', // 記錄位移
  tracking: false // 是否在滑動，防止多次操作，影響體驗
  }
 }
 },
 methods: {
 touchstart (e) {
  if (this.temporaryData.tracking) {
  return
  }
  // 是否為touch
  if (e.type === 'touchstart') {
  if (e.touches.length > 1) {
   this.temporaryData.tracking = false
   return
  } else {
   // 記錄起始位置
   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
  }
  // 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.tracking = true
 },
 touchmove (e) {
  // 記錄滑動位置
  if (this.temporaryData.tracking && !this.temporaryData.animation) {
  if (e.type === 'touchmove') {
   this.basicdata.end.x = e.targetTouches[0].clientX
   this.basicdata.end.y = e.targetTouches[0].clientY
  } else {
   this.basicdata.end.x = e.clientX
   this.basicdata.end.y = e.clientY
  }
  // 計算滑動值
  this.temporaryData.poswidth = this.basicdata.end.x - this.basicdata.start.x
  this.temporaryData.posheight = this.basicdata.end.y - this.basicdata.start.y
  }
 },
 touchend (e) {
  this.temporaryData.tracking = false
  // 滑動結(jié)束，觸發(fā)判斷
 },
 // 非首頁樣式切換
 transform (index) {
  if (index > this.basicdata.currentPage) {
  let style = {}
  let visible = 3
  let perIndex = index - this.basicdata.currentPage
  // visible可見數(shù)量前滑塊的樣式
  if (index <= this.basicdata.currentPage + visible - 1) {
   style['opacity'] = '1'
   style['transform'] = 'translate3D(0,0,' + -1 * perIndex * 60 + 'px' + ')'
   style['zIndex'] = visible - index + this.basicdata.currentPage
   style['transitionTimingFunction'] = 'ease'
   style['transitionDuration'] = 300 + 'ms'
  } else {
   style['zIndex'] = '-1'
   style['transform'] = 'translate3D(0,0,' + -1 * visible * 60 + 'px' + ')'
  }
  return style
  }
 },
 // 首頁樣式切換
 transformIndex (index) {
  // 處理3D效果
  if (index === this.basicdata.currentPage) {
  let style = {}
  style['transform'] = 'translate3D(' + this.temporaryData.poswidth + 'px' + ',' + this.temporaryData.posheight + 'px' + ',0px)'
  style['opacity'] = 1
  style['zIndex'] = 10
  return style
  }
 }
 }
}
</script>

3. 條件成功后的滑出，條件失敗后的回彈

條件的觸發(fā)判斷是在touchend/mouseup后進(jìn)行，在這里我們先用簡單的條件進(jìn)行判定，同時給予首圖彈出及回彈的效果，代碼如下

<template>
 <ul class="stack">
  <li class="stack-item" v-for="(item, index) in pages"
  :style="[transformIndex(index),transform(index)]"
  @touchmove.stop.capture="touchmove"
  @touchstart.stop.capture="touchstart"
  @touchend.stop.capture="touchend"
  @mousedown.stop.capture="touchstart"
  @mouseup.stop.capture="touchend"
  @mousemove.stop.capture="touchmove">
  <img :src="item.src">
  </li>
 </ul>
</template>
<script>
export default {
 props: {
  // pages數(shù)據(jù)包含基礎(chǔ)的圖片數(shù)據(jù)
 pages: {
  type: Array,
  default: []
 }
 },
 data () {
 return {
  // basicdata數(shù)據(jù)包含組件基本數(shù)據(jù)
  basicdata: {
  start: {}, // 記錄起始位置
  end: {}, // 記錄終點(diǎn)位置
  currentPage: 0 // 默認(rèn)首圖的序列
  },
  // temporaryData數(shù)據(jù)包含組件臨時數(shù)據(jù)
  temporaryData: {
  poswidth: '', // 記錄位移
  posheight: '', // 記錄位移
  tracking: false, // 是否在滑動，防止多次操作，影響體驗
  animation: false, // 首圖是否啟用動畫效果，默認(rèn)為否
  opacity: 1 // 記錄首圖透明度
  }
 }
 },
 methods: {
 touchstart (e) {
  if (this.temporaryData.tracking) {
  return
  }
  // 是否為touch
  if (e.type === 'touchstart') {
  if (e.touches.length > 1) {
   this.temporaryData.tracking = false
   return
  } else {
   // 記錄起始位置
   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
  }
  // 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.tracking = true
  this.temporaryData.animation = false
 },
 touchmove (e) {
  // 記錄滑動位置
  if (this.temporaryData.tracking && !this.temporaryData.animation) {
  if (e.type === 'touchmove') {
   this.basicdata.end.x = e.targetTouches[0].clientX
   this.basicdata.end.y = e.targetTouches[0].clientY
  } else {
   this.basicdata.end.x = e.clientX
   this.basicdata.end.y = e.clientY
  }
  // 計算滑動值
  this.temporaryData.poswidth = this.basicdata.end.x - this.basicdata.start.x
  this.temporaryData.posheight = this.basicdata.end.y - this.basicdata.start.y
  }
 },
 touchend (e) {
  this.temporaryData.tracking = false
  this.temporaryData.animation = true
  // 滑動結(jié)束，觸發(fā)判斷
  // 簡單判斷滑動寬度超出100像素時觸發(fā)滑出
  if (Math.abs(this.temporaryData.poswidth) >= 100) {
  // 最終位移簡單設(shè)定為x軸200像素的偏移
  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
  // 不滿足條件則滑入
  } else {
  this.temporaryData.poswidth = 0
  this.temporaryData.posheight = 0
  }
 },
 // 非首頁樣式切換
 transform (index) {
  if (index > this.basicdata.currentPage) {
  let style = {}
  let visible = 3
  let perIndex = index - this.basicdata.currentPage
  // visible可見數(shù)量前滑塊的樣式
  if (index <= this.basicdata.currentPage + visible - 1) {
   style['opacity'] = '1'
   style['transform'] = 'translate3D(0,0,' + -1 * perIndex * 60 + 'px' + ')'
   style['zIndex'] = visible - index + this.basicdata.currentPage
   style['transitionTimingFunction'] = 'ease'
   style['transitionDuration'] = 300 + 'ms'
  } else {
   style['zIndex'] = '-1'
   style['transform'] = 'translate3D(0,0,' + -1 * visible * 60 + 'px' + ')'
  }
  return style
  }
 },
 // 首頁樣式切換
 transformIndex (index) {
  // 處理3D效果
  if (index === this.basicdata.currentPage) {
  let style = {}
  style['transform'] = 'translate3D(' + this.temporaryData.poswidth + 'px' + ',' + this.temporaryData.posheight + 'px' + ',0px)'
  style['opacity'] = this.temporaryData.opacity
  style['zIndex'] = 10
  if (this.temporaryData.animation) {
   style['transitionTimingFunction'] = 'ease'
   style['transitionDuration'] = 300 + 'ms'
  }
  return style
  }
 }
 }
}
</script>

4. 滑出后下一張圖片堆疊到頂部

重新堆疊是組件最后一個功能，同時也是最重要和復(fù)雜的功能。在我們的代碼里，stack-item的排序依賴綁定:style的transformIndex和transform函數(shù)，函數(shù)里判定的條件是currentPage，那是不是改變currentPage，讓其+1，即可完成重新堆疊呢？

答案沒有那么簡單，因為我們滑出是動畫效果，會進(jìn)行300ms的時間，而currentPage變化引起的重排，會立即變化，打斷動畫的進(jìn)行。因此我們需要先修改transform函數(shù)的排序條件，后改變currentPage。

#### 具體實現(xiàn)

修改transform函數(shù)排序條件
讓currentPage+1
添加onTransitionEnd事件，在滑出結(jié)束后，重新放置stack列表中

代碼如下：

<template>
 <ul class="stack">
  <li class="stack-item" v-for="(item, index) in pages"
  :style="[transformIndex(index),transform(index)]"
  @touchmove.stop.capture="touchmove"
  @touchstart.stop.capture="touchstart"
  @touchend.stop.capture="touchend"
  @mousedown.stop.capture="touchstart"
  @mouseup.stop.capture="touchend"
  @mousemove.stop.capture="touchmove"
  @webkit-transition-end="onTransitionEnd"
  @transitionend="onTransitionEnd"
  >
  <img :src="item.src">
  </li>
 </ul>
</template>
<script>
export default {
 props: {
 // pages數(shù)據(jù)包含基礎(chǔ)的圖片數(shù)據(jù)
 pages: {
  type: Array,
  default: []
 }
 },
 data () {
 return {
  // basicdata數(shù)據(jù)包含組件基本數(shù)據(jù)
  basicdata: {
  start: {}, // 記錄起始位置
  end: {}, // 記錄終點(diǎn)位置
  currentPage: 0 // 默認(rèn)首圖的序列
  },
  // temporaryData數(shù)據(jù)包含組件臨時數(shù)據(jù)
  temporaryData: {
  poswidth: '', // 記錄位移
  posheight: '', // 記錄位移
  lastPosWidth: '', // 記錄上次最終位移
  lastPosHeight: '', // 記錄上次最終位移
  tracking: false, // 是否在滑動，防止多次操作，影響體驗
  animation: false, // 首圖是否啟用動畫效果，默認(rèn)為否
  opacity: 1, // 記錄首圖透明度
  swipe: false // onTransition判定條件
  }
 }
 },
 methods: {
 touchstart (e) {
  if (this.temporaryData.tracking) {
  return
  }
  // 是否為touch
  if (e.type === 'touchstart') {
  if (e.touches.length > 1) {
   this.temporaryData.tracking = false
   return
  } else {
   // 記錄起始位置
   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
  }
  // 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.tracking = true
  this.temporaryData.animation = false
 },
 touchmove (e) {
  // 記錄滑動位置
  if (this.temporaryData.tracking && !this.temporaryData.animation) {
  if (e.type === 'touchmove') {
   this.basicdata.end.x = e.targetTouches[0].clientX
   this.basicdata.end.y = e.targetTouches[0].clientY
  } else {
   this.basicdata.end.x = e.clientX
   this.basicdata.end.y = e.clientY
  }
  // 計算滑動值
  this.temporaryData.poswidth = this.basicdata.end.x - this.basicdata.start.x
  this.temporaryData.posheight = this.basicdata.end.y - this.basicdata.start.y
  }
 },
 touchend (e) {
  this.temporaryData.tracking = false
  this.temporaryData.animation = true
  // 滑動結(jié)束，觸發(fā)判斷
  // 簡單判斷滑動寬度超出100像素時觸發(fā)滑出
  if (Math.abs(this.temporaryData.poswidth) >= 100) {
  // 最終位移簡單設(shè)定為x軸200像素的偏移
  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
  // 記錄最終滑動距離
  this.temporaryData.lastPosWidth = this.temporaryData.poswidth
  this.temporaryData.lastPosHeight = this.temporaryData.posheight
  // currentPage+1 引發(fā)排序變化
  this.basicdata.currentPage += 1
  // currentPage切換，整體dom進(jìn)行變化，把第一層滑動置零
  this.$nextTick(() => {
   this.temporaryData.poswidth = 0
   this.temporaryData.posheight = 0
   this.temporaryData.opacity = 1
  })
  // 不滿足條件則滑入
  } else {
  this.temporaryData.poswidth = 0
  this.temporaryData.posheight = 0
  this.temporaryData.swipe = false
  }
 },
 onTransitionEnd (index) {
  // dom發(fā)生變化后，正在執(zhí)行的動畫滑動序列已經(jīng)變?yōu)樯弦粚?
  if (this.temporaryData.swipe && index === this.basicdata.currentPage - 1) {
  this.temporaryData.animation = true
  this.temporaryData.lastPosWidth = 0
  this.temporaryData.lastPosHeight = 0
  this.temporaryData.swipe = false
  }
 },
 // 非首頁樣式切換
 transform (index) {
  if (index > this.basicdata.currentPage) {
  let style = {}
  let visible = 3
  let perIndex = index - this.basicdata.currentPage
  // visible可見數(shù)量前滑塊的樣式
  if (index <= this.basicdata.currentPage + visible - 1) {
   style['opacity'] = '1'
   style['transform'] = 'translate3D(0,0,' + -1 * perIndex * 60 + 'px' + ')'
   style['zIndex'] = visible - index + this.basicdata.currentPage
   style['transitionTimingFunction'] = 'ease'
   style['transitionDuration'] = 300 + 'ms'
  } else {
   style['zIndex'] = '-1'
   style['transform'] = 'translate3D(0,0,' + -1 * visible * 60 + 'px' + ')'
  }
  return style
  // 已滑動模塊釋放后
  } else if (index === this.basicdata.currentPage - 1) {
  let style = {}
  // 繼續(xù)執(zhí)行動畫
  style['transform'] = 'translate3D(' + this.temporaryData.lastPosWidth + 'px' + ',' + this.temporaryData.lastPosHeight + 'px' + ',0px)'
  style['opacity'] = '0'
  style['zIndex'] = '-1'
  style['transitionTimingFunction'] = 'ease'
  style['transitionDuration'] = 300 + 'ms'
  return style
  }
 },
 // 首頁樣式切換
 transformIndex (index) {
  // 處理3D效果
  if (index === this.basicdata.currentPage) {
  let style = {}
  style['transform'] = 'translate3D(' + this.temporaryData.poswidth + 'px' + ',' + this.temporaryData.posheight + 'px' + ',0px)'
  style['opacity'] = this.temporaryData.opacity
  style['zIndex'] = 10
  if (this.temporaryData.animation) {
   style['transitionTimingFunction'] = 'ease'
   style['transitionDuration'] = 300 + 'ms'
  }
  return style
  }
 }
 }
}
</script>

ok~ 完成了上面的四步，堆疊組件的基本功能就已經(jīng)實現(xiàn)，快來看看效果吧