lesson3

gistfile1.swift

//
//  ViewController.swift
//  Problem_part3
//
//  Created by masakid on 2015/03/08.
//  Copyright (c) 2015年 masaki.k. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    
    
    @IBOutlet weak var calcStr1: UILabel!
    @IBOutlet weak var calcStr2: UILabel!
    @IBOutlet weak var resultLabel: UILabel!
    
    @IBOutlet weak var textField1: UITextField!
    @IBOutlet weak var textField2: UITextField!
    @IBOutlet weak var switch1: UISwitch!
    @IBOutlet weak var switch2: UISwitch!
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.switch1.on = false
        self.switch2.on = false
        self.calcStr1.text = ""
        self.calcStr2.text = ""
        self.resultLabel.text = ""
        
        // 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.
    }

    @IBAction func pressButton(sender: AnyObject) {
        //入力値取得
        let num1 = self.textField1.text.toInt() ?? 0
        let num2 = self.textField2.text.toInt() ?? 0
        
        //演算
        let numSign1 = changeSign(num1, switchFlg: self.switch1.on)
        let numSign2 = changeSign(num2, switchFlg: self.switch2.on)
        let total = numSign1 + numSign2
        
        //表示
        self.calcStr1.text = "\(numSign1)"
        self.calcStr2.text = "\(numSign2)"
        self.resultLabel.text = "\(total)"
    }
    
    
    func changeSign(num : Int , switchFlg : Bool) -> Int {
        if switchFlg {
            return num * (-1)
        } else {
            return num
        }
    }

}