How to load image from camera or photo library in Swift [closed] - ios

Question

Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 6 years ago.
Improve this question
How do you take a photo with the camera or pick an image from the photo library to be able to display it in an imageView for example?
Any help on this would be appreciated.

Answer 1

Full update for Swift 5+ including Github Repo
First of all we want to organize everything into a dedicated class.
import MobileCoreServices
import UIKit
class CameraProvider: NSObject {
enum PhotoLibraryTypes {
case photoLibrary, savedPhotosAlbum
var casted: UIImagePickerController.SourceType {
switch self {
case .photoLibrary: return UIImagePickerController.SourceType.photoLibrary
case .savedPhotosAlbum: return UIImagePickerController.SourceType.savedPhotosAlbum
}
}
}
public typealias SourceType = UIImagePickerController.SourceType
public typealias ImagePicker = UIImagePickerController
public typealias Delegate = UINavigationControllerDelegate & UIImagePickerControllerDelegate
private let delegate: Delegate
init(delegate: Delegate) {
self.delegate = delegate
}
// MARK: - Public
public func getImagePicker(source: PhotoLibraryTypes,
canEditPhotos: Bool = true,
onlyImages: Bool = false) throws -> ImagePicker {
do {
return try getBaseController(
source: source.casted,
allowsEditing: canEditPhotos,
onlyImages: onlyImages
)
} catch {
throw error
}
}
public func getCamera(canEditPhotos: Bool = true,
onlyImages: Bool = false) throws -> ImagePicker {
do {
let picker = try getBaseController(
source: .camera,
allowsEditing: canEditPhotos,
onlyImages: onlyImages
)
if UIImagePickerController.isCameraDeviceAvailable(.rear) {
picker.cameraDevice = .rear
} else if UIImagePickerController.isCameraDeviceAvailable(.front) {
picker.cameraDevice = .front
} else {
throw "No known camera type available"
}
picker.showsCameraControls = true
return picker
} catch {
throw error
}
}
// MARK: - Private
private func getBaseController(source: SourceType,
allowsEditing: Bool,
onlyImages: Bool) throws -> ImagePicker {
guard UIImagePickerController.isSourceTypeAvailable(source) else {
throw "Requested source not available"
}
let picker = UIImagePickerController()
let imageType = kUTTypeImage as String
picker.sourceType = source
picker.allowsEditing = allowsEditing
picker.delegate = self.delegate
if onlyImages,
let mediaTypes = UIImagePickerController.availableMediaTypes(for: source),
mediaTypes.contains(imageType){
picker.mediaTypes = [imageType]
}
return picker
}
}
extension String: LocalizedError {
public var errorDescription: String? { return self }
}
Lastly we call our CameraProvider as following.
import UIKit
class ViewController: UIViewController {
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let provider = CameraProvider(delegate: self)
do {
let picker = try provider.getImagePicker(source: .photoLibrary)
present(picker, animated: true)
} catch {
NSLog("Error: \(error.localizedDescription)")
}
}
}
extension ViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
let image = (
info[UIImagePickerController.InfoKey.editedImage] as? UIImage ??
info[UIImagePickerController.InfoKey.originalImage] as? UIImage
)
picker.dismiss(animated: true, completion: nil)
}
}