vue列表无缝循环滚动
iatkotworld 人气:0功能介绍:
在PC端网页,包括大数据、官网、后台管理平台开发中,可能会用到这种列表循环滚动的展示。
大致需求:
1、列表可以使用数组循环遍历;
2、每隔几秒中列表数据向上滚动一定距离,展示下一条数据;
3、滚动到最后一条数据时重新显示第一条开始的数据(类似走马灯、banner图的循环效果);
整体思路:
1、使用两个定时器嵌套实现;
2、需要两个相同容器存放同样内容,实现无缝衔接效果;
效果展示:
完整代码:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <script src="https://unpkg.com/vue@2.6.14/dist/vue.min.js"></script> <style> /* 滚动表格最外层 */ .tableoOut { margin: 100px auto; width: 500px; height: 400px; background: pink; overflow: hidden; display: flex; align-items: center; justify-content: center; flex-direction: column; } .tableBox { width: 100%; background: #000; overflow: hidden } .tableTit { background: #000; width: 100%; height: 40px; color: #858A84; text-align: center; display: flex; justify-content: center; align-items: center; } .tableInner { height: auto; } .box { width: 100%; height: 50px; display: flex; justify-content: center; align-items: center; color: #fff; } .box .time { color: #858A84; } .tableoOut .addr, .tableoOut .time, .tableoOut .name { box-sizing: border-box; padding: 0 5px;text-align: center; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; } .tableoOut .addr { width: calc(100% - 200px); flex-shrink: 0; } .tableoOut .name, .tableoOut .time { width: 100px; flex-shrink: 0; } </style> </head> <body> <div id="app"> <div class="tableoOut" ref="tableoOut"> <div class="tableTit"> <div class="name">姓名</div> <div class="addr">地址</div> <div class="time">入驻时间</div> </div> <div class="tableBox" ref="tableBox" :style="{height: tableHei}"> <div class="tableInner" ref="tableInner"> <div class="box" v-for="item in 7" :key="item"> <div class="name">{{item}}</div> <div class="addr">山东省山东省山东省山东省山东省山东省山东省山东省 山东省山东省山东省山东省山东省</div> <div class="time">2022-05-26</div> </div> </div> <div class="tableInner" v-if="size < 7"> <div class="box" v-for="item in 7" :key="item"> <div class="name">{{item}}</div> <div class="addr">山东省山东省山东省山东省山东省山东省山东省山东省 山东省山东省山东省山东省山东省</div> <div class="time">2022-05-26</div> </div> </div> </div> </div> </div> </body> <script> new Vue({ el: '#app', data: { tableHei: 'auto', timer: null, size: 0 }, mounted() { this.getTable(); }, methods: { getTable() { const outHei = this.$refs.tableoOut.clientHeight - 60; this.size = Math.floor(outHei / 50); this.tableHei = this.size * 50 + 'px'; this.scrolls(); }, stepScroll() { const step = 50; let num = 0; const tableBox = this.$refs.tableBox; const stepTime = setInterval(function () { num += 2; if (num > step) { num = 0; clearInterval(stepTime); } else { tableBox.scrollTop += 2; } }, 20); }, scrolls() { const that = this; const tableBox = this.$refs.tableBox; const tableInner = this.$refs.tableInner; clearInterval(this.timer); this.timer = setInterval(function () { if(tableBox.scrollTop === tableInner.scrollHeight) { tableBox.scrollTop = 0; } that.stepScroll(); }, 2000); }, } }) </script> </html>
setInterval踩坑:
发现这种方法实现的定时轮播,有一阵没访问页面,会出现卡停的情况,采用下面的解决方法:
<script> new Vue({ el: '#app', data: { tableHei: 'auto', timer: null, size: 0, stopSign: true, // 判断定时器是否停止标识 stepTime: null, // 改为全局定时器 }, mounted() { const that = this; // 增加浏览器激活状态判断。非激活状态为onblur window.onfocus = function(e) { const tableBox = that.$refs.tableBox; const sT = tableBox.scrollTop; console.log("激活状态!") if (!that.stopSign) { tableBox.scrollTop = Math.round(sT / 50) * 50; clearInterval(that.stepTime); } } this.getTable(); }, methods: { getTable() { const outHei = this.$refs.tableoOut.clientHeight - 60; this.size = Math.floor(outHei / 50); this.tableHei = this.size * 50 + 'px'; this.scrolls(); }, stepScroll() { const that = this; const step = 50; let num = 0; const tableBox = this.$refs.tableBox; // 改为全局定时器,且在调用前先进行清空 clearInterval(this.stepTime); this.stepTime = setInterval(function () { that.stopSign = false; num += 2; if (num > step) { num = 0; clearInterval(that.stepTime); that.stopSign = true; } else { tableBox.scrollTop += 2; } }, 1000 / 60); }, scrolls() { const that = this; const tableBox = this.$refs.tableBox; const tableInner = this.$refs.tableInner; clearInterval(this.timer); this.timer = setInterval(function () { // 修改定时器结束判断条件 if(tableBox.scrollTop >= tableInner.scrollHeight) { tableBox.scrollTop = 0; } that.stepScroll(); }, 2000); }, } }) </script>
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