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:
- <view class="item-box">
- <view class="items">
- <view wx:for="{{list}}" wx:key="{{index}}" class="item">
- <view bindtouchstart="touchS" bindtouchmove="touchM" bindtouchend="touchE" data-index="{{index}}" style="{{item.txtStyle}}" class="inner txt">
- <image class="item-icon" mode="widthFix" src="{{item.icon}}"></image>{{index}}{{item.txt}}</view>
- <view data-index="{{index}}" bindtap = "delItem" class="inner del">删除</view>
- </view>
- </view>
- </view>