uniapp上传预览视频组件封装

需求：要求视频拥有上传和预览功能，并且实现断点续存。
断点续存的重点在于：前端页面绑定表单值要与后端一致，这样在下一次进入页面能够请求后台接口，后台返回之前用户所填写的数据，展示在页面上，实现功能。
视频实现优化：
在uniapp中视频上传后有一个本地地址，前端可以在用户没有刷新时使用这个本地地址展示给用户，提高用户体验，因为又断点续存功能所以在用户刷新重新进入页面后，请求后台接口获取视频地址，这个地方后端可以返回一个压缩图片只有几k，当用户点击预览再展示给用户高清图。

<template>
	<view class="container">
		<!-- 默认展示视频第一帧 -->
		<view class="image-upload-Item" v-for="(item,index) in uploadLists" :key="index">
			<view class="image-upload-Item-video">
				<video :disabled="false" :controls="false" :src="getFileUrl(item)">
					<cover-view class="image-upload-Item-video-fixed" @click="previewVideo(getFileUrl(item))">
					</cover-view>
					<cover-view class="image-upload-Item-del" @click="imgDel(index)">×</cover-view>
				</video>
				<view class="image-upload-Item-video-fixed" @click="previewVideo(getFileUrl(item))"></view>
			</view>
		</view>
		<!-- 上传按钮 -->
		<view class="image-upload-Item image-upload-Item-add" @click="chooseFile">
			<u-icon name="camera" color="#999" size="30"></u-icon>
		</view>
		<!-- 全屏预览视频 -->
		<view class="preview-full" v-if="previewVideoSrc!=''">
			<video :autoplay="true" :src="previewVideoSrc" :show-fullscreen-btn="false">
				<!-- 退出全屏预览按钮 -->
				<cover-view class="preview-full-close" @click="previewVideoClose"> ×
				</cover-view>
			</video>
		</view>
	</view>
</template>

<script>
	export default {
		data(){
			return {
				// 视频播放地址
				previewVideoSrc: '',
				// 视频播放列表
				uploadLists: []
			}
		},
		methods: {
			getFileUrl(item) {
				var url = item;
				return url
			},
			previewVideo(src) {
				// 预览视频
				this.previewVideoSrc = src;
			},
			previewVideoClose(){
				this.previewVideoSrc = ''
			},
			chooseFile(){
				uni.chooseVideo({
					compressed: true,
					sourceType: ['camera', 'album'],
					camera: 'back',
					maxDuration: 60,
					success: (res) => {
						this.handleUploadFile(res.tempFilePath)
						// 前端优化点,用户未提交前存储图片用本地地址,加快速度
						// res.tempFilePath 就是一个字符串 blob:http://localhost:8081/c5bffb7f-aba2-4a2e-99fd-a8f2320afa52
					}
				});
			},
			async handleUploadFile(data) {
				const _this = this;
				// console.log(data)
				let guid = data.substring(data.lastIndexOf('/') + 1)
				const filePath = data.path || data[0];
				await uni.uploadFile({
					url: 'http://localhost:8080', //仅为示例，非真实的接口地址
					filePath: filePath,
					name: 'file',
					// 带给后端的数据
					// formData: {
					// 	guid: guid
					// },
					success: uploadFileRes => {
						console.log('uploadFileRes',uploadFileRes)
					},
					complete: () => {
						
					}
				});
			},
			imgDel(){
				
			}
		}
	}
</script>

<style scoped>
	.container {
		display: flex;
		flex-wrap: wrap;
	}
	
	.preview-full {
		position: fixed;
		top: 0;
		left: 0;
		bottom: 0;
		width: 100%;
		height: 100%;
		z-index: 1002;
	}
	
	.preview-full video {
		width: 100%;
		height: 100%;
		z-index: 1002;
	}
	
	.preview-full-close {
		position: fixed;
		right: 16px;
		top: 12px;
		width: 40px;
		height: 40px;
		line-height: 30px;
		text-align: center;
		z-index: 1003;
		color: #fff;
		font-size: 32px;
		font-weight: bold;
	}
	
	.image-upload-Item {
		width: 80px;
		height: 80px;
		position: relative;
		margin: 5px;
	}
	.image-upload-Item-add {
		font-size: 52px;
		text-align: center;
		color: #999999;
		margin: 5px;
		display: flex;
		justify-content: center;
	}
	
	.image-upload-Item-video {
		width: 100%;
		height: 100%;
		position: relative;
	}
	
	.image-upload-Item-video-fixed {
		position: absolute;
		top: 0;
		left: 0;
		bottom: 0;
		width: 100%;
		height: 100%;
		z-index: 996;
	}
	
	.image-upload-Item video {
		width: 100%;
		height: 100%;
	}
	
	.image-upload-Item-del {
		font-size: 25px;
		position: absolute;
		width: 17px;
		height: 17px;
		line-height: 17px;
		text-align: center;
		top: 0;
		right: 0;
		z-index: 997;
		color:  #999;
	}
</style>