微信小程序 侧滑删除（左滑删除）
如图所示，demo是小程序的侧滑删除，这个是我在别人写的例子的基础上修改的。代码如下
js文件代码：
// pages/leftSwiperDel/index.js var initdata = function (that) { var list = that.data.list for (var i = 0; i < list.length; i++) { list[i].txtStyle = "" } that.setData({ list: list }) } Page({ data: { delBtnWidth: 180,//删除按钮宽度单位（rpx） list: [ { txtStyle: "", icon: "/images/qcm.png", txt: "指尖快递" }, { txtStyle: "", icon: "/images/qcm.png", txt: "指尖快递" }, { txtStyle: "", icon: "/images/qcm.png", txt: "指尖快递" }, { txtStyle: "", icon: "/images/qcm.png", txt: "指尖快递" }, { txtStyle: "", icon: "/images/qcm.png", txt: "指尖快递" }, { txtStyle: "", icon: "/images/qcm.png", txt: "指尖快递" }, { txtStyle: "", icon: "/images/qcm.png", txt: "指尖快递" }, { txtStyle: "", icon: "/images/qcm.png", txt: "指尖快递" }, { txtStyle: "", icon: "/images/qcm.png", txt: "指尖快递" }, { txtStyle: "", icon: "/images/qcm.png", txt: "指尖快递" }, { txtStyle: "", icon: "/images/qcm.png", txt: "指尖快递" }, ] }, onLoad: function (options) { // 页面初始化 options为页面跳转所带来的参数 this.initEleWidth(); }, onReady: function () { // 页面渲染完成 }, onShow: function () { // 页面显示 }, onHide: function () { // 页面隐藏 }, onUnload: function () { // 页面关闭 }, touchS: function (e) { if (e.touches.length == 1) { this.setData({ //设置触摸起始点水平方向位置 startX: e.touches[0].clientX }); } }, touchM: function (e) { var that = this initdata(that) if (e.touches.length == 1) { //手指移动时水平方向位置 var moveX = e.touches[0].clientX; //手指起始点位置与移动期间的差值 var disX = this.data.startX - moveX; var delBtnWidth = this.data.delBtnWidth; var txtStyle = ""; if (disX == 0 || disX < 0) {//如果移动距离小于等于0，文本层位置不变 txtStyle = "left:0px"; } else if (disX > 0) {//移动距离大于0，文本层left值等于手指移动距离 txtStyle = "left:-" + disX + "px"; if (disX >= delBtnWidth) { //控制手指移动距离最大值为删除按钮的宽度 txtStyle = "left:-" + delBtnWidth + "px"; } } //获取手指触摸的是哪一项 var index = e.target.dataset.index; var list = this.data.list; list[index].txtStyle = txtStyle; //更新列表的状态 this.setData({ list: list }); } }, touchE: function (e) { if (e.changedTouches.length == 1) { //手指移动结束后水平位置 var endX = e.changedTouches[0].clientX; //触摸开始与结束，手指移动的距离 var disX = this.data.startX - endX; var delBtnWidth = this.data.delBtnWidth; //如果距离小于删除按钮的1/2，不显示删除按钮 var txtStyle = disX > delBtnWidth / 2 ? "left:-" + delBtnWidth + "px" : "left:0px"; //获取手指触摸的是哪一项 var index = e.target.dataset.index; var list = this.data.list; list[index].txtStyle = txtStyle; //更新列表的状态 this.setData({ list: list }); } }, //获取元素自适应后的实际宽度 getEleWidth: function (w) { var real = 0; try { var res = wx.getSystemInfoSync().windowWidth; var scale = (750 / 2) / (w / 2);//以宽度750px设计稿做宽度的自适应 // console.log(scale); real = Math.floor(res / scale); return real; } catch (e) { return false; // Do something when catch error } }, initEleWidth: function () { var delBtnWidth = this.getEleWidth(this.data.delBtnWidth); this.setData({ delBtnWidth: delBtnWidth }); }, //点击删除按钮事件 delItem: function (e) { var that = this wx.showModal({ title: '提示', content: '是否删除？', success: function (res) { if (res.confirm) { //获取列表中要删除项的下标 var index = e.target.dataset.index; var list = that.data.list; //移除列表中下标为index的项 list.splice(index, 1); //更新列表的状态 that.setData({ list: list }); } else { initdata(that) } } }) } })
wxss文件代码：
/* pages/leftSwiperDel/index.wxss */ view{ box-sizing: border-box; } .item-box{ width: 700rpx; margin: 0 auto; padding:40rpx 0; } .items{ width: 100%; } .item{ position: relative; border-top: 2rpx solid #eee; height: 120rpx; line-height: 120rpx; overflow: hidden; } .item:last-child{ border-bottom: 2rpx solid #eee; } .inner{ position: absolute; top:0; } .inner.txt{ background-color: #fff; width: 100%; z-index: 5; padding:0 10rpx; transition: left 0.2s ease-in-out; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; } .inner.del{ background-color: #e64340; width: 180rpx;text-align: center; z-index: 4; right: 0; color: #fff } .item-icon{ width: 64rpx; vertical-align: middle; margin-right: 16rpx } .thumb{ width: 200px; height: 200px; -webkit-overflow-scrolling: touch; overflow: scroll; }
wxml文件代码：