Simple calculator project for Swift development, swift development Calculator

Simple calculator project for Swift development, swift development Calculator

//

// ViewController. swift

// Calculator

//

// Created by yueda Technology on 15/1/14.

// Copyright (c) 2015 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 ()

{

// Computing

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 ("calculation", forState: UIControlState. Normal)

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

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

// The first number

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

NumOne. placeholder = "enter a number"

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)

// The second number

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

NumTwo. placeholder = "enter a number"

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 failed to = UILabel (frame: CGRectMake (210,200, 20, 30 ))

Failed to. text = "="

Failed to. font. fontWithSize (20)

Self. view. addSubview (similar)

// Sum and

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

}

/**

Computing button

*/

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 ()]

}

/**

Click Interface event

*/

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

Self. numOne. resignFirstResponder ()

Self. numTwo. resignFirstResponder ()

}

/**

Clear button

*/

Func addCleanButton (){

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

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

CleanButton. frame = frame

CleanButton. setTitle ("clear", 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

}

/**

Clear button method implementation

*/

Func cleanButtonClick (){

Self. sum. text = "0"

Self. numOne. text = ""

Self. numTwo. text = ""

If (self. sum. text = "0 "){

Self. cleanButton. hidden = true

}

}

}