Swift開發之簡單計算器項目

//

//  ViewController.swift

//  計算器

//

//  Created by 悅兌科技 on 15/1/14.

//  Copyright (c) 2015年 BSY. All rights reserved.

//

import UIKit

class ViewController: UIViewController {

    var numOne = UITextField()

    var numTwo = UITextField()

    var cleanButton = UIButton()

    var sum = UILabel()

    override func viewDidLoad() {

        super.viewDidLoad()

        self.view.backgroundColor = UIColor.brownColor()

        [self .addAllSubViews()]

    }

    func addAllSubViews()

    {

        // 計算

        var button:UIButton = UIButton.buttonWithType(UIButtonType.Custom) as UIButton

        var frame = CGRectMake(100, 300, 100, 30)

        button.frame = frame

        self.view.addSubview(button)

        button.backgroundColor = UIColor.lightGrayColor()

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

        button.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)

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

        // 第1個數

        var numOne = UITextField(frame: CGRectMake(10, 200, 80, 30))

        numOne.placeholder = "輸1個數"

        numOne.layer.borderColor = UIColor.lightGrayColor().CGColor

        numOne.layer.borderWidth = 2

        numOne.layer.cornerRadius = 5

        self.view.addSubview(numOne)

        numOne.keyboardType = UIKeyboardType.NumberPad

        self.numOne = numOne

        var add = UILabel(frame: CGRectMake(100, 200, 20, 30))

        add.text = "+"

        add.font.fontWithSize(20)

        self.view.addSubview(add)

        // 第2個數

        var numTwo = UITextField(frame: CGRectMake(120, 200, 80, 30))

        numTwo.placeholder = "輸1個數"

        numTwo.layer.borderColor = UIColor.lightGrayColor().CGColor

        numTwo.layer.borderWidth = 2

        numTwo.layer.cornerRadius = 5

        self.view.addSubview(numTwo)

        numTwo.keyboardType = UIKeyboardType.NumberPad

        self.numTwo = numTwo

        var equalTo = UILabel(frame: CGRectMake(210, 200, 20, 30))

        equalTo.text = "="

        equalTo.font.fontWithSize(20)

        self.view.addSubview(equalTo)

        // sum  和

        var sum = UILabel(frame: CGRectMake(230, 200, 80, 30))

        sum.textAlignment = NSTextAlignment.Center

        sum.font.fontWithSize(20)

        sum.text = "0"

        self.view.addSubview(sum)

        sum.layer.borderWidth = 2

        sum.layer.borderColor = UIColor.lightGrayColor().CGColor

        self.sum  = sum

    }

    /**

    計算按鈕

    */

 func OnClick()

{

    var sum =  NSString(string: self.numOne.text).intValue + NSString(string: self.numTwo.text).intValue

    self.sum.text = NSString(string: String(sum))

    [self .addCleanButton()]

}

    /**

    點擊界面事件

    */

    override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {

        self.numOne.resignFirstResponder()

        self.numTwo.resignFirstResponder()

    }

    /**

    清除按鈕

    */

    func addCleanButton(){

        var cleanButton:UIButton = UIButton.buttonWithType(UIButtonType.Custom) as UIButton

        var frame = CGRectMake(220, 240, 50, 30)

        cleanButton.frame = frame

        cleanButton.setTitle("清除", forState: UIControlState.Normal)

        cleanButton.setTitleColor(UIColor.redColor(), forState: UIControlState.Normal)

        self.view.addSubview(cleanButton)

        cleanButton.addTarget(self, action: "cleanButtonClick", forControlEvents: UIControlEvents.TouchUpInside)

        self.cleanButton = cleanButton

    }

    /**

    清除按鈕方法實現

    */

    func cleanButtonClick(){

    self.sum.text = "0"

    self.numOne.text = ""

    self.numTwo.text = ""

        if(self.sum.text=="0"){

        self.cleanButton.hidden = true

        }

}

}

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