Swift - Uiimagepickercontroller - How to Use It

Swift - UIImagePickerController - how to use it?

You're grabbing a UIImage named UIImagePickerControllerOriginalImage and there exists no such image. You're meant to grab the UIImage with the key UIImagePickerControllerOriginalImage from the editingInfo dictionary:

let tempImage = editingInfo[UIImagePickerControllerOriginalImage] as! UIImage

How to make UIImagePickerController for camera and photo library at the same time in swift

Import UIImagePickerControllerDelegate and create a variable to assign UIImagePickerController
var imagePicker = UIImagePickerController() and set imagePicker.delegate = self.

Create an action sheet to display options for 'Camera' and 'Photo library'.

On your button click action:

@IBAction func buttonOnClick(_ sender: UIButton)
{
    self.btnEdit.setTitleColor(UIColor.white, for: .normal)
    self.btnEdit.isUserInteractionEnabled = true
    
    let alert = UIAlertController(title: "Choose Image", message: nil, preferredStyle: .actionSheet)
    alert.addAction(UIAlertAction(title: "Camera", style: .default, handler: { _ in
        self.openCamera()
    }))
    
    alert.addAction(UIAlertAction(title: "Gallery", style: .default, handler: { _ in
        self.openGallary()
    }))
    
    alert.addAction(UIAlertAction.init(title: "Cancel", style: .cancel, handler: nil))
    
    /*If you want work actionsheet on ipad
    then you have to use popoverPresentationController to present the actionsheet,
    otherwise app will crash on iPad */
    switch UIDevice.current.userInterfaceIdiom {
    case .pad:
        alert.popoverPresentationController?.sourceView = sender
        alert.popoverPresentationController?.sourceRect = sender.bounds
        alert.popoverPresentationController?.permittedArrowDirections = .up
    default:
        break
    }
    
    self.present(alert, animated: true, completion: nil)
}

func openCamera()
    {
        if(UIImagePickerController .isSourceTypeAvailable(UIImagePickerController.SourceType.camera))
        {
            imagePicker.sourceType = UIImagePickerController.SourceType.camera
            imagePicker.allowsEditing = true
            self.present(imagePicker, animated: true, completion: nil)
        }
        else
        {
            let alert  = UIAlertController(title: "Warning", message: "You don't have camera", preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
            self.present(alert, animated: true, completion: nil)
        }
    }

    func openGallary()
    {
        imagePicker.sourceType = UIImagePickerController.SourceType.photoLibrary
        imagePicker.allowsEditing = true
        self.present(imagePicker, animated: true, completion: nil)
    }

Download sample project for Swift, SwiftUI

How to use UIImagePickerController in swift 4

You need to dismiss end of the function didFinishPickingMediaWithInfo

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

Swift 5 UIImagePickerController is not getting called

You seem to be missing setting delegate for the UIImagePickerController. Replace your onTapImageView with this:

@objc func onTapImageView(){
    DispatchQueue.main.async {
        self.imagePicker.allowsEditing = true
        self.imagePicker.sourceType = .photoLibrary
        self.imagePicker.delegate = self
        self.present(self.imagePicker, animated: true, completion: nil)
    }
}

Also you need the controller to confirm to UINavigationControllerDelegate so add conformance to FirstViewController like this:

class FirstViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

one UIImagePickerController for multiple UIImageViews in a single VC

You can make an enum to store the possible picker types (profile or ID picture).

enum PictureSelectionType {
    case profilePicture
    case idPicture
}
class DriverAplication: UIViewController {
    var pictureSelectionType = PictureSelectionType.profilePicture

    /// inside ViewDidLoad... 
    let profileImgTapGestur = UITapGestureRecognizer(target: self, action: #selector(DriverAplication.selectProfileImage))
    driverPImg.addGestureRecognizer(profileImgTapGestur)
        
    let passImgTapGestur = UITapGestureRecognizer(target: self, action: #selector(DriverAplication.selectIDImage))
    passImg.addGestureRecognizer(passImgTapGestur)

   
    @objc func selectProfileImage() {
        /// remember what the picker should return
        pictureSelectionType = .profilePicture
    
        let generator = UIImpactFeedbackGenerator(style: .light)
        generator.impactOccurred()

        let pickerController = UIImagePickerController()
        pickerController.delegate = self
        pickerController.allowsEditing = true
        present(pickerController, animated: true, completion: nil)
            
    }
    @objc func selectIDImage() {
        /// remember what the picker should return
        pictureSelectionType = .idPicture
    
        let generator = UIImpactFeedbackGenerator(style: .light)
        generator.impactOccurred()

        let pickerController = UIImagePickerController()
        pickerController.delegate = self
        pickerController.allowsEditing = true
        present(pickerController, animated: true, completion: nil)
    }
}

extension DriverAplication: UINavigationControllerDelegate, UIImagePickerControllerDelegate {
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
            
        var returnedImage: UIImage?
        if let editedImg = info[.editedImage] as? UIImage {
            returnedImage = editedImg
        } else if let originalImg = info[.originalImage] as? UIImage {
            returnedImage = originalImg    
        }
        
        if let image = returnedImage { /// unwrap the image
 
            /// read what the selection type is
            if pictureSelectionType == .profilePicture {
                driverPImg.image = image
            } else { /// for ID picture
                passImg.image = image
            }
        }

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

How to use UIImagePickerController with delegate?

The simplest way is that you have already created the instance of A class. Now just directly assign the image to it.

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    let image = info[UIImagePickerControllerOriginalImage] as? UIImage // Yeah, I selected the image!!

    a.imageView.image = image

    self.dismiss(animated: true)

}

How to allow user to pick the image with Swift?

If you just want let the user choose image with UIImagePickerController use this code:

import UIKit

class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {

    @IBOutlet var imageView: UIImageView!
    @IBOutlet var chooseBuuton: UIButton!
    var imagePicker = UIImagePickerController()

    @IBAction func btnClicked() {

        if UIImagePickerController.isSourceTypeAvailable(.savedPhotosAlbum){
            print("Button capture")

            imagePicker.delegate = self
            imagePicker.sourceType = .savedPhotosAlbum
            imagePicker.allowsEditing = false

            present(imagePicker, animated: true, completion: nil)
        }
    }

    func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!){
        self.dismiss(animated: true, completion: { () -> Void in

        })

        imageView.image = image
    }
}

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