DetailViewController.swift

//
//  DetailViewController.swift
//  StormViewer
//
//  Created by Julian Moorhouse on 04/07/2019.
//  Copyright © 2019 Mindwarp Consultancy Ltd. All rights reserved.
//

import UIKit

class DetailViewController: UIViewController {
    @IBOutlet var imageView: UIImageView!
    var selectedImage: String?
    var selectedPictureNumber = 0
    var totalPictures = 0
    
    override func viewDidLoad() {
        super.viewDidLoad()

        title = "Picture \(selectedPictureNumber) of \(totalPictures)"
        
        navigationItem.largeTitleDisplayMode = .never
        
        if let imageToLoad = selectedImage {
            let storm = UIImage(named: imageToLoad)
            
            let renderer = UIGraphicsImageRenderer(size: CGSize(width: storm!.size.width, height: storm!.size.height))
            
            let image = renderer.image { ctx in

                storm?.draw(at: CGPoint(x: 0, y: 0))
                
                let paragraphStyle = NSMutableParagraphStyle()
                paragraphStyle.alignment = .center
                
                let attrs: [NSAttributedString.Key: Any] = [
                    .font: UIFont.systemFont(ofSize: 36),
                    .paragraphStyle: paragraphStyle
                ]
                
                let string = "From Storm Viewer"
                
                let attributedString = NSAttributedString(string: string, attributes: attrs)
                
                attributedString.draw(with: CGRect(x: 0, y: 100, width: storm!.size.width, height: storm!.size.height - 100), options: .usesLineFragmentOrigin, context: nil)

                
            }
            imageView.image = image
        }
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        navigationController?.hidesBarsOnTap = true
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        navigationController?.hidesBarsOnTap = false
    }
}