无法使用 AWS S3 iOS SDK 从存储桶的子文件夹下载

Question

使用 AWS S3 SDK（通过 Cocoapods）v2.8.0 但我无法从存储桶的子文件夹中下载图像。该代码适用于在存储桶的根目录中下载

    func downloadData(imageName: String, completion: @escaping (Bool) -> () ) {
        let expression = AWSS3TransferUtilityDownloadExpression()
        expression.progressBlock = {(task, progress) in DispatchQueue.main.async(execute: {
            print("Download in process: \(progress.fractionCompleted*100)% complete")
        })
        }
        var completionHandler: AWSS3TransferUtilityDownloadCompletionHandlerBlock?
        completionHandler = { (task, URL, data, error) -> Void in
            DispatchQueue.main.async(execute: {
                if let error = error?.localizedDescription {
                    print("Error in completion of download: \(error)")
                }
                print("Completion Response: \(task.response)")
                if let responseData = data {
                    if let image = UIImage.init(data: responseData) {
                        self.saveImage(imageName: imageName, image: image)
                        completion(true)
                    }
                }
                completion(false)
            })
        }
        transferUtility.downloadData(
            fromBucket: "myBucketName",
            key: "mySubFolder/" + imageName,
            expression: expression,
            completionHandler: completionHandler
            ).continueWith {
                (task) -> AnyObject? in if let error = task.error {
                    print("Error: \(error.localizedDescription)")
                }
                if let _ = task.result {
                }
                return nil;
        }
    }

我收到带有上述代码和以下错误的 404。

Error in completion of download: The operation couldn’t be completed. (com.amazonaws.AWSS3TransferUtilityErrorDomain error 2.)

Answer 1

已解决：上面的代码是正确的，但我从我的密钥中省略了文件扩展名。在根文件夹中，它似乎不太挑剔，所以会接受 "ImageName" 或 "ImageName.jpg" 但在其上添加子文件夹时不喜欢这样，只接受 "SubFolder/ImageName.jpg".

添加文件扩展名解决了问题。

无法使用 AWS S3 iOS SDK 从存储桶的子文件夹下载

Unable to download from subfolder of a bucket using AWS S3 iOS SDK

amazon-s3

ios

swift

aws-sdk