151 lines
4.9 KiB
Swift
151 lines
4.9 KiB
Swift
//
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// ViewController.swift
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// Names And Faces
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//
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// Created by Brian Sipple on 1/23/19.
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// Copyright © 2019 Brian Sipple. All rights reserved.
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//
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import UIKit
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class HomeViewController: UICollectionViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
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var people: [Person]!
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override func viewDidLoad() {
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super.viewDidLoad()
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// Do any additional setup after loading the view, typically from a nib.
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loadData()
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navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addNewPerson))
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}
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override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
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return people.count
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}
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override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
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let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Person", for: indexPath) as! PersonCell
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let person = people[indexPath.item]
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cell.personImageView.image = UIImage(contentsOfFile: getURL(forFile: person.imageName).path)
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cell.personNameLabel.text = person.name
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setStyles(forCell: cell)
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return cell
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}
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override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
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let person = people[indexPath.item]
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promptForName(of: person)
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}
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/*
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Handles the completion of adding an image to the picker. Our flow:
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- Extract the image from the dictionary that is passed as a parameter.
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- Generate a unique filename for it.
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- Convert it to a JPEG
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- Write that JPEG to disk.
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- Dismiss the view controller.
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*/
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func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
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guard let imagePicked = info[.editedImage] as? UIImage else { return }
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let fileName = UUID().uuidString
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let imageURL = getURL(forFile: fileName)
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if let jpegData = imagePicked.jpegData(compressionQuality: 0.8) {
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try? jpegData.write(to: imageURL)
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}
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people.append(Person(name: "Unknown", imageName: fileName))
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saveData()
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collectionView?.reloadData()
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picker.dismiss(animated: true)
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}
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@objc func addNewPerson() {
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let imagePicker = UIImagePickerController()
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imagePicker.allowsEditing = true
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imagePicker.delegate = self
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if UIImagePickerController.isSourceTypeAvailable(.camera) {
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// 📝 TODO: Add additional logic to ask the user if they'd like to use their device camera
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// imagePicker.sourceType = .camera
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}
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present(imagePicker, animated: true)
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}
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func getDocumentsDirectoryURL() -> URL {
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let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
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return paths[0]
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}
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func getURL(forFile fileName: String) -> URL {
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return getDocumentsDirectoryURL().appendingPathComponent(fileName)
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}
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func setStyles(forCell cell: PersonCell) {
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cell.personImageView.layer.borderColor = UIColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.3).cgColor
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cell.personImageView.layer.borderWidth = 2
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cell.personImageView.layer.cornerRadius = 3
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cell.layer.cornerRadius = 7
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}
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func promptForName(of person: Person) {
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let alertController = UIAlertController(title: "Who is this?", message: nil, preferredStyle: .alert)
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alertController.addTextField()
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alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel))
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alertController.addAction(
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UIAlertAction(title: "OK", style: .default) { [unowned self, alertController] _ in
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let newName = alertController.textFields![0].text!
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person.name = newName
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self.saveData()
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self.collectionView?.reloadData()
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}
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)
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present(alertController, animated: true)
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}
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func saveData() {
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if let savedData = try? NSKeyedArchiver.archivedData(withRootObject: people, requiringSecureCoding: false) {
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let defaults = UserDefaults.standard
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defaults.set(savedData, forKey: "people")
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}
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}
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func loadData() {
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let defaults = UserDefaults.standard
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if let savedPeople = defaults.object(forKey: "people") as? Data {
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if let decodedPeople = try? NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(savedPeople) as? [Person] {
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people = decodedPeople ?? [Person]()
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}
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}
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}
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}
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