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Jungpyo Hong 2021-05-05 12:16:07 -05:00 committed by GitHub
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//
// ImagePicker.swift
//
// Created by JungpyoHong on 4/21/21.
//
import UIKit
public protocol ImagePickerDelegate: AnyObject {
func didSelect(image: UIImage?)
}
open class ImagePicker: NSObject {
private let imagePicker: UIImagePickerController
private weak var presentationController: UIViewController?
private weak var delegate: ImagePickerDelegate?
public init(presentationController: UIViewController, delegate: ImagePickerDelegate) {
self.imagePicker = UIImagePickerController()
super.init()
self.presentationController = presentationController
self.delegate = delegate
self.imagePicker.delegate = self
self.imagePicker.allowsEditing = true
self.imagePicker.mediaTypes = ["public.image"]
}
private func action(for type: UIImagePickerController.SourceType, title: String) -> UIAlertAction? {
guard UIImagePickerController.isSourceTypeAvailable(type) else {
return nil
}
return UIAlertAction(title: title, style: .default) { [weak self] _ in
self?.imagePicker.sourceType = type
self?.presentationController?.present(self?.imagePicker ?? UIImagePickerController(), animated: true)
}
}
public func present(from sourceView: UIView) {
let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
if let action = self.action(for: .camera, title: "Take photo") {
alertController.addAction(action)
}
if let action = self.action(for: .savedPhotosAlbum, title: "Camera roll") {
alertController.addAction(action)
}
if let action = self.action(for: .photoLibrary, title: "Photo library") {
alertController.addAction(action)
}
alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
self.presentationController?.present(alertController, animated: true)
}
private func pickerController(_ controller: UIImagePickerController, didSelect image: UIImage?) {
controller.dismiss(animated: true, completion: nil)
self.delegate?.didSelect(image: image)
}
}
extension ImagePicker: UIImagePickerControllerDelegate {
public func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
self.pickerController(picker, didSelect: nil)
}
public func imagePickerController(_ picker: UIImagePickerController,
didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
guard let image = info[.editedImage] as? UIImage else {
return self.pickerController(picker, didSelect: nil)
}
self.pickerController(picker, didSelect: image)
}
}
extension ImagePicker: UINavigationControllerDelegate {
}