图像上载不工作，iOS Swift多部分

我必须上传一张图片到服务器上，但我的行为异常

if let imgdata = UIImageJPEGRepresentation(#imageLiteral(resourceName: "vishal"), 0.2) {

        let headers: HTTPHeaders = [
            "token": authToken,
            "Content-type": "multipart/form-data"
        ]

        Alamofire.upload(multipartFormData: { (multipartFormData) in
            multipartFormData.append(imgdata, withName: "image", fileName: "image.png", mimeType: "image/png")
        }, usingThreshold: UInt64.init(), to: url, method: .patch, headers: headers) { (result) in
            switch result{
            case .success(let upload, _, _):
                upload.responseJSON { response in
                    print("Succesfully uploaded")
                    if let _ = response.error{
                        return
                    }
                    if let value = response.result.value {
                        let json = JSON(value)
                        print(json)
                    }
                }
            case .failure(let error):
                print("Error in upload: \(error.localizedDescription)")
            }
        }
    }

在一个新项目中，该代码运行良好，并将映像上载到服务器，但在我的旧项目中，对于相同的代码，api调用成功，但映像未上载

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请帮助

方法类型是补丁，它将被放置或发布。在新的xcode项目中，精确的代码可以正常工作