父组件
<view class="createtask">
    <view class="cttitle">场站整体照片<text>*</text></view>
    <view class="desc">从不同方位拍摄拟建充电桩整体区域图，要求不少于2张</view>
    <mp-fileupload typename="imgStationFiles" fileList="{{formdata.imgStationFiles}}" bindsendMsg="sendMsg"></mp-fileupload>


    <view class="cttitle" style="margin-top:60rpx">现场整体（航拍或手绘）</view>
    <mp-fileupload typename="imgRiskFiles" fileList="{{formdata.imgRiskFiles}}" bindsendMsg="sendMsg"></mp-fileupload>


    <view class="cttitle" style="margin-top:60rpx">现场整体补充</view>
    <mp-fileupload typename="imgAcVideoFiles" fileList="{{formdata.imgAcVideoFiles}}" bindsendMsg="sendMsg"></mp-fileupload>
</view>




子组件
<!--pages/components/fileUpload/fileUpload.wxml-->
<view class="uploaderbox">
    <van-uploader accept="media" max-count="20" multiple file-list="{{ fileList }}" bind:delete="deleteRead" bind:after-read="afterRead">
        <view class="uploader">
            <!-- <van-icon class="plus" name="plus" /> -->
            点击上传
        </view>
    </van-uploader>
</view>

// pages/components/fileUpload/fileUpload.js
const Request = require("../../utils/request"); //导入模块
var that
var successNum = 0
Component({


    /**
     * 组件的属性列表
     */
    properties: {
        fileList: {
            type: Array,
            value: [],
            observer(nv, ov, path) {
                console.log(nv);
            }
        },
        typename: {
            type: String,
            value: '',
            observer(nv, ov, path) {
                console.log(nv);
            }
        }
    },
    pageLifetimes: {
        // 组件所在页面的生命周期函数
        show: function () {
            that = this
        },
        hide: function () {},
        resize: function () {},
    },
    /**
     * 组件的初始数据
     */
    data: {
        // fileList: []
    },


    /**
     * 组件的方法列表
     */
    methods: {
        afterRead(event) {
            const {
                file
            } = event.detail;
            for (let i = 0; i < file.length; i++) {
                if (file[i].duration && file[i].duration < 5) {
                    wx.showToast({
                        title: '视频不能小于5秒',
                        icon: "none",
                        mask: true,
                    })
                    return
                }
            }
            console.log(that.data.fileList);
            const fileList = that.data.fileList
            //获得这次上传的图片数量，上传时避免重复上传之前传过的文件
            const thatNum = file.length
            const beforeNum = fileList.length
            const totalNum = thatNum + beforeNum
            //还没上传时将选择的图片的上传状态设置为加载
            for (let j = 0; j < thatNum; j++) {
                file[j].status = 'uploading'
                fileList.push(file[j])
            }
            that.setData({
                fileList
            })
            //上传服务器
            for (let i = beforeNum; i < totalNum; i++) {
                that.uploadImg(i, that.data.fileList[i].url, that, thatNum)
            }
        },
        uploadImg(fileListIndex, fileURL, that, thatNum) {
            //上传文件
            const filePath = fileURL // 小程序临时文件路径
            wx.uploadFile({
                url: `${Request.apiHttp}/psp/api/ifs/upload`,
                filePath: filePath,
                name: 'dhefile',
                header: {
                    'dhetoken': wx.getStorageSync("UserSessionId"),
                },
                formData: {
                    appCode: 'icc'
                },
                success(res) {
                    successNum++
                    var tem = JSON.parse(res.data)
                    // 上传完成需要更新 fileList
                    that.setData({
                        [`fileList[${fileListIndex}].url`]: tem.data.httpUrl,
                        [`fileList[${fileListIndex}].status`]: 'done',
                        [`fileList[${fileListIndex}].id`]: tem.data.id
                    })
                    console.log(that.data.typename);
                    if (successNum === thatNum) {
                        that.triggerEvent('sendMsg', {
                            fileList: that.data.fileList,
                            typename: that.data.typename
                        })
                    }
                },
                fail: function (res) {
                    console.log("file upload fail")
                },
            })
        },
        deleteRead(e) {
            let fileList_index = e.detail.index //fileList下标
            that.data.fileList.splice(fileList_index, 1)
            that.setData({
                fileList: that.data.fileList
            })
            that.triggerEvent('sendMsg', {
                fileList: that.data.fileList,
                typename: that.data.typename
            })
        },
    }
})

https://developers.weixin.qq.com/s/1wuNDBmt7iNZ 能搞个能复现的最少代码吗