This Swift code example will demonstrate how to upload image to Amazon AWS S3 Bucket.

The code example below will cover:

• Set up AWS S3 Bucket policy,
• Configure AWSCognitoCredentialsProvider,
• Set up AWSS3TransferManagerUploadRequest
• User AWSS3TransferManager to upload image
• Read uploaded image from Amazon S3 Bucket
• Display uploaded image as a subview

AWS Bucket Policy

{
 "Version": "2008-10-17",
 "Statement": [
  {
   "Sid": "AddPerm",
   "Effect": "Allow",
   "Principal": "*",
   "Action": "s3:GetObject",
   "Resource": "arn:aws:s3:::learn-swift/*"
  }
 ]
}

 

Image Upload to Amazon AWS S3 Bucket. Complete Code Example in Swift.

import UIKit
import AWSCore
import AWSS3

class ViewController: UIViewController {
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        
        
        // Configure AWS Cognito Credentials
        let myIdentityPoolId = ""
        
        let credentialsProvider:AWSCognitoCredentialsProvider = AWSCognitoCredentialsProvider(regionType:AWSRegionType.usEast1, identityPoolId: myIdentityPoolId)
        
        let configuration = AWSServiceConfiguration(region:AWSRegionType.usEast1, credentialsProvider:credentialsProvider)
        
        AWSServiceManager.default().defaultServiceConfiguration = configuration
        
        // Set up AWS Transfer Manager Request
        let S3BucketName = "learn-swift"
        let ext = "jpeg"
        let localFileName = "kungfu2" // local file name here
        let remoteName = localFileName + "." + ext
        //let fileName = NSUUID().UUIDString + "." + ext
        let imageURL = Bundle.main.url(forResource: localFileName, withExtension: ext)!
        
        let uploadRequest = AWSS3TransferManagerUploadRequest()
        uploadRequest?.body = imageURL
        uploadRequest?.key = remoteName
        uploadRequest?.bucket = S3BucketName
        uploadRequest?.contentType = "image/" + ext
        
        let transferManager = AWSS3TransferManager.default()
        
        // Perform file upload
        transferManager?.upload(uploadRequest).continue({ (task:AWSTask) -> Any? in
    
            if let error = task.error {
                print("Upload failed with error: (\(error.localizedDescription))")
            }
            
            if let exception = task.exception {
                print("Upload failed with exception (\(exception))")
            }
            
            if task.result != nil {
                
                let s3URL = URL(string: "https://s3.amazonaws.com/\(S3BucketName)/\(uploadRequest!.key!)")!
                print("Uploaded to:\n\(s3URL)")
                
                // Read uploaded image and display in a view
                let imageData = NSData(contentsOf: s3URL as URL)
                
                if let downloadedImageData = imageData
                {
                    DispatchQueue.main.async {
                        let image = UIImage(data: downloadedImageData as Data)
                        let myImageView:UIImageView = UIImageView()
                        myImageView.frame = CGRect(x:10, y:100, width:25, height:25)
                        myImageView.image = image
                        myImageView.contentMode = UIViewContentMode.scaleAspectFit
                        
                        self.view.addSubview(myImageView)
                    }
                }
            }
            else {
                print("Unexpected empty result.")
            }
            return nil
        })
        
    }
}

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