uniapp微信小程序需要一个上传图片的组件，不过接口要求将选中的文件转为base64上传，所以对图片上传组件做了二次处理
对组件 uniapp uview upload上传图片后获取图片拼接字符串做了修改调整

需要的功能 uniapp 选择文件并转为base64
需要获取文件后缀名

组件源码

<template>
	<u-upload :width='width+"rpx"' :height='height+"rpx"' :fileList="fileList1" @afterRead="afterRead($event)"
		@delete="deletePic" name="1" :maxCount="maxCount">
		<slot></slot>
	</u-upload>
</template>

<script>
	import {
		UpLoadImg
	} from '@/config/api.js'
	import configs from '@/config/config.js'
	import {
		getSuffix
	} from '@/utils/util.js'
	import {
		pathToBase64,
		base64ToPath
	} from 'image-tools'
	export default {
		data() {
			return {
				fileList1: []
			}
		},
		props: {
			width: {
				type: Number,
				default () {
					return 200;
				}
			},
			height: {
				type: Number,
				default () {
					return 200;
				}
			},
			maxCount: {
				type: Number,
				default () {
					return 1;
				}
			},
			list: {
				type: Array,
				default () {
					return [];
				}
			}
		},
		watch: {
			list() {
				if (this.list) {
					this.fileList1 = []
					this.list.forEach((type) => {
						var dataurl = {
							url: configs.baseUrl + type
						}
						this.$emit('getdata', type)
						this.fileList1.push(dataurl)
					});
				}
			},
		},
		mounted() {
			if (this.list) {
				this.fileList1 = []
				this.list.forEach((type) => {
					var dataurl = {
						url: configs.baseUrl + type
					}
					this.$emit('getdata', type)
					this.fileList1.push(dataurl)
				});
			}
		},
		methods: {
			getlist() {
				// this.fileList1()
				console.log(this.fileList1)
				var list = []
				this.fileList1.forEach((type) => {
					list.push(type.url)
				});
				this.$emit('getdata', list)
			},
			clear() {
				this[`fileList${event.name}`] = []
				this.getlist()
			},
			// 删除图片
			deletePic(event) {
				this[`fileList${event.name}`].splice(event.index, 1)
				this.imgList.splice(event.index, 1)
				this.getlist()
			},
			// 新增图片
			async afterRead(event) {
				// 当设置 mutiple 为 true 时, file 为数组格式，否则为对象格式
				let lists = [].concat(event.file)
				let fileListLen = this[`fileList${event.name}`].length
				lists.map((item) => {
					this[`fileList${event.name}`].push({
						...item,
						status: 'success',
						message: '上传中'
					})
					// this[`fileList${event.name}`].push({
					// 	...item,
					// 	status: 'uploading',
					// 	message: '上传中'
					// })
				})
				for (let i = 0; i < lists.length; i++) {
					const result = await this.uploadFilePromise(lists[i].thumb)
					console.log(result)
					let item = this[`fileList${event.name}`][fileListLen]
					this[`fileList${event.name}`].splice(fileListLen, 1, Object.assign(item, {
						status: 'success',
						message: '',
						url: result
					}))
					fileListLen++
				}
			},
			uploadFilePromise(url) {
				var that = this;
				return new Promise((resolve, reject) => {
					if (uni.getStorageSync('token')) {
						that.imgToBase64(url).then(base64 => {
							// console.log("[转换成base64]", base64)
							var base64r = base64.replace('data:image/png;base64,', '')
							UpLoadImg({
								Suffix: '.' + getSuffix(url),
								ImgData: base64r,
							}, {
								custom: {
									auth: true
								}
							}).then(res => {
								if (res.Code == 200) {
									resolve(res.Data.FileName)
									that.getlist()
								}
							}).catch(err => {

							})
						})
					}
				})
			},
			imgToBase64(data) {
				return new Promise((resolve, reject) => {
					pathToBase64(data).then(base64 => {
						resolve(base64)
					}).catch(error => {
						console.error(error)
						reject(error)
					})
				})
			},
		}
	}
</script>

<style>
</style>