video 也可以 播放 MP3 音频，当不想让 视频显示出来的话，可以 给 video 设置宽和高 1rpx ，不可以隐藏

<template>
	<view class="form2box">
		<u-navbar  @leftClick="leftClick">
			<view slot="left">
				<image src="@/static/img/fanhui.png" mode="" class="u-w-56 u-h-56" ></image>
			</view>
		</u-navbar>
		<view class="content">
			<video id="myVideo" 
			class="u-w-714"
			autoplay
			:style="{'height':winheight+'px'}"   
			:src="videosrc"
			object-fit='cover'
			:controls='true'
			:show-fullscreen-btn='false'
			:show-center-play-btn='false'
			:show-play-btn='false'
			:loop='loop'
			@ended='endedFun'
			></video>
			<!-- 暂停 图标TODO..-->
			<image src="@/static/img/zan1.png" mode="" class="anniu" @click="playFun(1)" v-if="item == 0"></image>
			<!-- 播放 -->
			<image src="@/static/img/you.png" mode="" class="anniu" @click="playFun(0)" v-if="item == 1"></image> 
		</view>
		<view class="fixbox">
			<!-- 图标TODO..  -->
			<view class="flex_col flex_between" @click="loopFun">
				<image src="../../static/img/zan1.png" mode="" class="u-w-134 u-h-134"  v-if="loop"></image>
				<image src="../../static/img/xunhuan.png" mode="" class="u-w-134 u-h-134" v-else></image>
				<view class="text"> {{loop ? '暂停' : '循环播放'}}</view>
			</view>
			<view class="you ">
				<view class="scrollbox" v-if="scrollShow">
					<view 
					v-for="(item,i) in timeList" :key="i"
					class="u-m-b-10"
					:class="item.choose ? 'ac' :''"
					@click="timeFun(i)"
					>{{item.time}}s</view>
				</view>
				<view class="flex_col flex_between" @click="scrollShow=!scrollShow">
					<view class="miao">{{time}}s</view>
					<view class="text">间隔距离</view>
				</view>
			</view>
		</view>
	</view>
</template>

<script>
	// import {
	//   xxx
	//  } from "@/api/index/index.js"
	export default {
		components: {},
		data() {
			return {
				winheight:0,
				item:1, // 1默认播放 0暂停
				videosrc:'https://qiniu-web-assets.dcloud.net.cn/unidoc/zh/2minute-demo.mp4', // 视频
				videoContext:'',
				loop:true, // 是否循环播放 默认true是
				scrollShow:false, // 时间间隔默认不显示false
				timeList:[
					{choose:false,time:'1.0'},
					{choose:false,time:'1.5'},
					{choose:false,time:'2.0'},
					{choose:true,time:'2.5'},
					{choose:false,time:'3.0'},
					{choose:false,time:'3.5'},
					{choose:false,time:'4.0'},
					{choose:false,time:'4.5'},
					{choose:false,time:'5.0'},
				],
				time:'2.5' // 时间间隔 默认2.5s
			}
		},
		onLoad(option) {
			let that = this;
			uni.getSystemInfo({
				success: function (res) {
					// deviceOrientation获取到设备方向，横屏还是竖屏
					that.winheight = res.windowHeight - 240;
				}
			});
			this.videoContext = uni.createVideoContext("myVideo", this);
			// 播放速度
			// this.videoContext.playbackRate(Number(2.0))
		},
		methods: {
			playFun(num){
				this.item = num;
				if(num == 1){
					console.log('播放');
					this.$nextTick(() => {
						this.videoContext.play();
					});
				} else {
					console.log('暂停');
					this.$nextTick(() => {
						this.videoContext.pause();
					});
				}
			},
			// 是否循环播放
			loopFun(){
				this.loop = !this.loop;
				console.log(this.loop,'循环播放')
				if(this.item == 1 &&this.loop){
					this.videoContext.play();
				}
			},
			// 选中 时间间隔，自动默认循环和开始播放
			timeFun(i){
				this.timeList.forEach((item,index) => {
						if(i == index){
							item.choose = true;
							this.time = item.time;
							this.scrollShow = false;
							this.loop = true;
							this.item = 1;
						} else {
							item.choose = false;
						}
				});
			},
			//  当播放到末尾时触发 ended 事件，先暂停再延迟多长时间重新播放
			endedFun(){
				let that = this;
				let a = Number(this.time)*1000;
				
				this.$nextTick(() => {
					this.videoContext.pause();
				});
				
				setTimeout(function() {
					if(that.item == 1 && that.loop){
						console.log('延迟时间开始播放了',a);
						that.videoContext.play();
					}
				}, a);
			},
			leftClick(){
				uni.navigateBack();
			}
		},
	}
</script>

<style lang='scss'>
	page{
		background: #F8F8F8;
	}
	
</style>
<style lang='scss' scoped>
	.form2box{
		.content{
			padding: 0 18rpx;
			box-sizing: border-box;
			width:750rpx;
			position: relative;
			.anniu{
				position: absolute;
				bottom: -107rpx;
				left: 50%;
				transform: translateX(-50%);
				width: 214rpx;
				height: 214rpx;
			}
		}
		.fixbox{
			position: fixed;
			bottom: 100rpx;
			width:750rpx;
			box-sizing: border-box;
			background: #FAFAFA;
			display: flex;
			align-items: center;
			justify-content: space-around;
			.miao{
				width: 134rpx;
				height:134rpx;
				line-height: 134rpx;
				text-align: center;
				color: #B0B0B0;
				font-size: 33.33rpx;
				font-family: MicrosoftYaHei;
			}
			.text{
				margin-top: 25rpx;
				font-family: Adobe Heiti Std R;
				font-size: 25rpx;
				color: #000000;
			}
			.you{
				position: relative;
				.scrollbox{
					box-sizing: border-box;
					position: absolute;
					top: -385rpx;
					left: -15rpx;
					background-color: #fff;
					width: 248rpx;
					border: 2rpx solid #000000;
					color:#B0B0B0;
					font-size: 25rpx;
					font-family: MicrosoftYaHei;
					padding: 20rpx 25rpx 0;
					.ac{
						color: #000000;
					}
				}
			}
		}
	}
</style>