Vue2实现数字滚动翻页效果的示例代码
更新时间:2024年03月19日 08:33:21 作者:fruge
这篇文章主要为大家详细介绍了Vue2如何实现数字滚动翻页效果,文中的示例代码讲解详细,具有一定的借鉴价值,有需要的小伙伴可以参考一下
前言
最近大屏项目中有数值需要数值变化时有一个炸裂的效果,对用户来说明显一点,经过几番查找,自己又重新修改总结,发出下面文,防止下次遇到。
实现这种效果有两种方法:
第一种方法
第一种方法虽然实现了效果,但是数值变化整体都重新滚动了,不太好。
效果
新建文件FlipItem.vue
<template> <div style=" display: inline-flex; justify-content: flex-start; align-items: center; " > <div v-for="(item, index) in numberList" :key="index" style=" display: inline-flex; justify-content: flex-start; align-items: center; padding-bottom: 0.3rem; box-sizing: border-box; " > <span v-if="isNaN(item)">{{ item }}</span> <div class="number" v-else :style="{ color: TextColor }"> <span class="number-item" ref="numberItem" :data-number="item" :data-index="index" >0123456789</span > </div> </div> </div> </template> <script> export default { name: "ScrollNumber", props: { value: { type: [String, Number], default: 0, }, TextColor: { type: String, default: "black", }, }, watch: { value: { handler(newValue, oldValue) { // console.log("🚀 ~ value ~ newVal:", newValue); if (newValue) { this.$nextTick(() => { this.setNumberTransform(); }); } }, deep: true, immediate: true, }, TextColor: { handler(newValue, oldValue) { console.log("🚀 ~ handler ~ newValue:", newValue); this.TextColor = newValue; }, deep: true, immediate: true, }, }, computed: { numberList() { return String(this.value).split(""); }, pageColor() { return { "--TextColor": this.TextColor, }; }, }, data() { return { hasShow: false, // 是否已展示过动画 // TextColor: "red", }; }, mounted() { window.addEventListener("scroll", this.scrollHandle, true); // 监听 监听元素是否进入/移出可视区域 }, methods: { scrollHandle() { const offset = this.$el.getBoundingClientRect(); const offsetTop = offset.top; const offsetBottom = offset.bottom; // 进入可视区域 if (offsetTop <= window.innerHeight && offsetBottom >= 0) { this.setNumberTransform(); this.hasShow = true; window.removeEventListener("scroll", this.scrollHandle, true); } else { // 移出可视区域 if (this.hasShow) { window.removeEventListener("scroll", this.scrollHandle, true); } } }, // 设置每一位数字的偏移 setNumberTransform() { let numberItems = this.$refs.numberItem; let obj = {}; Array.from(numberItems).forEach((c) => { let key = c.dataset.index; let value = c.dataset.number; let init = 0; obj[key] = setInterval(() => { if (init < value * 10) { init += 1; c.style.transform = `translateY(-${init}%)`; } else { clearInterval(obj[key]); obj[key] = null; } }, 8); }); }, }, }; </script> <style scoped lang="scss"> .number { width: 30px; height: 30px; font-size: 25px; font-weight: 800; color: var(--TextColor); text-align: center; overflow: hidden; span { text-align: center; writing-mode: vertical-rl; text-orientation: upright; transform: translateY(0%); } } </style>
父组件引用
<template> <div class="father"> <FlipItemVue :value="num.toString()" :TextColor="TextColor"></FlipItemVue> <button @click="NumChangeFn">点击变更数字</button> </div> </template> <script> import FlipItemVue from "./FlipItem.vue"; export default { components: { FlipItemVue, }, data() { return { num: 123456, TextColor: "red", }; }, methods: { NumChangeFn() { this.num = 9999999; }, }, }; </script> <style lang="scss" scoped> </style>
第二种方法
第二种方法效果更好一点,数字滚动更丝滑自然只有变化的数值滚动。这里我就没有封装也就copy了一个demo过来了,问题:1、我封装了首次接受数值时只有第一个数字滚动,2、页面首次渲染如果是三个数字,那么宽度就固定了。这时候传过来新值是四个字,可能就会出现内容超出。(可能我个人问题)
效果
新建文件Index.vue
<template> <div class="days-box"> <div class="operating-title">安全运行天数</div> <div class="box-item"> <li :class="{ 'number-item': !isNaN(item), 'mark-item': isNaN(item), }" v-for="(item, index) in runningDays" :key="index" > <span v-if="!isNaN(item)"> <i ref="numberItem">0123456789</i> </span> <span class="comma" v-else>{{ item }}</span> </li> </div> <button @click="toRunningNum(399)">点击</button> </div> </template> <script> export default { data() { return { runningDays: ["0", "0", "0", "0", "0", "0", "0", "0"], }; }, mounted() { // 获取当前日期 var today = new Date(); // 设置起始日期 var startDate = new Date("2023-04-24"); // 计算天数差 var timeDiff = Math.abs(today.getTime() - startDate.getTime()); var diffDays = Math.ceil(timeDiff / (1000 * 3600 * 24)); this.$nextTick(() => { this.toRunningNum(diffDays); // 这里输入数字即可调用 this.setNumberTransform(); }); }, methods: { // 设置文字滚动 setNumberTransform() { const numberItems = this.$refs.numberItem; // 拿到数字的ref,计算元素数量 console.log("🚀 ~ setNumberTransform ~ numberItems:", numberItems); const numberArr = this.runningDays.filter((item) => !isNaN(item)); // 结合CSS 对数字字符进行滚动,显示订单数量 for (let index = 0; index < numberItems.length; index++) { const elem = numberItems[index]; elem.style.transform = `translate(-50%, -${numberArr[index] * 10}%)`; } }, // 处理数字 toRunningNum(num) { num = num.toString(); this.runningDays = num.split(""); // 将其便变成数据,渲染至滚动数组 this.setNumberTransform(); }, }, }; </script> <style lang="scss" scoped> .days-box { display: flex; flex-direction: column; justify-content: center; align-items: center; } /*滚动数字设置*/ .operating-title { color: black; font-size: 16px; margin-bottom: 10px; } .box-item { position: relative; height: 80px; font-size: 54px; line-height: 41px; text-align: center; list-style: none; // color: #2d7cff; color: #fff; writing-mode: vertical-lr; text-orientation: upright; /*文字禁止编辑*/ -moz-user-select: none; /*火狐*/ -webkit-user-select: none; /*webkit浏览器*/ -ms-user-select: none; /*IE10*/ -khtml-user-select: none; /*早期浏览器*/ user-select: none; /* overflow: hidden; */ } /* 默认逗号设置 */ .mark-item { width: 10px; height: 100px; margin-right: 5px; line-height: 10px; font-size: 48px; position: relative; & > span { position: absolute; width: 100%; bottom: 0; writing-mode: vertical-rl; text-orientation: upright; } } /*滚动数字设置*/ .number-item { width: 41px; height: 75px; // background: #ccc; list-style: none; margin-right: 5px; // background: rgb(7, 50, 207); border-radius: 4px; // border: 1px solid rgba(7, 50, 207, 1); color: black; & > span { position: relative; display: inline-block; margin-right: 10px; width: 100%; height: 100%; writing-mode: vertical-rl; text-orientation: upright; overflow: hidden; & > i { font-style: normal; position: absolute; top: 11px; left: 50%; transform: translate(-50%, 0); transition: transform 1s ease-in-out; letter-spacing: 10px; } } } </style>
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