嗨,提及探探想必各位程序汪都不陌生(毕竟妹子不少),能在上面丝滑的翻牌子,探探的的堆叠滑动组件起到了关键的做用,下面就来看看如何用vue写一个探探的堆叠组件 ?css
简单使用下探探会发现,堆叠滑动的功能很简单,用一张图归纳就是:
简单概括下里面包含的基本功能点:html
体验优化前端
有了概括好的功能点,咱们实现组件的思路会更清晰vue
堆叠图片效果在网上有大量的实例,实现的方法大同小异,主要经过在父层设定perspective及perspective-origin,来实现子层的透视,子层设定好translate3d Z轴数值便可模拟出堆叠效果,具体代码以下git
// 图片堆叠dom <!--opacity: 0 隐藏咱们不想看到的stack-item层级--> <!--z-index: -1 调整stack-item层级"--> <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; //子元素视距 perspective-origin: 50% 150%; //子元素透视位置 -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>
上面只是一组静态代码,咱们但愿获得的是vue组件,因此须要先创建一个组件模板stack.vue,在模板中咱们可使用v-for,遍历出stack节点,使用:style 来修改各个item的style,代码以下github
<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数据包含基础的图片数据 pages: { type: Array, default: [] } }, data () { return { // basicdata数据包含组件基本数据 basicdata: { currentPage: 0 // 默认首图的序列 }, // temporaryData数据包含组件临时数据 temporaryData: { opacity: 1, // 记录opacity zIndex: 10, // 记录zIndex visible: 3 // 记录默认显示堆叠数visible } } }, methods: { // 遍历样式 transform (index) { if (index >= this.basicdata.currentPage) { let style = {} let visible = this.temporaryData.visible let perIndex = index - this.basicdata.currentPage // visible可见数量前滑块的样式 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>
最基本的dom结构已经构建完毕,下一步是让首张图片“动”起来web
图片滑动效果,在不少场景中都有出现,其原理无非是监听touchs事件,获得位移,再经过translate3D改变目标位移,所以咱们要实现的步骤以下数组
在vue框架中,不建议直接操做节点,而是经过指令v-on对元素进行绑定,所以咱们将绑定都写在v-for遍历里,经过index进行判断其是不是首图,再使用:style修改首页的样式,具体代码以下:框架
<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数据包含基础的图片数据 pages: { type: Array, default: [] } }, data () { return { // basicdata数据包含组件基本数据 basicdata: { start: {}, // 记录起始位置 end: {}, // 记录终点位置 currentPage: 0 // 默认首图的序列 }, // temporaryData数据包含组件临时数据 temporaryData: { poswidth: '', // 记录位移 posheight: '', // 记录位移 tracking: false // 是否在滑动,防止屡次操做,影响体验 } } }, 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 } // pc操做 } 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) { // 记录滑动位置 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 } // 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 } }, touchend (e) { this.temporaryData.tracking = false // 滑动结束,触发判断 }, // 非首页样式切换 transform (index) { if (index > this.basicdata.currentPage) { let style = {} let visible = 3 let perIndex = index - this.basicdata.currentPage // visible可见数量前滑块的样式 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 } }, // 首页样式切换 transformIndex (index) { // 处理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>
条件的触发判断是在touchend/mouseup后进行,在这里咱们先用简单的条件进行断定,同时给予首图弹出及回弹的效果,代码以下dom
<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数据包含基础的图片数据 pages: { type: Array, default: [] } }, data () { return { // basicdata数据包含组件基本数据 basicdata: { start: {}, // 记录起始位置 end: {}, // 记录终点位置 currentPage: 0 // 默认首图的序列 }, // temporaryData数据包含组件临时数据 temporaryData: { poswidth: '', // 记录位移 posheight: '', // 记录位移 tracking: false, // 是否在滑动,防止屡次操做,影响体验 animation: false, // 首图是否启用动画效果,默认为否 opacity: 1 // 记录首图透明度 } } }, 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 } // pc操做 } 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) { // 记录滑动位置 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 } // 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 } }, touchend (e) { this.temporaryData.tracking = false this.temporaryData.animation = true // 滑动结束,触发判断 // 简单判断滑动宽度超出100像素时触发滑出 if (Math.abs(this.temporaryData.poswidth) >= 100) { // 最终位移简单设定为x轴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 // 不知足条件则滑入 } else { this.temporaryData.poswidth = 0 this.temporaryData.posheight = 0 } }, // 非首页样式切换 transform (index) { if (index > this.basicdata.currentPage) { let style = {} let visible = 3 let perIndex = index - this.basicdata.currentPage // visible可见数量前滑块的样式 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 } }, // 首页样式切换 transformIndex (index) { // 处理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>
从新堆叠是组件最后一个功能,同时也是最重要和复杂的功能。在咱们的代码里,stack-item的排序依赖绑定:style的transformIndex和transform函数,函数里断定的条件是currentPage,那是否是改变currentPage,让其+1,便可完成从新堆叠呢?
答案没有那么简单,由于咱们滑出是动画效果,会进行300ms的时间,而currentPage变化引发的重排,会当即变化,打断动画的进行。所以咱们须要先修改transform函数的排序条件,后改变currentPage。
#### 具体实现
代码以下:
<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数据包含基础的图片数据 pages: { type: Array, default: [] } }, data () { return { // basicdata数据包含组件基本数据 basicdata: { start: {}, // 记录起始位置 end: {}, // 记录终点位置 currentPage: 0 // 默认首图的序列 }, // temporaryData数据包含组件临时数据 temporaryData: { poswidth: '', // 记录位移 posheight: '', // 记录位移 lastPosWidth: '', // 记录上次最终位移 lastPosHeight: '', // 记录上次最终位移 tracking: false, // 是否在滑动,防止屡次操做,影响体验 animation: false, // 首图是否启用动画效果,默认为否 opacity: 1, // 记录首图透明度 swipe: false // onTransition断定条件 } } }, 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 } // pc操做 } 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) { // 记录滑动位置 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 } // 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 } }, touchend (e) { this.temporaryData.tracking = false this.temporaryData.animation = true // 滑动结束,触发判断 // 简单判断滑动宽度超出100像素时触发滑出 if (Math.abs(this.temporaryData.poswidth) >= 100) { // 最终位移简单设定为x轴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 // 记录最终滑动距离 this.temporaryData.lastPosWidth = this.temporaryData.poswidth this.temporaryData.lastPosHeight = this.temporaryData.posheight // currentPage+1 引起排序变化 this.basicdata.currentPage += 1 // currentPage切换,总体dom进行变化,把第一层滑动置零 this.$nextTick(() => { this.temporaryData.poswidth = 0 this.temporaryData.posheight = 0 this.temporaryData.opacity = 1 }) // 不知足条件则滑入 } else { this.temporaryData.poswidth = 0 this.temporaryData.posheight = 0 this.temporaryData.swipe = false } }, onTransitionEnd (index) { // dom发生变化后,正在执行的动画滑动序列已经变为上一层 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 } }, // 非首页样式切换 transform (index) { if (index > this.basicdata.currentPage) { let style = {} let visible = 3 let perIndex = index - this.basicdata.currentPage // visible可见数量前滑块的样式 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 // 已滑动模块释放后 } else if (index === this.basicdata.currentPage - 1) { let style = {} // 继续执行动画 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 } }, // 首页样式切换 transformIndex (index) { // 处理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,堆叠组件的基本功能就已经实现,快来看看效果吧
堆叠滑动效果已经出来了,可是探探在体验上,还增长了触碰角度偏移,以及断定滑出面积比例
角度偏移的原理,是在用户每次进行touch时,记录用户触碰位置,计算出最大的偏移角度,在滑动出现位移时,线性增长角度以致最大的偏移角度。
使用在stack中具体要作的是:
断定滑出面积比例,主要经过偏移量计算出偏移面积,从而获得面积比例,完成判断
完整的代码和demo能够在github上查看源码,这里就不贴出来了
谢谢你们看完这篇文章,喜欢能够在github上给个⭐️ ,最后祝你们在探探上都能找到前女朋友?
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