CODEWITHSUNDEEP
iosswift3uiimageviewxcode8uiimagepickercontroller
Vinny
Vinny

Reputation: 75

Swift 3.0: How to save a user's image in the app from an imagePicker

I am trying to have a user choose an image from their gallery or camera, then upload it to the app. This works, but the only problem is that it doesn't save it in the app. As soon as the user closes the app, the image that the user chose disappears. I also do not have any save function because i don't know how to implement one.

I am using Xcode 8.3.2 in Swift 3.0. Here is the code below:

    import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet weak var imageView: UIImageView!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    @IBAction func chooseImage(_ sender: Any) {

        let imagePickerController = UIImagePickerController()
        imagePickerController.delegate = self

        let actionSheet = UIAlertController(title: "Photo Source", message: "Choose a source", preferredStyle: .actionSheet)

        actionSheet.addAction(UIAlertAction(title: "Camera", style: .default, handler: { (action:UIAlertAction) in

            if UIImagePickerController.isSourceTypeAvailable(.camera) {
                imagePickerController.sourceType = .camera
                self.present(imagePickerController, animated: true, completion: nil)
            }else{
                print("Camera not available")
            }


        }))

        actionSheet.addAction(UIAlertAction(title: "Photo Library", style: .default, handler: { (action:UIAlertAction) in
            imagePickerController.sourceType = .photoLibrary
            self.present(imagePickerController, animated: true, completion: nil)
        }))

        actionSheet.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))

        self.present(actionSheet, animated: true, completion: nil)


    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        let image = info[UIImagePickerControllerOriginalImage] as! UIImage

        imageView.image = image

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

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        picker.dismiss(animated: true, completion: nil)
    }





    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

Upvotes: 0

Views: 1632

Answers (2)

cole
cole

Reputation: 3367

Remember to save image you need to store image as NSData

      // Code to store image
     let defaults = UserDefaults.standard

   //  To save as data:

  //   From StoryBoard, if you want to save "image" data on the imageView of 
  //   MainStoryBoard, following codes will work.

     let image = UIImagePNGRepresentation(imageView.image!) as NSData? 
    defaults.set(image, forKey: "test")  // saving image into userdefault


     // for retrieving the image 

   if (UserDefaults.standard.object(forKey: "test") as? NSData) != nil {
        let photo = UserDefaults.standard.object(forKey: "test") as! NSData
        img2.image = UIImage(data: photo as Data) // img2 set your imageview on which you want photo to appear

        // Now you can set img2.image
    }

Edited

How to use in your code 

func imagePickerController(_ picker: UIImagePickerController, 
    didFinishPickingMediaWithInfo info: [String : Any]) {
     let defaults = UserDefaults.standard
     let image = info[UIImagePickerControllerOriginalImage] as! UIImage

     imageView.image = image
    let saveImage = UIImagePNGRepresentation(image!) as NSData? 
    defaults.set(saveImage, forKey: "test")  // saving image into userdefault


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

And in your view did load use retrieving method If the image exist and in nsdata format then only it will show save image. Thats it.

Upvotes: 2

Devang Tandel
Devang Tandel

Reputation: 3008

You can save image in your document directory with below function

func saveImageDocumentDirectory(tempImage:UIImage){

    let documentsDirectoryURL = try! FileManager().url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
    let fileURL = documentsDirectoryURL.appendingPathComponent("ImageName.png")
        do {
            try UIImagePNGRepresentation(tempImage)?.write(to: fileURL)
        } catch {
            print(error)
        }
}

To retrieve Image you can use 

func getImage()->URL?{

    let documentsDirectoryURL = try! FileManager().url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
     let fileURL = documentsDirectoryURL.appendingPathComponent("ImageName.png")

    if FileManager.default.fileExists(atPath: fileURL.path){
        return fileURL
    }else{
        return nil
    }
}

You can use any name you like and store image with different name to store multiple image.

Upvotes: 0

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