项目中用到了阿里云对象存储，就封装了四种上传方式，按数量分为单图和多图上传，上传方式分为同步和异步上传。

// 异步上传
    func uploadImageAsync(image: UIImage,
                           uploadProgress: @escaping OSSNetworkingUploadProgressBlock,
                           uploadBlock: @escaping uploadImageBlock,
                           uploadFail: @escaping uploadImageFail) {
        let imageName = imageNameWithCurrentTimescamp()
        let put = OSSPutObjectRequest()
        put.bucketName = bucketName
        put.objectKey = imageName
        guard let data = image.wcSessionCompress()?.jpegData(compressionQuality: 1) else { return }
        put.uploadingData = data
        put.uploadProgress = {bytesSent, totalByteSent, totalBytesExpectedToSend in
            uploadProgress(bytesSent, totalByteSent, totalBytesExpectedToSend)
        }
        put.contentType = "image/jpeg"
        let putTask = client.putObject(put)
        putTask.continue({ (task) -> Any? in
            do {
                try self.client.doesObjectExist(inBucket: ThridPartyMarcos.AliOSS_BucketName.rawValue, objectKey: imageName)
                let url = "https://\(self.startPoint)/\(imageName)"
                uploadBlock(url)
            } catch {
                kLog(message: "上传失败")
                if let error = putTask.error {
                    uploadFail(error)
                }
            }
            return nil
        }, cancellationToken: nil)
    }
    
    
    // 同步上传
    func uploadImageSync(_ image: UIImage,
                          uploadProgress: @escaping OSSNetworkingUploadProgressBlock,
                          uploadBlock: @escaping uploadImageBlock,
                          uploadFail: @escaping uploadImageFail) {
        let imageName = imageNameWithCurrentTimescamp()
        let put = OSSPutObjectRequest()
        put.bucketName = bucketName
        put.objectKey = imageName
        guard let data = image.wcSessionCompress()?.jpegData(compressionQuality: 1) else { return }
        put.uploadingData = data
        put.uploadProgress = {bytesSent, totalByteSent, totalBytesExpectedToSend in
            uploadProgress(bytesSent, totalByteSent, totalBytesExpectedToSend)
        }
        put.contentType = "image/jpeg"
        let putTask = client.putObject(put)
        putTask.waitUntilFinished()
        putTask.continue({ (task) -> Any? in
            do {
                try self.client.doesObjectExist(inBucket: self.bucketName, objectKey: imageName)
                let url = "https://\(self.startPoint)/\(imageName)"
                uploadBlock(url)
            } catch {
                kLog(message: "上传失败")
                if let error = putTask.error {
                    uploadFail(error)
                }
            }
            return nil
        }, cancellationToken: nil)
    }
    
    /// 同步上传多张图片
    func uploadImagesSync(_ images: [UIImage],
                          uploadProgress: @escaping OSSNetworkingUploadProgressBlock,
                          uploadBlock: @escaping uploadImagesBlock,
                          uploadFail: @escaping uploadImageFail) {
        var imageUrls: [String] = []
        for image in images {
            let imageName = imageNameWithCurrentTimescamp()
            let put = OSSPutObjectRequest()
            put.bucketName = bucketName
            put.objectKey = imageName
            guard let data = image.wcSessionCompress()?.jpegData(compressionQuality: 1) else { return }
            put.uploadingData = data
            put.uploadProgress = {bytesSent, totalByteSent, totalBytesExpectedToSend in
                uploadProgress(bytesSent, totalByteSent, totalBytesExpectedToSend)
            }
            put.contentType = "image/jpeg"
            let putTask = client.putObject(put)
            putTask.waitUntilFinished()
            putTask.continue({ (task) -> Any? in
                do {
                    try self.client.doesObjectExist(inBucket: self.bucketName, objectKey: imageName)
                    let url = "https://\(self.startPoint)/\(imageName)"
                    imageUrls.append(url)
                    /// 为什么加 imageUrls?.count == images.count ？
                    /// 只有所有图片都上传成功才视作上传任务完成
                    if image == images.last && imageUrls.count == images.count {
                        //上传最后一张图片结束
                        uploadBlock(imageUrls)
                    }
                } catch {
                    kLog(message: "上传失败")
                    if let error = putTask.error {
                        uploadFail(error)
                    }
                }
                return nil
            }, cancellationToken: nil)
        }
    }
    
    /// 异步上传多张图片
    func uploadAsyncImages(_ images: [UIImage],
                           uploadProgress: @escaping OSSNetworkingUploadProgressBlock,
                           uploadBlock: @escaping uploadImagesBlock,
                           uploadFail: @escaping uploadImageFail) {
        
        let group = DispatchGroup()
        var imageModelArray: [uploadImageAsyncModel] = []
        
        for index in 0..<images.count {
            let image = images[index]
            var model = uploadImageAsyncModel(index: index, url: "")
            let imageName = imageNameWithCurrentTimescamp()
            let put = OSSPutObjectRequest()
            put.bucketName = bucketName
            put.objectKey = imageName
            guard let data = image.wcSessionCompress()?.jpegData(compressionQuality: 1) else { return }
            put.uploadingData = data
            put.uploadProgress = {bytesSent, totalByteSent, totalBytesExpectedToSend in
                uploadProgress(bytesSent, totalByteSent, totalBytesExpectedToSend)
            }
            put.contentType = "image/jpeg"
            let putTask = client.putObject(put)
            group.enter()
            putTask.continue({ (task) -> Any? in
                do {
                    try self.client.doesObjectExist(inBucket: self.bucketName, objectKey: imageName)
                    let url = "https://\(self.startPoint)/\(imageName)"
                    model.url = url
                    imageModelArray.append(model)
                    group.leave()
                } catch {
                    if let error = putTask.error {
                        uploadFail(error)
                    }
                    imageModelArray.append(model)
                    group.leave()
                }
                return nil
            }, cancellationToken: nil)
        }
        group.notify(queue: DispatchQueue.main) {
            //图片上传结束，图片排序
            if imageModelArray.count != images.count {
                return
            } else {
                let sortedArray = imageModelArray.sorted {
                    return $0.index < $1.index
                }
                var imageUrls: [String] = []
                for model in sortedArray {
                    if model.url.isEmpty {
                        break
                    } else {
                        imageUrls.append(model.url)
                    }
                }
                if imageUrls.count == images.count {
                    //返回图片数组url
                    uploadBlock(imageUrls)
                }
            }
        }
    }
//以时间戳命名图片名称
private func imageNameWithCurrentTimescamp() -> String {
        let timeInterval: TimeInterval = Date().timeIntervalSince1970
        let millisecond = CLongLong(round(timeInterval*1000))
        var subFolder: String = ""
        switch imageFolderType {
        case .daily:
            subFolder = "ios/daily"
        case .post:
            subFolder = "ios/post"
        default:
            subFolder = "ios/other"
        }
        let imageName = "\(subFolder)/\(millisecond).jpeg"
        return imageName
    }