slider组件与swiper组件不同,slider滑动时并不翻页,实现的是左滑时,显示右侧内容的功能
1、主要思路
思路和swiper组件类似,主要的也就是对三个触摸事件的处理:touchstart、touchmove、touchend
在touchstart事件处理程序中记录一些初始值,比如原始坐标,偏移距离;在touchmove事件处理程序中计算实时滑动的距离,让元素随之一起偏移,与swiper不同的是,slider在左滑之前,不能右滑,以及滑动时,右侧元素的宽度要同步变化;在touchend事件处理程序中计算最终的滑动距离,左滑且大于阙值则滑动固定值,右滑或小于阙值则回到起始位置,右侧元素的宽度要同步变化。
slider组件可以接收三个参数:
rightWidth: 右侧滑出宽度的百分比
isClickBack: 点击是否收起右侧
isMainSlide: 左侧是否滑动(false则覆盖左侧)
2、代码实现
页面结构:有两个slot来展示左右两边的内容
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< template > < div class = "ths_slider" ref = "slider" > < div class = "main" @ touchstart = "touchstart" @ touchmove = "touchmove" @ touchend = "touchend" > < slot name = "main" ></ slot > </ div > < div class = "right" ref = "right" > < slot name = "right" ></ slot > </ div > </ div > </ template > |
初始设置:记录页面宽度,根据参数isMainSlide来判断滑动的元素
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mounted () { this .pageWidth = document.documentElement.clientWidth this .sliderEle = this .isMainSlide ? this .$refs.slider : this .$refs.right } |
事件处理:
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touchstart (e) { this .originalPos = e.touches[0].pageX const transform = this .sliderEle.style.transform this .originalLeft = Number(transform ? transform.split( '(' )[1].split( 'px' )[0] : 0) this .oriRigWidth = this .originalLeft < 0 ? Number( this .$refs.right.style.width.split( 'px' )[0]) : 0 }, touchmove (e) { let moveDistance = e.touches[0].pageX - this .originalPos // >0 右滑,<0 左滑 if (moveDistance > 0 && this .originalLeft >= 0) { // 未向左边滑动时,不能右滑 return false } this .doSlide(moveDistance / 2 + this .originalLeft) // 除以2来控制滑动速度 }, touchend (e) { const moveDistance = e.changedTouches[0].pageX - this .originalPos // >0 右滑,<0 左滑 let distance if (! this .isClickBack && moveDistance === 0) { // 点击时不收起右侧 return false } if ((-moveDistance) > 50) { // 向左滑动超过阙值时,右侧滑出固定距离 distance = this .pageWidth * this .rightWidth / 100 } else { // 向左滑动未超过阙值,或向右滑动时,回原位 distance = 0 } this .doSlide(-distance, true ) }, /** * 滑动方法---位置变化 && 右侧宽度变化 * @param {Number} distance 滑动距离 * @param {Boolean} animate 滑动是否有动画效果 */ doSlide (distance, animate = false ) { this .sliderEle.style.transform = `translateX(${distance}px)` this .$refs.right.style.width = -distance + 'px' if ( this .isMainSlide) { this .sliderEle.style.transition = animate ? 'transform .5s' : 'initial' this .$refs.right.style.transition = animate ? 'width .5s' : 'initial' } else { this .sliderEle.style.transition = animate ? 'transform .5s, width .5s' : 'initial' } } |
3、组件使用
父组件可以调用slider组件的doSlide()方法来实现点击唤出右侧元素
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< t-slider class = "slider" > < template slot = "main" >左侧滑动</ template > < template slot = "right" > < div class = "edit" >编辑</ div > < div class = "delete" >删除</ div > </ template > </ t-slider > < t-slider class = "slider" :rightWidth = "rightWidth" :isMainSlide = "false" > < template slot = "main" > < div >覆盖左侧</ div > < div class = "btn" @ click = "showRight" >点击唤出</ div > </ template > < template slot = "right" > < div class = "newContent" >newContent</ div > </ template > </ t-slider > < t-slider class = "slider" :isClickBack = "false" > < template slot = "main" >点击不收起</ template > < template slot = "right" > < div class = "edit" >编辑</ div > < div class = "delete" >删除</ div > </ template > </ t-slider > |
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components: {TSlider}, data () { return { pageWidth: null , rightWidth: 80 } }, mounted () { this .pageWidth = document.documentElement.clientWidth }, methods: { showRight () { this .$refs.mainSlider.doSlide(- this .pageWidth * this .rightWidth / 100, true ) } } |
4、效果展示
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/latency_cheng/article/details/82983000