Swift计算器

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//

//  ViewController.swift

//  FristSwift

//

//  Created by Evan on 16/6/23.

//  Copyright © 2016年 Evan. All rights reserved.

//

import UIKit

let SCREEN_WIDTH = UIScreen.mainScreen().bounds.size.width;

let SCREEN_HEIGHT = UIScreen.mainScreen().bounds.size.height;

class ViewController: UIViewController

{

    let textFile1:UITextField = UITextField(frame:CGRectZero)

    let plusLable:UILabel = UILabel(frame:CGRectZero)

    let textFile2:UITextField = UITextField(frame:CGRectZero)

    let equalLable:UILabel = UILabel(frame: CGRectZero)

    let resultLable:UILabel = UILabel(frame:CGRectZero)

    let button:UIButton = UIButton(frame:CGRectZero)

   override func viewDidLoad()

    {

        super.viewDidLoad()

        self.addContent();

        self.contentContraints();

    }

    func addContent()

    {

        textFile1.backgroundColor = UIColor.redColor()

        textFile1.keyboardType = UIKeyboardType.NumberPad

        self.view.addSubview(textFile1)

        plusLable.text = "+"

        plusLable.textColor = UIColor.greenColor()

        self.view.addSubview(plusLable)

        textFile2.backgroundColor = UIColor.redColor()

        textFile2.keyboardType = UIKeyboardType.NumberPad

        self.view.addSubview(textFile2)

        equalLable.text = "＝"

        equalLable.textColor = UIColor.greenColor()

        self.view.addSubview(equalLable)

        resultLable.backgroundColor = UIColor.redColor()

        self.view.addSubview(resultLable)

        button.backgroundColor = UIColor.redColor()

        button.setTitle("计算", forState:UIControlState.Normal)

        button.addTarget(self,action:Selector("buttonClick"),forControlEvents:UIControlEvents.TouchUpInside)

        self.view.addSubview(button)

    }

    func buttonClick()

    {

        let resultNum = (textFile1.text! as NSString).intValue + (textFile2.text! as NSString).intValue

        let resultStr = String(resultNum)

        resultLable.text = resultStr

        print(resultStr)

    }

      func contentContraints()

    {

        textFile1.frame = CGRectMake(10, 30, 50, 50)

        plusLable.frame = CGRectMake(65, 40, 20, 20)

        textFile2.frame = CGRectMake(80, 30, 50, 50)

        equalLable.frame = CGRectMake(135, 40, 20, 20)

        resultLable.frame = CGRectMake(155, 30, 50, 50)

        button.frame = CGRectMake(50, 100, 100, 30)

    }

}

Swift计算器

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原文地址：http://www.cnblogs.com/happyEveryData/p/5610898.html