ImageViewController.swift

// Author: Pierce Brooks
 
 #if os(macOS)
 import AppKit
 #else
 import UIKit
 #endif
 
 #if os(macOS)
 public class ImageBaseViewController: NSViewController {}
 #else
 public class ImageBaseViewController: UIViewController {}
 #endif
 
 class ImageViewController: ImageBaseViewController {
 #if os(macOS)
     public let image: NSImage
 #else
     public let image: UIImage
 #endif
 
 #if os(macOS)
     @available(*, unavailable)
     public required init?(
         coder aDecoder: NSCoder
     ) { nil }
 
     public init(
         image: NSImage
     ) {
         self.image = image
         super.init(nibName: nil, bundle: nil)
     }
 #else
     public init(
         image: UIImage
     ) {
         self.image = image
         super.init(coder: nil)
     }
 #endif
 
 #if os(macOS)
     private var someImageView: NSImageView? {
        let theImageView = NSImageView()
        theImageView.image = self.image
        theImageView.translatesAutoresizingMaskIntoConstraints = false
        return theImageView
     }
 #else
     private var someImageView: UIImageView? {
        let theImageView = UIImageView()
        theImageView.image = self.image
        theImageView.translatesAutoresizingMaskIntoConstraints = false
        return theImageView
     }
 #endif
 
     override func viewDidLoad() {
         super.viewDidLoad()
         let anImageView = someImageView
         if (anImageView != nil) {
             view.addSubview(anImageView!)
             imageViewConstraints(imageView: anImageView!)
         }
     }
 
 #if os(macOS)
     func imageViewConstraints(imageView: NSImageView) {
         imageView.widthAnchor.constraint(equalToConstant: 180).isActive = true
         imageView.heightAnchor.constraint(equalToConstant: 180).isActive = true
         imageView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
         imageView.centerYAnchor.constraint(equalTo: view.centerYAnchor, constant: 28).isActive = true
     }
 #else
     func imageViewConstraints(imageView: UIImageView) {
         imageView.widthAnchor.constraint(equalToConstant: 180).isActive = true
         imageView.heightAnchor.constraint(equalToConstant: 180).isActive = true
         imageView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
         imageView.centerYAnchor.constraint(equalTo: view.centerYAnchor, constant: 28).isActive = true
     }
 #endif
 }