顯示使用Swift 3和Amazon SDK將圖像上傳到Amazon S3的上傳進度

Question

我能夠成功將圖像上傳到Amazon S3，但似乎無法弄清楚如何顯示它的進度。

我目前正在上傳像這樣。

import UIKit 
import MapKit 
import CoreData 
import AWSCore 
import AWSCognito 
import AWSS3 
import MobileCoreServices 
import AWSMobileAnalytics 

在我的上傳按鈕

我有以下代碼...

let myIdentityPoolId = "us-west-2:dca2beb4-9a67-etc....etc..." 
       let credentialsProvider:AWSCognitoCredentialsProvider = AWSCognitoCredentialsProvider(regionType: AWSRegionType.usWest2, identityPoolId: myIdentityPoolId) 
       let configuration = AWSServiceConfiguration(region: AWSRegionType.usWest2, credentialsProvider: credentialsProvider) 
       AWSServiceManager.default().defaultServiceConfiguration = configuration 

self.uploadImage(filename) 

這是uploadImage功能...

func uploadImage(filename:String){ 
     print("AWS Upload Image Attempt...") 
     //defining bucket and upload file name 
     let S3BucketName: String = "distribution-tech-mobile-live" 
     let filepath = "\(AppDelegate.appDelegate.applicationDocumentsDirectory())/\(filename)" 
     let imageURL = URL(fileURLWithPath: filepath) 
     let S3UploadKeyName = filename //TODO: Change this later 

     let uploadRequest = AWSS3TransferManagerUploadRequest() 
     uploadRequest?.bucket = S3BucketName 
     uploadRequest?.key = filename 
     uploadRequest?.contentType = "image/jpeg" 
     uploadRequest?.body = imageURL 
     uploadRequest?.serverSideEncryption = AWSS3ServerSideEncryption.awsKms 
     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("\(totalBytesSent)/\(totalBytesExpectedToSend)") 
      }) 
     } 

     self.uploadCompletionHandler = { (task, error) -> Void in 
      DispatchQueue.main.async(execute: { 
       if ((error) != nil){ 
        print("Failed with error") 
        print("Error: \(error!)"); 
       } 
       else{ 
        print("Sucess") 
       } 
      }) 
     } 

     let transferUtility = AWSS3TransferUtility.default() 
     let expression = AWSS3TransferUtilityUploadExpression() 

     transferUtility.uploadFile(imageURL, bucket: S3BucketName, key: S3UploadKeyName, contentType: "image/jpeg", expression: expression, completionHander: uploadCompletionHandler).continue({ (task) -> AnyObject! in 
      if let error = task.error { 
       print("Error: \(error.localizedDescription)") 
      } 
      if let exception = task.exception { 
       print("Exception: \(exception.description)") 
      } 
      if let _ = task.result { 
       print("Upload Starting!") 
      } 

      return nil; 
     }) 

    } 

我得到了圖片上傳進度代碼另一個線程，但有解決方案似乎不工作，或者我誤解它。

Upload image AWS S3 bucket in swift和此線程（Swift - AWS S3 Upload Image from Photo Library and download it）。他們都有兩種不同的方式來做到這一點，最後一個環節我也無法工作。

我不知道我在做什麼錯。

Answer 1

好吧，我找到了解決我的問題，顯然我只是沒有足夠的經歷。

這是我的新修訂uploadImage功能

func uploadImage(filename:String){ 
     print("AWS Upload Image Attempt...") 
     //defining bucket and upload file name 
     let S3BucketName: String = "distribution-tech-mobile-live" 
     let filepath = "\(AppDelegate.appDelegate.applicationDocumentsDirectory())/\(filename)" 
     let imageURL = URL(fileURLWithPath: filepath) 
     let S3UploadKeyName = filename //TODO: Change this later 

     let uploadRequest = AWSS3TransferManagerUploadRequest() 
     uploadRequest?.bucket = S3BucketName 
     uploadRequest?.key = S3UploadKeyName 
     uploadRequest?.contentType = "image/jpeg" 
     uploadRequest?.body = imageURL 
     uploadRequest?.serverSideEncryption = AWSS3ServerSideEncryption.awsKms 
     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("\(totalBytesSent)/\(totalBytesExpectedToSend)") 
      }) 
     } 

     let transferManager = AWSS3TransferManager.default() 
     transferManager?.upload(uploadRequest).continue(with: AWSExecutor.mainThread(), withSuccessBlock: { (taskk: AWSTask) -> Any? in 
      if taskk.error != nil { 
       // Error. 
       print("error") 
      } else { 
       // Do something with your result. 
       print("something with result when its done") 
      } 
      return nil 
     }) 

    } 

這樣做時，結果做了，並在上傳進度點，使很多更有意義。