Ios Amazon S3 Cognito-从图像选取器上载图像-Swift 3

我已经成功地将静态图像上传到AWS服务器。当我将它与imagepicker结合使用时，我面临一个wierd问题，因为同一个图像被上传到AWS，尽管我对它们进行了不同的选择和命名。代码如下：

internal func imagePickerController(_ picker: UIImagePickerController,
 didFinishPickingMediaWithInfo info: [String : Any])
 {
    let image = info[UIImagePickerControllerOriginalImage] as! UIImage
    var imageUrl          = info[UIImagePickerControllerReferenceURL] as? NSURL
    let imageName         = imageUrl?.lastPathComponent
    let documentDirectory = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!
    let photoURL          = NSURL(fileURLWithPath: documentDirectory)
    let localPath         = photoURL.appendingPathComponent(imageName!)

    print("image name : \(imageName)")

    if !FileManager.default.fileExists(atPath: localPath!.path) {
        do {
            try UIImageJPEGRepresentation(image, 1.0)?.write(to: localPath!)
            print("file saved")
            //let imageData = NSData(contentsOf: localPath!)
            //let finalURL = localPath!

            //this is in swift 2; above 2 lines are its equivalent in swift3. I think the problem lies here
            //let imageData = NSData(contentsOfFile: localPath)!
            //imageURL = NSURL(fileURLWithPath: localPath)

        }catch {
            print("error saving file")
        }
    }
    else {
        print("file already exists")
    }

    self.dismiss(animated: true, completion: nil)

    let credentialProvider = AWSCognitoCredentialsProvider(regionType: .USEast1, identityPoolId: "identity pool id")
    let configuration = AWSServiceConfiguration(region: .APSoutheast1, credentialsProvider: credentialProvider)
    AWSServiceManager.default().defaultServiceConfiguration = configuration

    //these are the static values I used that worked perfectly fine with separate images
    //let localFileName = "Alerts_bg"
    //let ext = "png"
    //let remoteName = localFileName + "." + ext
    //let imageURL = Bundle.main.url(forResource: localFileName, withExtension: ext)!

    let transferManager = AWSS3TransferManager.default()

    let uploadRequest = AWSS3TransferManagerUploadRequest()!
    uploadRequest.bucket = "bucket"
    let imageAWSName = "ios_" + NSUUID().uuidString + ".jpg"
    uploadRequest.key = imageAWSName
    uploadRequest.body = localPath! as URL
    uploadRequest.contentType = "image/jpg"

    print("req123 : \(uploadRequest)")

    uploadRequest.uploadProgress = { (bytesSent, totalBytesSent, totalBytesExpectedToSend) -> Void in
        DispatchQueue.main.async(execute: {
            //self.amountUploaded = totalBytesSent // To show the updating data status in label.
            //self.fileSize = totalBytesExpectedToSend
            print("progress : \(totalBytesSent)/\(totalBytesExpectedToSend)")
        })
    }

    transferManager.upload(uploadRequest).continueWith(executor: AWSExecutor.mainThread(), block: { (task:AWSTask<AnyObject>) -> Any? in
        if let error = task.error {
            print("Upload failed with error: (\(error.localizedDescription))")
        }
        if task.result != nil {

            let s3URL = URL(string: "https://s3-ap-southeast-1.amazonaws.com/bucket/\(imageAWSName)")!
            print("Uploaded to:\(s3URL)")
        }
        return nil
    })

 dismiss(animated:true, completion: nil) //5
 }

内部函数imagePickerController（\uPicker:UIImagePickerController，
didFinishPickingMediaWithInfo:[字符串：任意]）
{
将image=info[UIImagePickerControllerOriginalImage]设为！UIImage
var imageUrl=info[UIImagePickerControllerReferenceURL]作为？NSURL
让imageName=imageUrl？.lastPathComponent
让documentDirectory=NSSearchPathForDirectoriesInDomains（.documentDirectory、.userDomainMask，true）。首先！
让photoURL=NSURL（fileURLWithPath:documentDirectory）
让localPath=photoURL.appendingPathComponent（imageName！）
打印（“图像名称：\（图像名称）”）
如果！FileManager.default.fileExists（atPath:localPath！.path）{
做{
尝试UIImageJPEGRepresentation（图像，1.0）？。写入（到：localPath！）
打印（“文件已保存”）
//让imageData=NSData（contentsOf:localPath！）
//让finalURL=localPath！
//这是在swift 2中；以上两行在swift 3中是等效的。我认为问题就在这里
//让imageData=NSData（contentsOfFile:localPath）！
//imageURL=NSURL（fileURLWithPath:localPath）
}抓住{
打印（“保存文件时出错”）
}
}
否则{
打印（“文件已存在”）
}
self.disclose（动画：true，完成：nil）
let credentialProvider=AWSCognitoCredentialsProvider（区域类型：.USEast1，identityPoolId:“标识池id”）
let configuration=AWSServiceConfiguration（区域：.APSoutheast1，credentialProvider:credentialProvider）
AWSServiceManager.default（）.defaultServiceConfiguration=配置
//这些是我使用的静态值，它们对单独的图像非常有效
//让localFileName=“警报”\u bg
//让ext=“png”
//让remoteName=localFileName+“+ext
//让imageURL=Bundle.main.url（forResource:localFileName，扩展名：ext）！
让transferManager=AWSS3TransferManager.default（）
让uploadRequest=AWSS3TransferManagerPloadRequest（）！
uploadRequest.bucket=“bucket”
让imageAWSName=“ios_“+nsuid（）.uuiString+”.jpg
uploadRequest.key=imageAWSName
uploadRequest.body=localPath！作为URL
uploadRequest.contentType=“image/jpg”
打印（“请求123:\（上传请求）”）
uploadRequest.uploadProgress={（bytesSent，totalBytesSent，totalBytesExpectedToSend）->在中无效
DispatchQueue.main.async（执行：{
//self.amountupload=totalBytesSent//显示标签中的更新数据状态。
//self.fileSize=totalBytesExpectedToSend
打印（“进度：\（totalBytesSent）/\（totalBytesExpectedToSend）”）
})
}
transferManager.upload（uploadRequest）.continueWith（执行器：AWSExecutor.mainThread（），block:{（任务：AWSTask和），但这些都在早期版本的swift中，我无法在swift 3中转换它，也无法将imagepicker与AWS正确组合。
请有人帮忙。
实际上，当你这样做时：

let photoURL          = NSURL(fileURLWithPath: documentDirectory)
let localPath         = photoURL.appendingPathComponent(imageName!)

您正在将localPath创建为
URL


因此，当您进行以下操作时：

let imageURL = NSURL(fileURLWithPath: localPath)

它给出了错误，因为localPath是
URL
而不是
String
。
在这里，您可以直接使用as：

let imageURL = localPath!

我找到了解决问题的方法：

let imageAWSName = "ios_" + NSUUID().uuidString + ".jpg"

    let image = info[UIImagePickerControllerOriginalImage] as! UIImage
    let documentDirectory = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!
    let photoURL          = NSURL(fileURLWithPath: documentDirectory)
    let localPath         = photoURL.appendingPathComponent(imageAWSName)

    if !FileManager.default.fileExists(atPath: localPath!.path) {
        do {
            try UIImageJPEGRepresentation(image, 1.0)?.write(to: localPath!)
            print("file saved")
        }catch {
            print("error saving file")
        }
    }
    else {
        print("file already exists")
    }

    let credentialProvider = AWSCognitoCredentialsProvider(regionType: .USEast1, identityPoolId: “your identity pool id”)
    let configuration = AWSServiceConfiguration(region: .APSoutheast1, credentialsProvider: credentialProvider)
    AWSServiceManager.default().defaultServiceConfiguration = configuration

    let transferManager = AWSS3TransferManager.default()

    let uploadRequest = AWSS3TransferManagerUploadRequest()!
    let yourBucketName = “your bucket name”
    uploadRequest.bucket = yourBucketName

    uploadRequest.key = imageAWSName
    uploadRequest.body = localPath! as URL
    uploadRequest.contentType = "image/jpg"

    uploadRequest.uploadProgress = { (bytesSent, totalBytesSent, totalBytesExpectedToSend) -> Void in
        DispatchQueue.main.async(execute: {
            //self.amountUploaded = totalBytesSent // To show the updating data status in label.
            //self.fileSize = totalBytesExpectedToSend
            print("progress : \(totalBytesSent)/\(totalBytesExpectedToSend)")
        })
    }

    transferManager.upload(uploadRequest).continueWith(executor: AWSExecutor.mainThread(), block: { (task:AWSTask<AnyObject>) -> Any? in
        if let error = task.error {
            print("Upload failed with error: (\(error.localizedDescription))")
        }
        if task.result != nil {

            let s3URL = URL(string: "https://s3-ap-southeast-1.amazonaws.com/\(yourBucketName)/\(imageAWSName)")!
            print("Uploaded to:\(s3URL)")
        }
        return nil
    })

    self.picker.dismiss(animated: true, completion: nil)

让imageAWSName=“ios_“+nsuid（）.uuidString+”.jpg
将image=info[UIImagePickerControllerOriginalImage]设为！UIImage
让documentDirectory=NSSearchPathForDirectoriesInDomains（.documentDirectory、.userDomainMask，true）。首先！
让photoURL=NSURL（fileURLWithPath:documentDirectory）
让localPath=photoURL.appendingPathComponent（imageAWSName）
如果！FileManager.default.fileExists（atPath:localPath！.path）{
做{
尝试UIImageJPEGRepresentation（图像，1.0）？。写入（到：localPath！）
打印（“文件已保存”）
}抓住{
打印（“保存文件时出错”）
}
}
否则{
打印（“文件已存在”）
}
让credentialProvider=AWSCognitoCredentialsProvider（regionType:.USEast1，identityPoolId:“您的身份池id”）
let configuration=AWSServiceConfiguration（区域：.APSoutheast1，credentialProvider:credentialProvider）
AWSServiceManager.default（）.defaultServiceConfiguration=配置
让transferManager=AWSS3TransferManager.default（）
让uploadRequest=AWSS3TransferManagerPloadRequest（）！
让您的bucket name=“您的bucket name”
uploadRequest.bucket=yourBucketName
uploadRequest.key=imageAWSName
uploadRequest.body=localPath！作为URL
uploadRequest.contentType=“image/jpg”
uploadRequest.uploadProgress={（bytesSent，totalBytesSent，totalBytesExpectedToSend）->在中无效
DispatchQueue.main.async（执行：{
//self.amountupload=totalBytesSent//显示标签中的更新数据状态。
//self.fileSize=totalBytesExpectedToSend
打印（“进度：\（totalBytesSent）/\（totalBytesExpectedToSend）”）
})
}
transferManager.upload（uploadRequest）.continueWith（执行器：AWSExecutor.mainThread（），块：{（任务：AWSTask）->中的任何
如果let error=task.error{
打印（“上载失败，错误：（\（error.localizedDescription）））
}
如果task.result！=nil{
让s3URL=URL（字符串：https://s3-ap-southeast-1.amazonaws.com/\（你的BucketName）/\（imageAWSName）！
打印（“上载到：\（s3URL）”）
}
归零
})
self.picker.disclose（动画：true，完成：nil）

确保localPath中使用的imageAWSName始终与我所做的不同。这是最重要的，否则AWS将多次保存同一图像