微信小程序滑动删除功能，没有组件自己撸了个Demo

http://bbs.larkapp.com/thread-13805-1-1.html 没有高度封装，有人愿意封装优化下的可以弄下 效果图   1、wxml  touch-item元素绑定了bindtouchstart、bindtouchmove事件 [HTML]  纯文本查看  复制代码 < view class = "container" > < view class = "touch-item {{item.isTouchMove ? 'touch-move-active' : ''}}" data-index = "{{index}}" bindtouchstart = "touchstart" bindtouchmove = "touchmove" wx:for = "{{items}}" wx:key = "" > < view class = "content" >{{item.content}} view > < view class = "del" catchtap = "del" data-index = "{{index}}" >删除 view > view > view > 2、wxss flex布局、css3动画 [CSS]  纯文本查看  复制代码 .touch-item { font-size : 14px ; display : flex; justify- content : space-between; border-bottom : 1px solid #ccc ; width : 100% ; overflow : hidden } .content { width : 100% ; padding : 10px ; line-height : 22px ; margin-right : 0 ; -webkit-transition: all 0.4 s; transition: all 0.4 s; -webkit-transform: translateX( 90px ); transform: translateX( 90px ); margin-left : -90px } .del { background-color : orangered; width : 90px ; display : flex; flex- direction : column; align-items: center ; justify- content : center ; color : #fff ; -webkit-transform: translateX( 90px ); transform: translateX( 90px ); -webkit-transition: all 0.4 s; transition: all 0.4 s; } .touch-move-active .content, .touch-move-active .del { -webkit-transform: translateX( 0 ); transform: translateX( 0 ); } 3、js  注释很详细 [JavaScript]  纯文本查看  复制代码 var app = getApp() Page({ data: { items: [], startX: 0, //开始坐标 startY: 0 }, onLoad: function () { for ( var i = 0; i < 10; i++) { this .data.items.push({ content: i + " 向左滑动删除哦,向左滑动删除哦,向左滑动删除哦,向左滑动删除哦,向左滑动删除哦" , isTouchMove: false //默认全隐藏删除 }) } this .setData({ items: this .data.items }) }, //手指触摸动作开始 记录起点X坐标 touchstart: function (e) { //开始触摸时 重置所有删除 this .data.items.forEach( function (v, i) { if (v.isTouchMove) //只操作为true的 v.isTouchMove = false ; }) this .setData({ startX: e.changedTouches[0].clientX, startY: e.changedTouches[0].clientY, items: this .data.items }) }, //滑动事件处理 touchmove: function (e) { var that = this , index = e.currentTarget.dataset.index, //当前索引 startX = that.data.startX, //开始X坐标 startY = that.data.startY, //开始Y坐标 touchMoveX = e.changedTouches[0].clientX, //滑动变化坐标 touchMoveY = e.changedTouches[0].clientY, //滑动变化坐标 //获取滑动角度 angle = that.angle({ X: startX, Y: startY }, { X: touchMoveX, Y: touchMoveY }); that.data.items.forEach( function (v, i) { v.isTouchMove = false //滑动超过30度角 return if (Math.abs(angle) > 30) return ; if (i == index) { if (touchMoveX > startX) //右滑 v.isTouchMove = false else //左滑 v.isTouchMove = true } }) //更新数据 that.setData({ items: that.data.items }) }, /** * 计算滑动角度 * @param {Object} start 起点坐标 * @param {Object} end 终点坐标 */ angle: function (start, end) { var _X = end.X - start.X, _Y = end.Y - start.Y //返回角度 /Math.atan()返回数字的反正切值 return 360 * Math.atan(_Y / _X) / (2 * Math.PI); }, //删除事件 del: function (e) { this .data.items.splice(e.currentTarget.dataset.index, 1) this .setData({ items: this .data.items }) } })

本主题由 臭臭打不死 于  7 天前 置顶

微信截图_20170105134336.png (24.63 KB, 下载次数: 0)

微信截图_20170105134352.png (24.63 KB, 下载次数: 0)