KeyboardControl.swift

import UIKit

class ViewController: UIViewController {
    
    let keyboard = KeyboardControl()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.title = "Timepad"
        self.view.backgroundColor = UIColor.whiteColor()
 
        let gesture = UITapGestureRecognizer(target: keyboard, action: #selector(keyboard.show))
        self.view.addGestureRecognizer(gesture)
    }
    
}

class KeyboardControl : UIControl, UIKeyInput {
    
    init() {
        super.init(frame: CGRectZero)
    }
    
    override func canBecomeFirstResponder() -> Bool {
        return true
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    func show() {
        becomeFirstResponder()
    }
    
    // MARK: UIKeyInput
    
    func hasText() -> Bool {
        return true
    }
    
    func insertText(text: String) {
        print(text)
    }
    
    func deleteBackward() {
        return
    }
}