MealViewController.swift

//
//  MealViewController.swift
//  iOSTemplate
//
//  Created by John Hampton on 2/24/19.
//

import UIKit

class MealViewController: UIViewController, UITextFieldDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    // MARK: Properties
    @IBOutlet weak var nameTextField: UITextField!
    @IBOutlet weak var photoImageView: UIImageView!
    @IBOutlet weak var ratingControl: RatingControl!
    
    override func viewDidLoad() {
        super.viewDidLoad()

        // Handle the text field’s user input through delegate callbacks.
        nameTextField.delegate = self
    }

    //MARK: UITextFieldDelegate
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        // Hide the keyboard.
        textField.resignFirstResponder()
        return true
    }
    
    func textFieldDidEndEditing(_ textField: UITextField) {
    }
    
    //MARK: UIImagePickerControllerDelegate
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        // Dismiss the picker if the user canceled.
        dismiss(animated: true, completion: nil)
    }
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
        // The info dictionary may contain multiple representations of the image. You want to use the original.
        guard let selectedImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage else {
            fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
        }
        
        // Set photoImageView to display the selected image.
        photoImageView.image = selectedImage
        
        // Dismiss the picker.
        dismiss(animated: true, completion: nil)
    }
    
    // MARK: Actions
    @IBAction func selectImageFromPhotoLibrary(_ sender: UITapGestureRecognizer) {
        // Hide the keyboard.
        nameTextField.resignFirstResponder()
        
        // UIImagePickerController is a view controller that lets a user pick media from their photo library.
        let imagePickerController = UIImagePickerController()
        
        // Only allow photos to be picked, not taken.
        imagePickerController.sourceType = .photoLibrary
        
        // Make sure ViewController is notified when the user picks an image.
        imagePickerController.delegate = self
        present(imagePickerController, animated: true, completion: nil)
    }
    
}