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