uniapp的uni.uploader上传api在安卓端正常，ios不正常？

Question

uniapp的uni.uploader上传api在安卓端正常，ios不正常？

部分代码

var header = {
                        "sign": signMD5,
                        "Authorization": token,
                        "nonce": nocer,
                        "deviceId": systemInfo.deviceId,
                        "deviceName": systemInfo.model,
                        "deviceType": "2",
                        "appVersion": "1.0.0",
                        "timestamp": timestamp, // 时间：年月日时分秒
                        // "Content-Type": "multipart/form-data",
                        // "Content-Type": "application/json;charset=UTF-8"
                    }
                    // let addressInfo = uni.getStorageSync('locationInfo')
                    // let addressLoaction = addressInfo.address.province + addressInfo.address.city + addressInfo.address
                    //     .district + addressInfo.address.street + addressInfo.address.streetNum

                    let uploadUrl = ""
                    if (this.openWatermark) {
                        uploadUrl = config.baseUrl + 'upload4base64'
                    } else {
                        uploadUrl = config.baseUrl + 'common/upload'
                    }

                    return new Promise((resolve, reject) => {
                        console.log(lists[i].thumb, 'lists');
                        let a = uni.uploadFile({
                            url: uploadUrl,
                            filePath: lists[i].thumb,
                            name: 'file',
                            formData: {
                                user: 'test',
                                address: '123',
                                lng: 112.23,
                                lat: 11.22,
                                // address: addressLoaction,
                                // lng: addressInfo.longitude,
                                // lat: addressInfo.latitude,
                                realname: this.userInfo.trueName,
                                file: lists[i].thumb
                            },

                            header: header,
                            success: (res => {
                                console.log(res);
                                setTimeout(() => {
                                    var data = JSON.parse(res.data)
                                    let item = this[`fileList${event.name}`][
                                        fileListLen
                                    ]
                                    this[`fileList${event.name}`].splice(fileListLen,
                                        1,
                                        Object.assign(item, {
                                            status: 'success',
                                            message: '',
                                            url: data.url
                                        }))
                                    fileListLen++
                                    this.dataForm.checkImgs = this.fileList3.map(
                                        item =>
                                        item.url).join(',')
                                    resolve(data)
                                    this.uploadFileLoading = false
                                }, 1000)
                            })
                        });
                    })

formData的参数在安卓上调用时，后端可以全部接收，而在ios上后端接收到的file参数为null
求大佬解答哦？