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這篇文章將為大家詳細講解有關怎么在小程序中實現一個層疊卡片滑動效果,文章內容質量較高,因此小編分享給大家做個參考,希望大家閱讀完這篇文章后對相關知識有一定的了解。
wxml
<!-- 輪播wxml代碼 --> <view class="teachers_banner"> <view class="lunbo_center clearfix teachers_b"> <view class="slide" id="slide" bindtouchstart='moveStart' bindtouchend='moveItem'> <ul> <block wx:for="{{datas}}" wx:key> <li animation="{{item.animation}}" bindtap="choose" data-id="{{item.id}}"> <image src="{{item.iamge}}" /> </li> </block> </ul> </view> </view> </view>
wxss
/*輪播圖片*/ .lunbo_center { display: flex; flex-direction: column; align-items: center; justify-content: space-between; padding: 50rpx 0; box-sizing: border-box; } .teachers_b { position: relative; } #slide { margin: 0 auto; width: 100%; height: 160px; position: relative; } #slide li { position: absolute; width: 600rpx; height: 300rpx; display: -webkit-box; display: -webkit-flex; display: flex; align-items: flex-start; -webkit-box-align: flex-start; -webkit-align-items: flex-start; background: #fff; overflow: hidden; box-shadow: 0 0 20px #1d374d; } #slide li image { width: 100%; height: 100%; } .slide_left { width: 240px; } .slide_right { padding: 40px; -webkit-box-flex: 1; -webkit-flex: 1; flex: 1; min-width: 0; } .slide_right h4 { font: 400 30px/18px "Microsoft Yahei"; color: #222; } .slide_right h4 span { display: inline-block; margin-left: 10px; font: 400 14px/36px "Microsoft Yahei"; color: #555; } .slide_right p { padding: 20px 0 30px; color: #555; font: 400 14px/24px "Microsoft Yahei"; border-bottom: 1px solid #dbdbdb; } .slide_right dl { padding-top: 30px; } .slide_right dd { /* float: left; */ width: 33.3%; color: #777; font: 400 12px/24px "Microsoft Yahei"; } .slide_right dd h4 { color: #ff9000; margin-bottom: 20px; } .arrow { display: none; } .arrow .prev, .arrow .next { position: absolute; width: 64px; top: 38%; z-index: 9; font: 700 96px 'simsun'; opacity: 0.3; color: #fff; cursor: pointer; } .arrow .prev { left: -220px; } .arrow .next { right: -220px; } .arrow .prev:hover, .arrow .next:hover { color: #00a0e9; opacity: 0.7; }
js
// js代碼 Page({ /** * 頁面的初始數據 */ data: { startX: 0, endX: 0, iCenter: 3, datas: [{ id: 1, zIndex: 2, opacity: 0.2, left: 10, iamge: "../../icon/lunbo2.jpg", animation: null }, { id: 2, zIndex: 4, opacity: 0.4, left: 20, iamge: "../../icon/lunbo3.jpg", animation: null }, { id: 3, zIndex: 6, opacity: 0.6, left: 30, iamge: "../../icon/lunbo4.jpg", animation: null }, { id: 4, zIndex: 8, opacity: 1, left: 40, iamge: "../../icon/lunbo1.jpg", animation: null }, { id: 5, zIndex: 6, opacity: 0.6, left: 50, iamge: "../../icon/lunbo2.jpg", animation: null }, { id: 6, zIndex: 4, opacity: 0.4, left: 60, iamge: "../../icon/lunbo3.jpg", animation: null } , { id: 7, zIndex: 2, opacity: 0.2, left: 70, iamge: "../../icon/lunbo1.jpg", animation: null } ], order: [] }, /** * 生命周期函數--監聽頁面加載 */ onLoad: function (options) { this.__set__(); this.move(); }, move: function () { var datas = this.data.datas; /*圖片分布*/ for (var i = 0; i < datas.length; i++) { var data = datas[i]; var animation = wx.createAnimation({ duration: 100 }); animation.translateX(data.left).step(); this.setData({ ["datas[" + i + "].animation"]: animation.export(), ["datas[" + i + "].zIndex"]: data.zIndex, ["datas[" + i + "].opacity"]: data.opacity, }) } }, /**左箭頭 */ left: function () { // var last = this.data.datas.pop(); //獲取數組的最后一個 this.data.datas.unshift(last);//放到數組的第一個 var orderFirst = this.data.order.shift(); this.data.order.push(orderFirst); this.move(); }, /** */ right: function () { var first = this.data.datas.shift(); //獲取數組的第一個 this.data.datas.push(first);//放到數組的最后一個位置 var orderLast = this.data.order.pop(); this.data.order.unshift(orderLast); this.move(); }, /**點擊某項 */ 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()); //獲取第一個放到最后一個 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()); //獲取最后一個放到第一個 this.data.order.push(this.data.order.shift()); // this.left(); } } this.move(); }, /**新的排列復制到新的數組中 */ __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 }) } }, //手指觸發開始移動 moveStart: function (e) { console.log(e); var startX = e.changedTouches[0].pageX; this.setData({ startX: startX }); }, //手指觸摸后移動完成觸發事件 moveItem: function (e) { console.log(e); var that = this; var endX = e.changedTouches[0].pageX; this.setData({ endX: endX }); //計算手指觸摸偏移劇距離 var moveX = this.data.startX - this.data.endX; //向左移動 if (moveX > 20) { this.left(); } if (moveX < -20) { this.right(); } }, })
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