uniapp中swiper的大坑，在swiper-item中嵌套video在移动端无法实现上下滑动的，要用nvue代替，从而实现抖音滑视频效果

浅浅的花香味﹌ 2023-10-04 19:12 7阅读 0赞

### 问题描述： ###

想做一个抖音滑屏切换视频的效果，结果。。。。。

研究了一天，发现在swiper-item中嵌套视频时，移动端只能滑动切换背景，视频在原位置是不会动的。。。。但是在h5端和小程序端可以完美运行，这就很让人生气了：

![bd37191df9374ce2ba3fa98e5394a476.png][]

在移动端的时候，就会出现虽然切换到第二个视频了，声音也出来了，但是画面就是没有动。。。。。还是上一个视频的画面，这是因为视频的层级较高导致的，需要使用nvue方案：

[介绍 | uni-app官网][_ uni-app]：使用nvue的教程；

这句话就很重要了，因为h5页面端切换是咩有问题的，所以需要为移动端单独建一个nvue文件，这时候就用到了这条规则：

![227942c02a3243f9855d8e3d0aa4eead.png][]

为移动端创建单独的页面：包括视频组件也是要单独创建一个nvue的

![ad457485b82f41219db8be558f2da941.png][]

videos.vue代码:

<template>
    	<swiper class="swiper" :vertical="true" @change="change" @touchstart="touchStart" @touchend="touchEnd">
    		<swiper-item v-for="item of list" :key="item.id" class="swiper-item">
    			<videoPlayer :video="item" ref="player"></videoPlayer>
    			
    		</swiper-item>
    	</swiper>
    </template>
    
    <script>
    	import videoPlayer from "./components/videoPlayer.vue"
    	var time = null
    	export default {
    		props: ["myList"],
    		components: {
    			videoPlayer,
    		},
    		name: "video-list",
    		data() {
    			return {
    				list: [{
    						id: 1,
    						preImg: "http://p1-q.mafengwo.net/s16/M00/8D/4D/CoUBUmFZOWKAA8mQAA8Oww0vs7k240.jpg",
    						src: "https://txmov2.a.yximgs.com/upic/2020/11/08/19/BMjAyMDExMDgxOTQxNTlfNTIzNDczMzQ0XzM4OTQ1MDk5MTI4XzFfMw==_b_Bc770a92f0cf153407d60a2eddffeae2a.mp4"
    					},
    					{
    						id: 2,
    						preImg: "http://b1-q.mafengwo.net/s16/M00/23/F3/CoUBUmFbN5OAGqEkAA4O0V-U1uo031.jpg",
    						src: "https://txmov2.a.yximgs.com/upic/2020/10/02/09/BMjAyMDEwMDIwOTAwMDlfMTIyMjc0NTk0Ml8zNjk3Mjg0NjcxOF8xXzM=_b_B28a4518e86e2cf6155a6c1fc9cf79c6d.mp4"
    					},
    					{
    						id: 3,
    						preImg: "http://p1-q.mafengwo.net/s16/M00/23/F4/CoUBUmFbN5WAbMikAA5cYlWno5U709.jpg",
    						src: "https://txmov6.a.yximgs.com/upic/2020/08/23/00/BMjAyMDA4MjMwMDMyNDRfMTYzMzY5MDA0XzM0ODI4MDcyMzQ5XzFfMw==_b_B9a1c9d4e3a090bb2815994d7f33a906a.mp4"
    					},
    					{
    						id: 4,
    						preImg: "http://p1-q.mafengwo.net/s18/M00/E6/C0/CoUBYGFceTyAOSBqABFXcMPFJ1w112.jpg",
    						src: "https://alimov2.a.yximgs.com/upic/2020/07/02/14/BMjAyMDA3MDIxNDUyMDlfOTExMjIyMjRfMzE1OTEwNjAxNTRfMV8z_b_Bf3005d42ce9c01c0687147428c28d7e6.mp4"
    					}
    				],
    				pageStartY: 0,
    				pageEndY: 0,
    				swiperHeight: "0"
    			};
    		},
    		methods: {
    			change(res) {
    				clearTimeout(time)
    				this.page = res.detail.current
    				time = setTimeout(() => {
    					if (this.pageStartY > this.pageEndY) {
    						console.log("向上滑动" + this.page);
    						this.$refs.player[this.page].playVideo()
    						this.$refs.player[this.page - 1].pauseVideo()
    						this.pageStartY = 0
    						this.pageEndY = 0
    					} else {
    						console.log("向下滑动" + this.page);
    						this.$refs.player[this.page].playVideo()
    						this.$refs.player[this.page + 1].pauseVideo()
    						this.pageStartY = 0
    						this.pageEndY = 0
    					}
    				}, 1)
    			},
    			touchStart(res) {
    				this.pageStartY = res.changedTouches[0].pageY;
    				console.log(this.pageStartY);
    			},
    			touchEnd(res) {
    				this.pageEndY = res.changedTouches[0].pageY;
    				console.log(this.pageEndY);
    			}
    		},
    		watch: {
    			myList() {
    				this.list = this.myList;
    			}
    		}
    	}
    </script>
    
    <style>
    	.swiper {
    		width: 100vw;
    		height: 100vh;
    	}
    
    	.swiper-item {
    		width: 100vw;
    		height: 100vh;
    		z-index: 9;
    	}
    
    	.swiper-img {
    		width: 100%;
    		height: 100%;
    	}
    
    	/* 	.left-box {
    		z-index: 20;
    		position: absolute;
    		bottom: 50px;
    		left: 10px;
    	}
    
    	.right-box {
    		z-index: 20;
    		position: absolute;
    		bottom: 50px;
    		right: 10px;
    	} */
    </style>

videoPlayer.vue代码:

<template>
    	<video :id="'myVideo'+ video.id" @click="click" @play="changePlay" class="video" :controls="false" :loop="false"
    		:src="video.src">
    	</video>
    </template>
    
    <script>
    	export default {
    		props: ['video'],
    		name: "videoPlayer",
    		data() {
    			return {
    				play: false
    			};
    		},
    		onReady() {
    			this.videoContext = uni.createVideoContext("myVideo" + this.video.id, this)
    			console.log("视频组件onready:");
    			// console.log(this.videoContext);
    		},
    		mounted() {
    			this.videoContext = uni.createVideoContext("myVideo" + this.video.id, this)
    		},
    		methods: {
    			click() {
    				console.log("click", this.video.id, this.play);
    				if (!this.play) {
    					this.playthis()
    				} else {
    					this.pauseVideo()
    				}
    			},
    			playVideo() {
    				if (this.play === false) {
    					console.log("playVideo", this.video.id);
    					this.videoContext.seek(0)
    					this.videoContext.play()
    					this.play = true
    				}
    			},
    			pauseVideo() {
    				console.log("pauseVideo", this.video.id);
    				if (this.play === true) {
    					this.videoContext.pause()
    					this.play = false
    				}
    			},
    			playthis() {
    				// console.log("playthis", this.video.id);
    				if (this.play === false) {
    					console.log("playthis", this.video.id);
    					this.videoContext.play()
    					this.play = true
    				}
    			},
    			changePlay() {
    				console.log("changePlay");
    				this.play = true
    			}
    		}
    	}
    </script>
    
    <style>
    	.video {
    		width: 100vw;
    		height: 100vh;
    		/* z-index: 1; */
    	}
    
    	/* 	.video {
    		height: 100%;
    		width: 100%;
    		z-index: 1;
    	} */
    </style>

videos.nvue代码：

<template>
    	<swiper class="swiper" :style="{height:screenHeight+'px'}" :vertical="true" @change="change"
    		@touchstart="touchStart" @touchend="touchEnd">
    		<swiper-item v-for="item of list" :style="{height:screenHeight+'px'}" :key="item.id" class="swiper-item">
    			<videoPlayer :video="item" :screenHeight="screenHeight" ref="player"></videoPlayer>
    		</swiper-item>
    	</swiper>
    </template>
    
    <script>
    	import videoPlayer from "./components/videoPlayer.nvue"
    	var time = null
    	export default {
    		props: ["myList"],
    		components: {
    			videoPlayer,
    		},
    		name: "video-list",
    		data() {
    			return {
    				list: [{
    						id: 1,
    						preImg: "http://p1-q.mafengwo.net/s16/M00/8D/4D/CoUBUmFZOWKAA8mQAA8Oww0vs7k240.jpg",
    						src: "https://txmov2.a.yximgs.com/upic/2020/11/08/19/BMjAyMDExMDgxOTQxNTlfNTIzNDczMzQ0XzM4OTQ1MDk5MTI4XzFfMw==_b_Bc770a92f0cf153407d60a2eddffeae2a.mp4"
    					},
    					{
    						id: 2,
    						preImg: "http://b1-q.mafengwo.net/s16/M00/23/F3/CoUBUmFbN5OAGqEkAA4O0V-U1uo031.jpg",
    						src: "https://txmov2.a.yximgs.com/upic/2020/10/02/09/BMjAyMDEwMDIwOTAwMDlfMTIyMjc0NTk0Ml8zNjk3Mjg0NjcxOF8xXzM=_b_B28a4518e86e2cf6155a6c1fc9cf79c6d.mp4"
    					},
    					{
    						id: 3,
    						preImg: "http://p1-q.mafengwo.net/s16/M00/23/F4/CoUBUmFbN5WAbMikAA5cYlWno5U709.jpg",
    						src: "https://txmov6.a.yximgs.com/upic/2020/08/23/00/BMjAyMDA4MjMwMDMyNDRfMTYzMzY5MDA0XzM0ODI4MDcyMzQ5XzFfMw==_b_B9a1c9d4e3a090bb2815994d7f33a906a.mp4"
    					},
    					{
    						id: 4,
    						preImg: "http://p1-q.mafengwo.net/s18/M00/E6/C0/CoUBYGFceTyAOSBqABFXcMPFJ1w112.jpg",
    						src: "https://alimov2.a.yximgs.com/upic/2020/07/02/14/BMjAyMDA3MDIxNDUyMDlfOTExMjIyMjRfMzE1OTEwNjAxNTRfMV8z_b_Bf3005d42ce9c01c0687147428c28d7e6.mp4"
    					}
    				],
    				pageStartY: 0,
    				pageEndY: 0,
    				screenHeight: 0
    			};
    		},
    		mounted() {
    			uni.getSystemInfo({
    				success: (res) => {
    					console.log("首页获取到的页面高度:windowHeight", res.windowHeight);
    					this.screenHeight = res.windowHeight
    				}
    			});
    		},
    		methods: {
    			change(res) {
    				clearTimeout(time)
    				this.page = res.detail.current
    				time = setTimeout(() => {
    					if (this.pageStartY > this.pageEndY) {
    						console.log("向上滑动" + this.page);
    						this.$refs.player[this.page].playVideo()
    						this.$refs.player[this.page - 1].pauseVideo()
    						this.pageStartY = 0
    						this.pageEndY = 0
    					} else {
    						console.log("向下滑动" + this.page);
    						this.$refs.player[this.page].playVideo()
    						this.$refs.player[this.page + 1].pauseVideo()
    						this.pageStartY = 0
    						this.pageEndY = 0
    					}
    				}, 1)
    			},
    			touchStart(res) {
    				this.pageStartY = res.changedTouches[0].pageY;
    				console.log(this.pageStartY);
    			},
    			touchEnd(res) {
    				this.pageEndY = res.changedTouches[0].pageY;
    				console.log(this.pageEndY);
    			}
    		},
    		watch: {
    			myList() {
    				this.list = this.myList;
    			}
    		}
    	}
    </script>
    
    <style>
    	.swiper {
    		width: 750rpx;
    		/* height: 500vh; */
    	}
    
    	.swiper-item {
    		width: 750rpx;
    		/* height: 500vh; */
    		z-index: 9;
    	}
    
    	.swiper-img {
    		width: 100vw;
    		height: 100vh;
    	}
    
    	/* 	.left-box {
    		z-index: 20;
    		position: absolute;
    		bottom: 50px;
    		left: 10px;
    	}
    
    	.right-box {
    		z-index: 20;
    		position: absolute;
    		bottom: 50px;
    		right: 10px;
    	} */
    </style>

videoPlayer.nvue代码：

<template>
    	<video :id="'myVideo'+ video.id" @click="click" @play="changePlay" class="video" :controls="false" :loop="false"
    		:src="video.src" :poster="video.preImg" :style="{height:screenHeight+'px'}">
    	</video>
    </template>
    
    <script>
    	export default {
    		props: ['video', "screenHeight"],
    		name: "videoPlayer",
    		data() {
    			return {
    				play: false,
    				screenHeight: 0
    			};
    		},
    		onReady() {
    			this.videoContext = uni.createVideoContext("myVideo" + this.video.id, this)
    			console.log("视频组件onready:");
    		},
    		mounted() {
    			this.videoContext = uni.createVideoContext("myVideo" + this.video.id, this)
    		},
    		methods: {
    			click() {
    				console.log("click", this.video.id, this.play);
    				if (!this.play) {
    					this.playthis()
    				} else {
    					this.pauseVideo()
    				}
    			},
    			playVideo() {
    				if (this.play === false) {
    					console.log("playVideo", this.video.id);
    					this.videoContext.seek(0)
    					this.videoContext.play()
    					this.play = true
    				}
    			},
    			pauseVideo() {
    				console.log("pauseVideo", this.video.id);
    				if (this.play === true) {
    					this.videoContext.pause()
    					this.play = false
    				}
    			},
    			playthis() {
    				// console.log("playthis", this.video.id);
    				if (this.play === false) {
    					console.log("playthis", this.video.id);
    					this.videoContext.play()
    					this.play = true
    				}
    			},
    			changePlay() {
    				console.log("changePlay");
    				this.play = true
    			}
    		}
    	}
    </script>
    
    <style>
    	.video {
    		width: 750rpx;
    	}
    
    	/* 	.video {
    		height: 100%;
    		width: 100%;
    		z-index: 1;
    	} */
    </style>

唯一不一样的就是增加了动态适配手机屏幕高度的方法：注意获取到的高度单位是px，不要用混了，我之前用的视口单位，结果。。。。惨剧

![4e0b8ef9c955477ea390a3b64049d0a9.png][]

为什么要动态设置这个高度呢？因为官方说了：

[nvue所支持的通用样式已在本文档中全部列出，一些组件可能有自定义样式，请参考组件文档。除此之外的属性，均不被支持。 | uni-app官网][nvue_ _ uni-app]

![bdd02b1ea2db4fc8967d13443f303235.png][]

我也很无语啊。。。。。。。。。

那就只能这么写了，为什么不动态设置宽度呢？因为官方默认把屏幕划分为750等份了，所以宽的设置：

![12f8d019d371448a9cdaf089460a7b14.png][]

同样子组件中也要设置高度：

![25c8563bf91e48978431fdf899d1179f.png][]

最终的效果就是移动端和h5还有小程序都可以完美上下滑动了

[bd37191df9374ce2ba3fa98e5394a476.png]: https://img-blog.csdnimg.cn/bd37191df9374ce2ba3fa98e5394a476.png
[_ uni-app]: https://uniapp.dcloud.io/tutorial/nvue-outline.html
[227942c02a3243f9855d8e3d0aa4eead.png]: https://img-blog.csdnimg.cn/227942c02a3243f9855d8e3d0aa4eead.png
[ad457485b82f41219db8be558f2da941.png]: https://img-blog.csdnimg.cn/ad457485b82f41219db8be558f2da941.png
[4e0b8ef9c955477ea390a3b64049d0a9.png]: https://img-blog.csdnimg.cn/4e0b8ef9c955477ea390a3b64049d0a9.png
[nvue_ _ uni-app]: https://uniapp.dcloud.io/tutorial/nvue-css.html
[bdd02b1ea2db4fc8967d13443f303235.png]: https://img-blog.csdnimg.cn/bdd02b1ea2db4fc8967d13443f303235.png
[12f8d019d371448a9cdaf089460a7b14.png]: https://img-blog.csdnimg.cn/12f8d019d371448a9cdaf089460a7b14.png
[25c8563bf91e48978431fdf899d1179f.png]: https://img-blog.csdnimg.cn/25c8563bf91e48978431fdf899d1179f.png