uniapp+uview封装上传图片组件(单张/多张)

先看效果

1.uploadImg.vue

<template>
	<view class="uploadImg flex-d flex-wrap">
		<!-- 多张图片上传 -->
		<view class="imgList imgArr flex-d flex-wrap" v-for="(item,index) in fileList" :key="index" v-if="maxCount>1 && fileList.length">
			<image class="imgListArr" :src="item" @click="clickImg(item)"></image>
			<view class="iconClose" @click.stope="closeImgOne(index)">
				<u-icon name="close-circle-fill" color="rgba(234, 30, 55, 1)" size="24"></u-icon>
			</view>
		</view>
		<!-- 单张图片上传 -->
		<view class="imgList imgArr" v-if="oneImgurl && maxCount==1">
			<image :src="oneImgurl" @click="clickImg(oneImgurl)"></image>
			<view class="iconClose" @click.stope="closeImg">
				<u-icon name="close-circle-fill" color="rgba(234, 30, 55, 1)" size="24"></u-icon>
			</view>
		</view>
		<u-upload @afterRead="uploadImgFile" @delete="deletePic" name="3" :previewFullImage="true" :maxCount="maxCount" :width="width" :height="height" :multiple="multiple" maxSize="50242880" :deletable="deletable" v-if="!imgUrl && maxCount<2 && !multiple"></u-upload>
		<u-upload @afterRead="uploadImgFile" @delete="deletePic" name="3" :previewFullImage="true" :maxCount="maxCount" :width="width" :height="height" :multiple="multiple" maxSize="50242880" :deletable="deletable" v-if="multiple && (fileList.length<maxCount)"></u-upload>
	</view>
</template>

<script>
	const app = getApp()
	export default {
		props: {
			maxCount: { //多张图片上传个数
				type: String,
				default: '1'
			},
			width: { //多张图片的宽度
				type: Number | String,
				default: 104
			},
			height: { //多张图片的高度
				type: Number | String,
				default: 104
			},
			file: { //多张图片返回的数组
				type: Array,
				value: []
			},
			imgUrl: { //单张图片返回的地址
				type: String,
				default: ''
			},
			multiple: { // 当设置 multiple 为 true 时, file 为数组格式，否则为对象格式
				type: Boolean,
				default: false
			},
			scene: { //参数
				type: String,
				default: ''
			},
			field: { //返回的字段名称
				type: String,
				default: ''
			}
		},
		watch: {
			file: {
				handler(oldValue) {
					this.fileList = oldValue
				}
			},
			imgUrl: {
				handler(newval) {
					this.oneImgurl = newval
				}
			}
		},
		data() {
			return {
				fileList: this.file,
				show: false,
				img: {},
				oneImgurl: this.imgUrl,
				deletable: false,
				clipperWidth: app.globalData.screenWidth
			}
		},

		methods: {
			// 删除图片
			deletePic(event) {
				this.fileList.splice(event.index, 1)
				this.$emit('getImgList', this.fileList)
			},
			// 上传图片
			uploadImgFile(event) {
				this.afterRead(event)
			},
			// 新增图片
			async afterRead(event) {
				// 当设置 mutiple 为 true 时, file 为数组格式，否则为对象格式
				let lists = event.file
				if (this.maxCount < 2) {
					const result = await this.uploadFilePromise(event.file)
					this.$emit('getImg', {
						url: result.data.original,
						field: this.field
					})
				} else {
					for (let i = 0; i < lists.length; i++) {
						const result = await this.uploadFilePromise(lists[i])
						this.fileList.push(result.data.original)
						this.$emit('getImg', {
							list: this.fileList,
							field: this.field
						})
					}
				}
			},
			uploadFilePromise(item) {
				var formData = {};
				return new Promise((resolve, reject) => {
					formData.scene = this.scene
					let a = uni.uploadFile({
						url: app.globalData.reqUrl + '/****/****/***',
						filePath: item.url,
						name: 'image',
						formData: formData,
						success: (res) => {
							let datas = JSON.parse(res.data)
							resolve(datas)
						},
						fail: (err) => {
							uni.showToast({
								title: '上传失败',
								icon: 'none'
							})
						}
					});
				})
			},
			// 数组图片删除单个
			closeImgOne(idx) {
				this.fileList.splice(idx, 1)
				this.$emit('getImg', {
					list: this.fileList,
					field: this.field
				})
			},
			// 单个图片上传
			closeImg() {
				this.oneImgurl = ''
				this.$emit('getImg', {
					url: this.oneImgurl,
					field: this.field
				})
			},
			// 图片放大查看
			clickImg(url) {
				let _this = this;
				let imgsArray = [];
				imgsArray[0] = url
				uni.previewImage({
					current: 0,
					urls: imgsArray
				});
			}
		}
	}
</script>

<style lang="scss" scope>
	.imgList {
		image {
			width: 168rpx;
			height: 168rpx;
			border-radius: 16rpx;
			margin: 0 28rpx 20rpx 0
		}
	}

	.imgListArr {
		width: 168rpx;
		height: 168rpx;
		border-radius: 16rpx;
		margin: 0 30rpx 30rpx 0
	}

	.imgArr {
		position: relative;
	}

	.iconClose {
		position: absolute;
		top: -20rpx;
		right: -10rpx;
	}
</style>

使用方式test.vue

// 多张
<uploadImg :file="imgList" maxCount='5' field="imgListItem" @getImg="getImg" :multiple="true" width="168rpx" height="168rpx" scene="err_image" need_thumbnail="1">
</uploadImg>

// 单张
<!-- <uploadImg :imgUrl="img" maxCount='1' @getImg="getImg" field="img">
</uploadImg> -->

// js

// 获取图片
getImg(val) {
	console.log(val)
},