# Swift 4.2
Read the Swift3 article here.
Selecting images with UIImagePickerController
It is a sample program to get an image from the photo library of the iPhone.
In order to select images from the photo library, the project's info.plist should state that the photo library will be used.
If you don't write this, UIImagePickerController won't work.
Use the following values for the key
NSPHOtoLibraryUsageDescription.
The Type is a String and the reason for use is written in the Value.
I've heard that if you don't write the reason for using it, it will be rejected at the time of examination.
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| import UIKit | |
| class ImagePickerViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate { | |
| var picker: UIImagePickerController! | |
| var button: UIButton! | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| view.backgroundColor = .white | |
| picker = UIImagePickerController() | |
| picker.delegate = self | |
| picker.sourceType = UIImagePickerController.SourceType.photoLibrary | |
| picker.allowsEditing = true // Whether to make it possible to edit the size etc after selecting the image | |
| // set picker's navigationBar appearance | |
| picker.view.backgroundColor = .white | |
| picker.navigationBar.isTranslucent = false | |
| picker.navigationBar.barTintColor = .blue | |
| picker.navigationBar.tintColor = .white | |
| picker.navigationBar.titleTextAttributes = [ | |
| NSAttributedString.Key.foregroundColor: UIColor.white | |
| ] // Title color | |
| button = UIButton() | |
| button.addTarget(self, action: #selector(touchUpInside(_:)), for: UIControl.Event.touchUpInside) | |
| let size = view.frame.width * 0.8 | |
| button.setTitle("Push Me", for: UIControl.State.normal) | |
| button.frame.size = CGSize(width: size, height: size) | |
| button.titleLabel?.font = UIFont.systemFont(ofSize: 28) | |
| button.center = view.center | |
| button.backgroundColor = .orange | |
| view.addSubview(button) | |
| } | |
| @objc func touchUpInside(_ sender: UIButton) { | |
| // show picker modal | |
| present(picker, animated: true, completion: nil) | |
| } | |
| // MARK: ImageVicker Delegate Methods | |
| // called when image picked | |
| func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) { | |
| if let editedImage = info[UIImagePickerController.InfoKey.editedImage] as? UIImage { | |
| button.setBackgroundImage(editedImage, for: .normal) | |
| } else if let originalImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage { | |
| button.setBackgroundImage(originalImage, for: .normal) | |
| } | |
| dismiss(animated: true, completion: nil) | |
| } | |
| // called when cancel select image | |
| func imagePickerControllerDidCancel(_ picker: UIImagePickerController) { | |
| // close picker modal | |
| dismiss(animated: true, completion: nil) | |
| } | |
| } |