uniapp 开发之仿抖音，上下滑动切换视频、点击小爱心效果-编程知识

效果图：

功能描述：

上下滑动视频，双击暂停，然后第一个视频再往上滑显示”已经滑到顶了“

开始代码：

首先视频接口使用的公开的视频测试接口

开放API-2.0 官网展示 Swagger UI 接口文档

一开始编写如下：

<template><view><!--swiper实现整屏划动播放视频--><swiper circular vertical duration="200" @transition="transition" @change="changed":style="{height: screenHeight-navBarHeight +'px'}"><block v-for="(item,index) in displaySwiperList" :key="index"><swiper-item><!-- v-if="index==changeIndex" 只渲染当前页的视频，能够有效解决数组不断追加后引起黑屏的问题 --><video v-if="index==changeIndex" :src="item.src" autoplay="true" controls="true"custom-cache="false" loop="false" enable-play-gesture="true" enable-progress-gesture="true"show-center-play-btn="true"></video><!-- 文本标题 --><view class="video-text"><view class="tips"> {{item.title}} </view></view></swiper-item></block></swiper></view>
</template><script>export default {data() {return {screenHeight: 0,statusBarHeight: 0,navBarHeight: 0,originList: [], // 源数据displaySwiperList: [], // swiper需要的数据displayIndex: 0, // 用于显示swiper的真正的下标数值只有：0，1，2。originIndex: 0, // 记录源数据的下标changeIndex: 0, //控制video是否渲染page: 0, // 视频分页num: 0,flag: true}},onLoad() {/* 获取系统信息 */wx.getSystemInfo({success: (res) => {// 获取屏幕高度this.screenHeight = res.screenHeight// 获取状态栏高度this.statusBarHeight = res.statusBarHeight// 通过操作系统 确定自定义导航栏高度  if (res.system.substring(0, 3) == "iOS") {this.navBarHeight = 42} else {this.navBarHeight = 40}}})// 调用函数this.getPageID()},methods: {/* 生成随机的 pageID */getPageID() {let pageID = parseInt(Math.random() * (0 - 100 + 1) + 100) //生成 [min,max] 的随机数this.getVideoList(pageID)},/* 获取视频数据 */getVideoList(pageID) {uni.request({url: 'https://api.apiopen.top/api/getMiniVideo?page=' + pageID +'&size=10&pageSize=10', // 请求数据接口data: {},success: (res) => {if (res.data.code == 200) {res.data.result.list.forEach(item => {//取源数据的部分属性组合成新的数组let obj = {}obj.src = item.playurlobj.title = item.titlethis.originList.push(obj)})}//解决首次加载页面的时候没有画面的问题if (this.flag) {this.flag = falsethis.initSwiperData(0)}}})},changed(event) {let {current} = event.detail;let originListLength = this.originList.length;this.changeIndex = current;// console.log(this.displayIndex,current)// 如果两者的差为2或者-1则是向后滑动if (this.displayIndex - current == 2 || this.displayIndex - current == -1) {this.originIndex = this.originIndex + 1 == originListLength ? 0 : this.originIndex + 1;this.displayIndex = this.displayIndex + 1 == 3 ? 0 : this.displayIndex + 1;this.initSwiperData(this.originIndex);//如果滑到最后一条，请求新数据this.num++console.log('num',this.num,this.originList.length)if (this.num + 5 >= this.originList.length) {this.getPageID()}}// 如果两者的差为-2或者1则是向前滑动else if (this.displayIndex - current == -2 || this.displayIndex - current == 1) {this.originIndex = this.originIndex - 1 == -1 ? originListLength - 1 : this.originIndex - 1;this.displayIndex = this.displayIndex - 1 == -1 ? 2 : this.displayIndex - 1;this.initSwiperData(this.originIndex);if (this.num > 0) {this.num--}}},initSwiperData(originIndex = this.originIndex) {// console.log(this.displayIndex,originIndex)// 0 0// 1 1// 2 2// 0 3// 1 4//源数据长度let originListLength = this.originList.length;let displayList = [];displayList[this.displayIndex] = this.originList[originIndex];displayList[this.displayIndex - 1 == -1 ? 2 : this.displayIndex - 1] = this.originList[originIndex - 1 == -1 ? originListLength - 1 : originIndex - 1];displayList[this.displayIndex + 1 == 3 ? 0 : this.displayIndex + 1] = this.originList[originIndex + 1 ==originListLength ? 0 : originIndex + 1];// console.log(originIndex, (originIndex - 1 == -1 ? originListLength - 1 : originIndex - 1), (originIndex +// 	1 == originListLength ? 0 : originIndex + 1))// 0 9 1// 1 0 2// 2 1 3// 3 2 4// 4 3 5//刷新数据this.displaySwiperList = displayList;// console.log(this.displaySwiperList,this.originList)},}}
</script><style>swiper {width: 100%;background: #000}swiper-item {height: 100%;width: 100%}video {height: 96%;width: 100%}.video-text {position: absolute;margin-left: 32rpx;width: 580rpx;bottom: 200rpx;z-index: 9999;}.tips {width: 560rpx;font-size: 26rpx;color: #ffffff;}
</style>

注解：

autoplay="true"：设置视频在加载完成后自动播放。
controls="true"：显示视频的控制面板，包括播放/暂停按钮、音量控制、进度条和全屏按钮等。
custom-cache="false"：禁用视频的自定义缓存，在每次播放时都重新加载视频。
loop="false"：设置视频不循环播放，当播放完成后停止。
enable-play-gesture="true"：启用手势控制，允许通过手势来播放/暂停视频。
enable-progress-gesture="true"：启用手势控制，允许通过手势来调整视频播放的进度。
show-center-play-btn="true"：显示一个居中的播放按钮，当视频处于暂停状态时，点击按钮可以播放视频。

进一步希望能够实现上滑到第一个视频之后，关闭循环无法再上滑

<swiper :circular="!canCircular" >
</swiper>computed: {canCircular() {console.log(Boolean((this.originIndex + 1 == this.originList.length ? 0 : this.originIndex + 1) == 1))return (this.originIndex + 1 == this.originList.length ? 0 : this.originIndex + 1) == 1; }
}

第一个视频再上滑弹出提示框

<swiper @transition="transition">
</swiper>transition(e) {// console.log(e)let originListLength = this.originList.length;if ((this.originIndex + 1 == originListLength ? 0 : this.originIndex + 1) == 1 && e.detail.dy < -100) {uni.showToast({title: '已经到顶了',icon: 'none'})}
}

注解：

swiper-item 的位置发生改变时会触发 transition 事件，通过判断是否为第一个视频 && 进行了上滑行为来控制弹出”已经到顶的提示“

完整代码：

<template><view><!--swiper实现整屏划动播放视频--><swiper :circular="!canCircular" vertical duration="200" @transition="transition" @change="changed":style="{height: screenHeight-navBarHeight +'px'}"><block v-for="(item,index) in displaySwiperList" :key="index"><swiper-item><!-- v-if="index==changeIndex" 只渲染当前页的视频，能够有效解决数组不断追加后引起黑屏的问题 --><video v-if="index==changeIndex" :src="item.src" autoplay="true" controls="true"custom-cache="false" loop="false" enable-play-gesture="true" enable-progress-gesture="true"show-center-play-btn="true"></video><!-- 文本标题 --><view class="video-text"><view class="tips"> {{item.title}} </view></view></swiper-item></block></swiper></view>
</template><script>export default {data() {return {screenHeight: 0,statusBarHeight: 0,navBarHeight: 0,originList: [], // 源数据displaySwiperList: [], // swiper需要的数据displayIndex: 0, // 用于显示swiper的真正的下标数值只有：0，1，2。originIndex: 0, // 记录源数据的下标changeIndex: 0, //控制video是否渲染page: 0, // 视频分页num: 0,flag: true}},computed: {canCircular() {console.log(Boolean((this.originIndex + 1 == this.originList.length ? 0 : this.originIndex + 1) == 1))return (this.originIndex + 1 == this.originList.length ? 0 : this.originIndex + 1) == 1; }},onLoad() {/* 获取系统信息 */wx.getSystemInfo({success: (res) => {// 获取屏幕高度this.screenHeight = res.screenHeight// 获取状态栏高度this.statusBarHeight = res.statusBarHeight// 通过操作系统 确定自定义导航栏高度  if (res.system.substring(0, 3) == "iOS") {this.navBarHeight = 42} else {this.navBarHeight = 40}}})// 调用函数this.getPageID()},methods: {transition(e) {// console.log(e)let originListLength = this.originList.length;if ((this.originIndex + 1 == originListLength ? 0 : this.originIndex + 1) == 1 && e.detail.dy < -100) {uni.showToast({title: '已经到顶了',icon: 'none'})}},/* 生成随机的 pageID */getPageID() {let pageID = parseInt(Math.random() * (0 - 100 + 1) + 100) //生成 [min,max] 的随机数this.getVideoList(pageID)},/* 获取视频数据 */getVideoList(pageID) {uni.request({url: 'https://api.apiopen.top/api/getMiniVideo?page=' + pageID +'&size=10&pageSize=10', // 请求数据接口data: {},success: (res) => {if (res.data.code == 200) {res.data.result.list.forEach(item => {//取源数据的部分属性组合成新的数组let obj = {}obj.src = item.playurlobj.title = item.titlethis.originList.push(obj)})}//解决首次加载页面的时候没有画面的问题if (this.flag) {this.flag = falsethis.initSwiperData(0)}}})},changed(event) {let {current} = event.detail;let originListLength = this.originList.length;this.changeIndex = current;// console.log(this.displayIndex,current)// 如果两者的差为2或者-1则是向后滑动if (this.displayIndex - current == 2 || this.displayIndex - current == -1) {this.originIndex = this.originIndex + 1 == originListLength ? 0 : this.originIndex + 1;this.displayIndex = this.displayIndex + 1 == 3 ? 0 : this.displayIndex + 1;this.initSwiperData(this.originIndex);//如果滑到最后一条，请求新数据this.num++console.log('num',this.num,this.originList.length)if (this.num + 5 >= this.originList.length) {this.getPageID()}}// 如果两者的差为-2或者1则是向前滑动else if (this.displayIndex - current == -2 || this.displayIndex - current == 1) {this.originIndex = this.originIndex - 1 == -1 ? originListLength - 1 : this.originIndex - 1;this.displayIndex = this.displayIndex - 1 == -1 ? 2 : this.displayIndex - 1;this.initSwiperData(this.originIndex);if (this.num > 0) {this.num--}}},initSwiperData(originIndex = this.originIndex) {// console.log(this.displayIndex,originIndex)// 0 0// 1 1// 2 2// 0 3// 1 4//源数据长度let originListLength = this.originList.length;let displayList = [];displayList[this.displayIndex] = this.originList[originIndex];displayList[this.displayIndex - 1 == -1 ? 2 : this.displayIndex - 1] = this.originList[originIndex - 1 == -1 ? originListLength - 1 : originIndex - 1];displayList[this.displayIndex + 1 == 3 ? 0 : this.displayIndex + 1] = this.originList[originIndex + 1 ==originListLength ? 0 : originIndex + 1];// console.log(originIndex, (originIndex - 1 == -1 ? originListLength - 1 : originIndex - 1), (originIndex +// 	1 == originListLength ? 0 : originIndex + 1))// 0 9 1// 1 0 2// 2 1 3// 3 2 4// 4 3 5//刷新数据this.displaySwiperList = displayList;// console.log(this.displaySwiperList,this.originList)},}}
</script><style>swiper {width: 100%;background: #000}swiper-item {height: 100%;width: 100%}video {height: 96%;width: 100%}.video-text {position: absolute;margin-left: 32rpx;width: 580rpx;bottom: 200rpx;z-index: 9999;}.tips {width: 560rpx;font-size: 26rpx;color: #ffffff;}
</style>

小爱心效果

<!DOCTYPE html>
<html><head><title>点赞特效</title><style>body {margin: 0;padding: 0;overflow: hidden;}#heart {position: absolute;top: 50%;left: 50%;width: 100px;height: 100px;border-radius: 50%;background: red;transform: translate(-50%, -50%);animation: heartBeat 1s linear infinite;}@keyframes heartBeat {0% {transform: scale(1);}50% {transform: scale(1.2);}100% {transform: scale(1);}}</style>
</head><body><script src="https://cdn.jsdelivr.net/npm/jquery"></script><script>$(document).ready(function () {var hearts = ["❤️", "💛", "💙", "💚", "💜", "🧡"];$(document).click(function (e) {var x = e.pageX;var y = e.pageY;var heartIcon = $("<div>").addClass("heart").text(hearts[Math.floor(Math.random() * hearts.length)]);$(heartIcon).css({position: "absolute",top: y - 10,left: x - 10,color: "red",userSelect: "none",pointerEvents: "none"});$("body").append($(heartIcon));// 1000 是动画的持续时间$(heartIcon).animate({top: y - 100,opacity: 0}, 1000, function () {$(heartIcon).remove();});});});</script>
</body></html>

效果图：

也可以将其换成爱心图片：

<!DOCTYPE html>
<html><head><title>点赞特效</title><style>body {margin: 0;padding: 0;overflow: hidden;}#heart {position: absolute;top: 50%;left: 50%;width: 100px;height: 100px;border-radius: 50%;background: red;transform: translate(-50%, -50%);animation: heartBeat 1s linear infinite;}@keyframes heartBeat {0% {transform: scale(1);}50% {transform: scale(1.2);}100% {transform: scale(1);}}</style>
</head><body><script src="https://cdn.jsdelivr.net/npm/jquery"></script><script>$(document).ready(function () {var hearts = ["❤️", "💛", "💙", "💚", "💜", "🧡"];$(document).click(function (e) {var x = e.pageX;var y = e.pageY;// var heartIcon = $("<div>").addClass("heart").text(hearts[Math.floor(Math.random() * hearts.length)]);var heartIcon = $("<img>").addClass("heart").attr("src", "./hh.png")$(heartIcon).css({position: "absolute",top: y - 10,left: x - 10,color: "red",wight:"40px",height:"40px",userSelect: "none",pointerEvents: "none"});$("body").append($(heartIcon));// 1000 是动画的持续时间$(heartIcon).animate({top: y - 100,opacity: 0}, 1000, function () {$(heartIcon).remove();});});});</script>
</body></html>

效果图：