lesson2

gistfile1.swift

//
//  ViewController.swift
//  Problem_part2
//
//  Created by 久保田 将規 on 2015/03/08.
//  Copyright (c) 2015年 masaki.k. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    
    
    @IBOutlet weak var textField1: UITextField!
    @IBOutlet weak var textField2: UITextField!
    @IBOutlet weak var segmentedControl: UISegmentedControl!
    @IBOutlet weak var resultLabel: UILabel!
    
    let plus : String = "+"
    let minus : String = "-"
    let multiply : String  = "×"
    let divide : String = "÷"
    
    override func viewDidLoad() {
        super.viewDidLoad()
        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 pressResultButton(sender: AnyObject) {
        let target1 = (self.textField1.text as NSString).doubleValue ?? 0
        let target2 = (self.textField2.text as NSString).doubleValue ?? 0
        let num = self.segmentedControl.selectedSegmentIndex
        
        var total = ""
        if let title = self.segmentedControl.titleForSegmentAtIndex(num) {
            switch title {
            case plus:
                total = "\(target1 + target2)"
            case minus:
                total = "\(target1 - target2)"
            case multiply:
                total = "\(target1 * target2)"
            case divide:
                if target2 == 0.0 {
                    total = "割る数には0以外を入力して下さい"
                } else {
                    total = "\(target1 / target2)"
                }
            default:
                total = ""
            }
            self.resultLabel.text = total
        }
        
    }

}