這次給大家?guī)韛ue實現(xiàn)滑動堆疊組件，vue實現(xiàn)滑動堆疊組件的注意事項有哪些，下面就是實戰(zhàn)案例，一起來看一下。
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
簡單歸納下里面包含的基本功能點:
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，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，主要通過在父層設定perspective 及perspective-origin ，來實現(xiàn)子層的透視，子層設定好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，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>關鍵點
: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改變目標位移，因此我們要實現(xiàn)的步驟如下
對stack進行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，而是通過指令v-on對元素進行綁定，因此我們將綁定都寫在v-for遍歷里，通過index進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: {}, // 記錄終點位置
currentPage: 0 // 默認首圖的序列
},
// 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后進行，在這里我們先用簡單的條件進行判定，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: {}, // 記錄終點位置
currentPage: 0 // 默認首圖的序列
},
// 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+
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: {}, // 記錄終點位置
currentPage: 0 // 默認首圖的序列
},
// 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
相信看了本文案例你已經(jīng)掌握了方法，更多精彩請關注Gxl網(wǎng)其它相關文章！
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