微信小程序实现卡片层叠滑动效果

// index/gun/jsSwiper2/jsSwiper2.js
Page({

 /**
 * 页面的初始数据
 */
 data: {
 startX: 0,
 endX: 0,
 iCenter: 3,
 datas: [{
  id: 1,
  zIndex: 2,
  opacity: 0.2,
  left: 40,
  iamge: "../../images/1.jpg",
  animation: null
 },
 {
  id: 2,
  zIndex: 4,
  opacity: 0.4,
  left: 80,
  iamge: "../../images/2.jpg",
  animation: null
 },
 {
  id: 3,
  zIndex: 6,
  opacity: 0.6,
  left: 120,
  iamge: "../../images/3.jpg",
  animation: null
 },
 {
  id: 4,
  zIndex: 8,
  opacity: 1,
  left: 160,
  iamge: "../../images/4.jpg",
  animation: null
 },
 {
  id: 5,
  zIndex: 6,
  opacity: 0.6,
  left: 200,
  iamge: "../../images/5.jpg",
  animation: null
 },
 {
  id: 6,
  zIndex: 4,
  opacity: 0.4,
  left: 240,
  iamge: "../../images/6.jpg",
  animation: null
 },
 {
  id: 7,
  zIndex: 2,
  opacity: 0.2,
  left: 280,
  iamge: "../../images/7.jpg",
  animation: null
 },
 ],
 order: []
 },

 /**
 * 生命周期函数--监听页面加载
 */
 onLoad: function (options) {
 this.__set__();
 this.move();
 },

 /**
 * 生命周期函数--监听页面初次渲染完成
 */
 onReady: function () {

 },

 /**
 * 生命周期函数--监听页面显示
 */
 onShow: function () {

 },

 /**
 * 生命周期函数--监听页面隐藏
 */
 onHide: function () {

 },

 /**
 * 生命周期函数--监听页面卸载
 */
 onUnload: function () {

 },

 /**
 * 页面相关事件处理函数--监听用户下拉动作
 */
 onPullDownRefresh: function () {

 },

 /**
 * 页面上拉触底事件的处理函数
 */
 onReachBottom: function () {

 },

 /**
 * 用户点击右上角分享
 */
 onShareAppMessage: function () {

 },
 move: function () {
 var datas = this.data.datas;
 /*图片分布*/
 for (var i = 0; i < datas.length; i++) {
  var data = datas[i];
  var animation = wx.createAnimation({
  duration: 200
  });
  animation.translateX(data.left).step();
  this.setData({
  ["datas[" + i + "].animation"]: animation.export(),
  ["datas[" + i + "].zIndex"]: data.zIndex,
  ["datas[" + i + "].opacity"]: data.opacity,
  })
 }
 },
 /**左箭头 */
 left: function () {
 //
 var last = this.data.datas.pop(); //获取数组的最后一个
 this.data.datas.unshift(last);//放到数组的第一个
 var orderFirst = this.data.order.shift();
 this.data.order.push(orderFirst);
 this.move();
 },
 /** */
 right: function () {
 var first = this.data.datas.shift(); //获取数组的第一个
 this.data.datas.push(first);//放到数组的最后一个位置
 var orderLast = this.data.order.pop();
 this.data.order.unshift(orderLast);
 this.move();
 },
 /**点击某项 */
 choose: function (e) {
 var that = this;
 var id = e.currentTarget.dataset.id;
 var order = that.data.order;
 var index = 0;
 for (var i = 0; i < order.length; i++) {
  if (id == order[i]) {
  index = i;
  break;
  }
 }
 if (index < that.data.iCenter) {
  for (var i = 0; i < that.data.iCenter - index; i++) {
  this.data.datas.push(this.data.datas.shift()); //获取第一个放到最后一个
  this.data.order.unshift(this.data.order.pop());
  // this.right() 
  }
 } else if (index > that.data.iCenter) {
  for (var i = 0; i < index - that.data.iCenter; i++) {
  this.data.datas.unshift(this.data.datas.pop()); //获取最后一个放到第一个
  this.data.order.push(this.data.order.shift());
  // this.left();
  }
 }
 this.move();
 },
 /**新的排列复制到新的数组中 */
 __set__: function () {
 var that = this;
 var order = that.data.order;
 var datas = that.data.datas;
 for (var i = 0; i < datas.length; i++) {
  that.setData({
  ["order[" + i + "]"]: datas[i].id
  })
 }
 },
 //手指触发开始移动
 moveStart: function (e) {
 console.log(e);
 var startX = e.changedTouches[0].pageX;
 this.setData({
  startX: startX
 });
 },
 //手指触摸后移动完成触发事件
 moveItem: function (e) {
 console.log(e);
 var that = this;
 var endX = e.changedTouches[0].pageX;
 this.setData({
  endX: endX
 });
 //计算手指触摸偏移剧距离
 var moveX = this.data.startX - this.data.endX;
 //向左移动
 if (moveX > 20) {
  this.left();
 }
 if (moveX < -20) {
  this.right();
 }
 },
})

.teachers_banner {
 width: 100%;
 height: 650px;
 background-size: cover;
 position: relative;
 overflow: hidden;
}

.teachers_b {
 position: relative;
 margin-top: 80px;
}

#slide {
 margin: 0 auto;
 width: 100%;
 height: 350px;
 position: relative;
}

image {
 width: 400rpx;
 height: 550rpx;
}

#slide li {
 position: absolute;
 width: 400rpx;
 display: -webkit-box;
 display: -webkit-flex;
 display: flex;
 align-items: flex-start;
 -webkit-box-align: flex-start;
 -webkit-align-items: flex-start;
 overflow: hidden;
 box-shadow: 0 0 20px #1d374d;
}

#slide li img {
 width: 100%;
 height: 100%;
}

.slide_right {
 padding: 40px;
 -webkit-box-flex: 1;
 -webkit-flex: 1;
 flex: 1;
 min-width: 0;
}

.slide_right dl {
 padding-top: 10px;
}

.arrow .prev, .arrow .next {
 position: absolute;
 width: 50px;
 top: 38%;
 z-index: 9;
 font: 700 96px 'simsun';
 opacity: 0.3;
 color: #fff;
 cursor: pointer;
}