Super View controller for iOS swift apps

SuperViewController.swift

//
//  SuperViewController.swift
//  Mouce
//
//  Created by Célian MOUTAFIS on 15/06/2016.
//  Copyright © 2016 Célian MOUTAFIS. All rights reserved.
//

import Foundation
import UIKit

public class SuperViewController : UIViewController {
    
    override public func preferredStatusBarStyle() -> UIStatusBarStyle {
        return UIStatusBarStyle.Default
    }
    
    override public func prefersStatusBarHidden() -> Bool {
        return false
    }
    
    override public func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        
        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(keyboardWillShow), name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(keyboardWillHide), name: UIKeyboardWillHideNotification, object: nil)
        
    }
    
    override public func viewWillDisappear(animated: Bool) {
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
        super.viewWillDisappear(animated)
    }
    
    
    var appDelegate: AppDelegate {
        
        get {return UIApplication.sharedApplication().delegate! as! AppDelegate}
    }
    
    
    func keyboardWillShow(notification : NSNotification){
        let frame : CGRect = (notification.userInfo![UIKeyboardFrameEndUserInfoKey] as? NSValue)!.CGRectValue()
        self.keyboardWillChangeFrame(frame, notification: notification)
    }
    
    func keyboardWillHide(notification : NSNotification){
        let frame : CGRect = CGRectZero
        self.keyboardWillChangeFrame(frame, notification: notification)
    }
    
    
    func keyboardWillChangeFrame(frame : CGRect, notification : NSNotification){
        
    }
    
}