NibBaseViewController

NibBaseViewController.swift

import Foundation
import UIKit

enum NibBaseError:Error {
    case badClassName
    case noNibFile
    case noStoryboard
}

class NibBaseViewController: UIViewController, IsNibBaseViewController {

    
    required init(_ : Void) throws {
        let classNameComponents = NSStringFromClass(type(of: self)).components(separatedBy: ".")
        guard let className = classNameComponents.last else {
            throw NibBaseError.badClassName
        }
        
        let bundle = Bundle(for:type(of:self))
        guard bundle.path(forResource: className, ofType: "nib") != nil else {
            throw NibBaseError.noNibFile
        }
        super.init(nibName:className, bundle: Bundle(for:type(of:self)))
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    var isNavigationBarHidden:Bool? {
        return nil
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        if let isNavigationBarHidden = isNavigationBarHidden {
            navigationController?.setNavigationBarHidden(isNavigationBarHidden, animated: true)
        }
    }
}


protocol HavingRequiredThrowingInit {
    init(_ : Void) throws
}

protocol IsNibBaseViewController: HavingRequiredThrowingInit, IsViewController {}

protocol IsViewController {
    func asViewController() -> UIViewController
}

extension UIViewController: IsViewController {
    func asViewController() -> UIViewController {
        return self
    }
        
}