How to get info which specific button is tapped in UIView in another view - ios

Question

I want to add a countdown option to my application. There are 4 ways to select the countdown time. I made a separate UIView which I named BreakTimeView. I have 4 buttons there. I want to get info in the main viewController when pressing one of them. I want this info to give me a specific number of seconds for the timer to count down. I know that if I made this view from scratch in the main viewController, I could trigger my own action. But I don't know how to do it to pass this number of seconds (Int) if the button is in a separate view. I did something like that, but in my opinion it doesn't look good and the question is how can I do it better / smarter?
class ViewController: UIViewController {
var value: Int = 0
var bV = BreakTimeView()
override func viewDidLoad() {
super.viewDidLoad()
bV = BreakTimeView(frame: CGRect(x: 0,
y: view.frame.maxY + 50,
width: view.frame.size.width,
height: view.frame.size.width))
view.addSubview(bV)
let tap = UITapGestureRecognizer(target: self, action: #selector(animate))
view.addGestureRecognizer(tap)
bV.checkButtonPressed = {
self.value = 30
print(self.value)
}
bV.checkButtonPressed2 = {
self.value = 45
print(self.value)
}
bV.checkButtonPressed3 = {
self.value = 60
print(self.value)
}
bV.checkButtonPressed4 = {
self.value = 90
print(self.value)
}
}
#objc func animate(){
UIView.animate(withDuration: 1) {
self.bV.transform = CGAffineTransform(translationX: 0, y: -self.bV.frame.size.width - 50)
} completion: { completed in
print("Ekran wjechał")
}
}
}
class BreakTimeView: UIView{
private let title = UILabel()
private let button1 = UIButton()
private let button2 = UIButton()
private let button3 = UIButton()
private let button4 = UIButton()
private let horizonralStack1 = UIStackView()
private let horizontalStack2 = UIStackView()
private let verticalStack = UIStackView()
var checkButtonPressed : (() -> ()) = {}
var checkButtonPressed2 : (() -> ()) = {}
var checkButtonPressed3 : (() -> ()) = {}
var checkButtonPressed4 : (() -> ()) = {}
override init(frame: CGRect) {
super.init(frame: frame)
layer.cornerRadius = 20
backgroundColor = .gray
configureTitile()
configureButtons()
configureHS1()
configureHS2()
addSubview(verticalStack)
verticalStack.addArrangedSubview(horizonralStack1)
verticalStack.addArrangedSubview(horizontalStack2)
verticalStack.axis = .vertical
verticalStack.distribution = .fillEqually
verticalStack.spacing = 20
verticalStack.translatesAutoresizingMaskIntoConstraints = false
verticalStack.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 20).isActive = true
verticalStack.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -20).isActive = true
verticalStack.topAnchor.constraint(equalTo: title.bottomAnchor, constant: 20).isActive = true
verticalStack.bottomAnchor.constraint(equalTo: self.bottomAnchor, constant: -20).isActive = true
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func configureTitile() {
title.text = "Wybierz czas przerwy"
title.font = UIFont.systemFont(ofSize: 25)
title.textAlignment = .center
title.layer.cornerRadius = 20
title.layer.masksToBounds = true
title.backgroundColor = .red
title.translatesAutoresizingMaskIntoConstraints = false
addSubview(title)
title.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 40).isActive = true
title.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -40).isActive = true
title.topAnchor.constraint(equalTo: self.topAnchor, constant: -40).isActive = true
title.heightAnchor.constraint(equalToConstant: 80).isActive = true
}
private func configureButtons(){
button1.layer.cornerRadius = 20
button1.backgroundColor = .red
button1.setTitle("30s", for: .normal)
button1.titleLabel?.font = UIFont.systemFont(ofSize: 30)
button1.addTarget(self, action: #selector(butt1), for: .touchUpInside)
button2.layer.cornerRadius = 20
button2.backgroundColor = .red
button2.setTitle("45s", for: .normal)
button2.titleLabel?.font = UIFont.systemFont(ofSize: 30)
button2.addTarget(self, action: #selector(butt2), for: .touchUpInside)
button3.layer.cornerRadius = 20
button3.backgroundColor = .red
button3.setTitle("60s", for: .normal)
button3.titleLabel?.font = UIFont.systemFont(ofSize: 30)
button3.addTarget(self, action: #selector(butt3), for: .touchUpInside)
button4.layer.cornerRadius = 20
button4.backgroundColor = .red
button4.setTitle("90s", for: .normal)
button4.titleLabel?.font = UIFont.systemFont(ofSize: 30)
button4.addTarget(self, action: #selector(butt4), for: .touchUpInside)
}
#objc private func butt1(){
checkButtonPressed()
}
#objc private func butt2(){
checkButtonPressed2()
}
#objc private func butt3(){
checkButtonPressed3()
}
#objc private func butt4(){
checkButtonPressed4()
}
fileprivate func configureHS1() {
horizonralStack1.addArrangedSubview(button1)
horizonralStack1.addArrangedSubview(button2)
horizonralStack1.axis = .horizontal
horizonralStack1.distribution = .fillEqually
horizonralStack1.spacing = 20
}
fileprivate func configureHS2() {
horizontalStack2.addArrangedSubview(button3)
horizontalStack2.addArrangedSubview(button4)
horizontalStack2.axis = .horizontal
horizontalStack2.distribution = .fillEqually
horizontalStack2.spacing = 20
}
Of course, I will not print the number of seconds in the application, but I will pass it to a separate function that supports the timer, but for the purposes of the demo I only have this

Answer 1

Inside BreakTimeView replace these callbacks -
var checkButtonPressed : (() -> ()) = {}
var checkButtonPressed2 : (() -> ()) = {}
var checkButtonPressed3 : (() -> ()) = {}
var checkButtonPressed4 : (() -> ()) = {}
with
var checkButtonPressed : ((_ numberOfSeconds: Int) -> Void) = {}
Now your button actions would look like this.
#objc private func action1() {
checkButtonPressed(30)
}
#objc private func action2() {
checkButtonPressed(45)
}
#objc private func action3() {
checkButtonPressed(60)
}
#objc private func action4() {
checkButtonPressed(90)
}
At the call site, it would look like this -
bV.checkButtonPressed = { [weak self] (numberOfSeconds) in
self?.value = numberOfSeconds
print(numberOfSeconds)
}