微信小程序实现卡片层叠滑动效果

代码：

js：

// 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(); } }, })

wxml：

<view> <view> <view bindtouchstart='moveStart' bindtouchend='moveItem'> <block wx:for="{{datas}}"> <li animation="{{item.animation}}" bindtap="choose" data-id="{{item.id}}"> <image src="https://www.jb51.net/{{item.iamge}}"></image> </li> </block> </view> </view> </view>

wxss：

.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; }

效果：

1.左右滑动时，向相应方向移动一个卡片位置；
2.点击某一项时，将点击项位置移动到中间位置；