Change a button background on click of another button - ios

Question

I use this code so that when I click on a button its background changes to a picture with a white border and when I press it again it changes to a picture with a gray background (the button always has a gray background).
How can I do so that when I click on another button (clear and equal), the background of the "+", "-", "/", "*" changes to gray as it was before pressing.
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var displayResultLabel: UILabel!
var stillTyping = false
var dotIsPlaced = false
var firstOperand: Double = 0
var secondOperand: Double = 0
var operationSign: String = ""
var currentInput: Double {
get {
return Double (displayResultLabel.text!)!
}
set {
let value = "\(newValue)"
let ValueArray = (value.components(separatedBy:"."))
if ValueArray[1] == "0" {
displayResultLabel.text = "\(ValueArray[0])"
} else {
displayResultLabel.text = "\(newValue)"
}
stillTyping = false
}
}
#IBAction func numberPressed(_ sender: UIButton) {
let number = sender.currentTitle!
if stillTyping {
if (displayResultLabel.text?.characters.count)! < 20 {
displayResultLabel.text = displayResultLabel.text! + number
}
} else {
displayResultLabel.text = number
stillTyping = true
}
}
#IBAction func twoOperandsSignPressed(sender: UIButton) {
operationSign = sender.currentTitle!
firstOperand = currentInput
stillTyping = false
dotIsPlaced = false
}
func operateWithTwoOperands(operation: (Double, Double) -> Double) {
currentInput = operation(firstOperand, secondOperand)
stillTyping = false
}
#IBAction func equalitySignPressed(sender: UIButton) {
if stillTyping {
secondOperand = currentInput
}
dotIsPlaced = false
switch operationSign {
case "+":
operateWithTwoOperands{$0 + $1}
case "-":
operateWithTwoOperands{$0 - $1}
case "✕":
operateWithTwoOperands{$0 * $1}
case "÷":
operateWithTwoOperands{$0 / $1}
default: break
}
}
#IBAction func clearButtonPressed(_ sender: UIButton) {
firstOperand = 0
secondOperand = 0
currentInput = 0
displayResultLabel.text = "0"
dotIsPlaced = false
operationSign = ""
}
// +,-
#IBAction func plusMinusButtonPressed(_ sender: UIButton) {
currentInput = -currentInput
}
#IBAction func percentageButtonPressed(_ sender: UIButton) {
if firstOperand == 0 {
currentInput = currentInput / 100
} else {
secondOperand = firstOperand * currentInput / 100
}
}
#IBAction func squareRootButtonPressed(_ sender: UIButton) {
currentInput = sqrt(currentInput)
}
#IBAction func dotButtonPressed(_ sender: UIButton) {
if stillTyping && !dotIsPlaced {
displayResultLabel.text = displayResultLabel.text! + "."
dotIsPlaced = true
} else if !stillTyping && !dotIsPlaced {
displayResultLabel.text = "0."
}
#IBAction func PercentAnimate(_ sender: UIButton) {
if sender.currentBackgroundImage == image_off {
sender.setBackgroundImage(Image_on, for: .normal)
} else {
sender.setBackgroundImage(image_off, for: .normal)
}
if (previousButton !== sender) {
previousButton.setBackgroundImage(image_off, for: .normal)
previousButton = sender
}
}
override var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
}

Answer 1

Here is the code you can Create border to any View, in your case it will be button.
func createBordersWithColor(color: UIColor, myView : UIView) {
myView.layer.borderWidth = 1
myView.layer.cornerRadius = 0
myView.layer.shouldRasterize = false
myView.layer.rasterizationScale = 2
myView.clipsToBounds = true
myView.layer.masksToBounds = true
let cgColor: CGColor = color.cgColor
myView.layer.borderColor = cgColor
}
You can use the above function with you code like
#IBAction func PercentAnimate(_ sender: UIButton) {
let btnCurrent : UIButton = sender as! UIButton
let btnPrevious : UIButton = previousButton as! UIButton
createBorderWithColor(color : UIColor.clear , myView : btnPrevious)
createBorderWithColor(color : UIColor.clear , myView : btnCurrent)
if (previousButton !== sender) {
previousButton = sender
}
}
let know if it helps, or you need any explanation.
If you want to set with image
#IBAction func PercentAnimate(_ sender: UIButton) {
let btnCurrent : UIButton = sender as! UIButton
let btnPrevious : UIButton = previousButton as! UIButton
btnPrevious.setBackgroundImage(image_off, for: .normal)
btnCurrent.setBackgroundImage(image_on, for: .normal)
if (previousButton !== sender) {
previousButton = sender
}
}