lesson4

gistfile1.swift

//
//  ViewController.swift
//  Problem_part4
//
//  Created by masakid on 2015/03/10.
//  Copyright (c) 2015年 masaki.k. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var countLabel: UILabel!
    
    @IBAction func pressPlusButton(sender: AnyObject) {
        
        let num = self.countLabel.text?.toInt() ?? 0
        self.countLabel.text = "\(num + 1)"
        
        
    }
    
    @IBAction func pressClear(sender: AnyObject) {
        self.countLabel.text = "0"
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}