How can I upload an image from my ios app to my bucket stored on aws s3 and do all of that in Swift?

Question

There are lots and lots examples of that written in obj C, but I'm looking for a Swift solution. So far all I could find is this one https://github.com/awslabs/aws-sdk-ios-samples/tree/master/S3TransferManager-Sample/Swift but it's not that clear for me.

I already configured the s3 on aws webpage, I also created and filled file Constans.swift:

import AWSS3
import Foundation

let CognitoRegionType = AWSRegionType.XXXXX  
let DefaultServiceRegionType = AWSRegionType.XXXXX 
let CognitoIdentityPoolId = "MyCognitoIdentityPoolId"
let S3BucketName = "MyS3BucketName"

I also added the following lines to AppDelegate.swift:

let credentialsProvider = AWSCognitoCredentialsProvider(regionType: CognitoRegionType, identityPoolId: CognitoIdentityPoolId)
let configuration = AWSServiceConfiguration(region: DefaultServiceRegionType, credentialsProvider: credentialsProvider)
AWSServiceManager.defaultServiceManager().defaultServiceConfiguration = configuration

I also have a class in Swift with a button and an image view controller and so far when I click the button I can take the photo from gallery or camera and it shows on the image view. This is my code responsible for that:

@IBOutlet weak var imageView: UIImageView!

@IBAction func captureImage(sender: AnyObject) {

    let imageFromSource = UIImagePickerController()
    imageFromSource.delegate = self
    imageFromSource.allowsEditing = false

    if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera){

        imageFromSource.sourceType = UIImagePickerControllerSourceType.Camera

    }
    else{

        imageFromSource.sourceType = UIImagePickerControllerSourceType.PhotoLibrary

    }

    self.presentViewController(imageFromSource, animated: true, completion: nil)

}

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {

    imageView.image = image
    self.dismissViewControllerAnimated(true, completion: {})

}

Now all I want is to add a new button that will be responsible for uploading this photo to my s3 bucket, something like in this tutorial: https://www.youtube.com/watch?v=WZ54fH8AFUk (unfortunately it's in objective c here, I would be so grateful if you could help me with a swift version...). Thanks!

====EDIT

I've been following a tutorial posted by @the_pantless_coder (this one https://www.codementor.io/tips/5748713276/how-to-upload-images-to-aws-s3-in-swift ) and I've decided to modify my existing method imagePickerController, so far it looks like this:

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {

        imageView.image = image
        self.dismissViewControllerAnimated(true, completion: {})

        let credentialsProvider = AWSCognitoCredentialsProvider(regionType:CognitoRegionType,
            identityPoolId:CognitoIdentityPoolId)
        let configuration = AWSServiceConfiguration(region:CognitoRegionType, credentialsProvider:credentialsProvider)
        AWSServiceManager.defaultServiceManager().defaultServiceConfiguration = configuration

        let ext = "png"
        let imageURL = NSBundle.mainBundle().URLForResource("image", withExtension: ext)!

        let uploadRequest = AWSS3TransferManagerUploadRequest()
        uploadRequest.body = imageURL
        uploadRequest.key = NSProcessInfo.processInfo().globallyUniqueString + "." + ext
        uploadRequest.bucket = S3BucketName
        uploadRequest.contentType = "image/" + ext
    }

but I have a problem with this line:

let imageURL = NSBundle.mainBundle().URLForResource("image", withExtension: ext)!

how can I get the imageURL when I only have a imageView.image = image here?

Answer 1

Please make sure you have a bridging header in place in place where you can import the appropriate AWS headers. There is an example located here on GitHub.

Doing this should make the S3 methods available.

-Rohan