Why is button background changing to blue when button selected? - ios

Question

I have three buttons, when selected they change background color to red - yet a blue background is popping up as well and I can't figure out why (sorry if the reason is obvious, ive only been doing "programming" for 3 weeks. I can't find anything in the code that would explain itI have three buttons, when selected they change background color to red - yet a blue background is popping up as well and I can't figure out why (sorry if the reason is obvious, ive only been doing "programming" for 3 weeks. I can't find anything in the code that would explain it
[enter image description here][1]import UIKit
class ViewController: UIViewController {
var counterEN : Int = 0
var count = Array(1...150).filter { $0 % 1 != 0}.count
var pizzaCount = 0
#IBOutlet weak var pizzaCounter: UILabel!
#IBOutlet weak var textField: UITextField!
#IBAction func test(_ sender: UIButton) {
self.textField.text = sender.currentTitle
}
var lastY: CGFloat = 100
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func buttonClicked(_ sender: UIButton) {
pizzaCount = pizzaCount + 1
pizzaCounter.text = ("Antal pizza: ") + "\(pizzaCount)"
let contentView = UIView()
addViewsTo(contentView, title: sender.currentTitle)
contentView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(contentView)
// Add size constraints to the content view (260, 30)
NSLayoutConstraint(item: contentView, attribute: .width, relatedBy: .equal,
toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 850.0).isActive = true
NSLayoutConstraint(item: contentView, attribute: .height, relatedBy: .equal,
toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: ` 30.0).isActive = true
// Add position constraints to the content view (horizontal center, 100 from the top)
NSLayoutConstraint(item: contentView, attribute: .top, relatedBy: .equal, toItem: view, attribute: .top, multiplier: 1.0, constant: lastY).isActive = true
NSLayoutConstraint(item: contentView, attribute: .centerX, relatedBy: .equal, toItem: view, attribute: .centerX, multiplier: 1.0, constant: 0.0).isActive = true
// Update last Y position to have the gaps between views to be 10
lastY += 50
}
// Add label and button to the content view
func addViewsTo(_ contentView: UIView, title: String?) {
// Add a label with size of (100, 30)
let label = UILabel()
label.text = title
//label.text = ("1 x 17 ")
label.frame = CGRect(x: 0.0, y: 0.0, width: 100.0, height: 30.0)
contentView.addSubview(label)
let DressingButton = UIButton(type: .system)
DressingButton.frame = CGRect(x: 210, y: 0, width: 40, height: 30)
DressingButton.setTitle("D", for: .normal)
DressingButton.setTitleColor(.black, for: .normal)
DressingButton.setTitleColor(.red, for: .selected)
DressingButton.sendActions(for: .touchUpInside)
contentView.addSubview(DressingButton)
DressingButton.addTarget(self, action: #selector(dressingAction(_:)), for .touchUpInside)
let Chili = UIButton(type: .system)
Chili.frame = CGRect(x: 160, y: 0, width: 40, height: 30)
Chili.setTitle("C", for: .normal)
Chili.setTitleColor(.black, for: .normal)
Chili.backgroundColor = UIColor.white
Chili.setTitleColor(.systemRed, for: .selected)
Chili.sendActions(for: .touchUpInside)
contentView.addSubview(Chili)
Chili.addTarget(self, action: #selector(dressingAction(_:)), for: .touchUpInside)
let Hvidløg = UIButton(type: .system)
Hvidløg.frame = CGRect(x: 110, y: 0, width: 40, height: 30)
Hvidløg.setTitle("H", for: .normal)
Hvidløg.setTitleColor(.black, for: .normal)
Hvidløg.setTitleColor(.red, for: .selected)
Hvidløg.backgroundColor = UIColor.white
Hvidløg.sendActions(for: .touchUpInside)
contentView.addSubview(Hvidløg)
Hvidløg.addTarget(self, action: #selector(dressingAction(_:)), for: .touchUpInside)
let button2 = UIButton(type: .system)
button2.frame = CGRect(x: -40, y: 20, width: 150, height: 30)
button2.setTitle("Alm", for: .normal)
button2.setTitle("Ful", for: .selected)
button2.setTitle("Glu", for: .selected)
// Set button action
button2.addTarget(self, action: #selector(buttonAction(_:)), for: .touchUpInside)
contentView.addSubview(button2)
self.view = view
}
#objc func dressingAction(_ sender:UIButton){
sender.isSelected.toggle()
print("knap")
sender.backgroundColor = UIColor.red
}
#objc func buttonAction(_ sender:UIButton!)
{
sender.isSelected = !sender.isSelected
sender.setTitle("Alm", for: .normal)
if sender.isSelected{
sender.setTitle("Fuld", for: .selected)}
else {
sender.setTitle("Glu", for: .selected)
sender.isSelected = !sender.isSelected
// sender.tintColor = .clear
//// if sender.isSelected{
// sender.setTitleColor(.green, for: .selected)
// }
// else{
// sender.setTitleColor(.blue, for: .selected)
//
func buttonAction(_ button3:UIButton!) {
print("Button tapped"); counterEN += 1; count += 1; print (counterEN); print (count)
}
}
}
}

Answer 1

Please change your button type to .custom and the issue will be solved.
let dressingButton = UIButton(type: .custom)

Answer 2

Try changing your button Type to custom