Setting background color for customView has no effect - ios

Question

I have a customView which I display by after a button-tap. My problem is that setting .backgroundColor has no effect and it is just a clear background.
CustomView:
let wishWishView: WishStackView = {
let v = WishStackView()
v.backgroundColor = .cyan
v.translatesAutoresizingMaskIntoConstraints = false
return v
}()
AddViewButton:
#objc func addWishButtonTapped(){
self.view.addSubview(self.wishWishView)
wishWishView.centerYAnchor.constraint(equalTo: self.view.centerYAnchor).isActive = true
wishWishView.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true
}
WishWishView is just a simple UIView with a StackView inside of it.

Answer 1

My guess would be that it is a UIStackView, which does not support having a background color.
You can read more about why this happens, and possible workarounds here: https://stackoverflow.com/a/34868367/3992237

Answer 2

Your code is Totally wrong, first you set your view like this:
let wishWishView: UIView = {
let v = UIView()
v.backgroundColor = .cyan
v.translatesAutoresizingMaskIntoConstraints = false
return v
}()
now set your stackView, in my example I put in 2 label in vertical axis:
let stackView: UIStackView = {
let label1 = UILabel()
label1.text = "Label 1"
label1.textColor = .red
label1.font = UIFont.systemFont(ofSize: 16)
let label2 = UILabel()
label2.text = "Label 2"
label2.textColor = .black
label2.font = UIFont.systemFont(ofSize: 16)
let sV = UIStackView(arrangedSubviews: [label1, label2])
sV.axis = .vertical
sV.distribution = .fillEqually
sV.translatesAutoresizingMaskIntoConstraints = false
return sV
}()
after that set your button:
let buttonAddView: UIButton = {
let button = UIButton(type: .system)
button.setTitle("Add View", for: .normal)
button.setTitleColor(.white, for: .normal)
button.backgroundColor = .red
button.addTarget(self, action: #selector(addWishButtonTapped), for: .touchUpInside)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
in viewDidLoad add button and set constraints
view.addSubview(buttonAddView)
buttonAddView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 20).isActive = true
buttonAddView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: -20).isActive = true
buttonAddView.heightAnchor.constraint(equalToConstant: 50).isActive = true
buttonAddView.widthAnchor.constraint(equalToConstant: 120).isActive = true
now write the function that add the view with stack view inside when the button is tapped with right constraints, in your function you call only the position of the view but not the size of it. Write your function like this:
#objc func addWishButtonTapped(){
view.addSubview(self.wishWishView)
wishWishView.centerYAnchor.constraint(equalTo: self.view.centerYAnchor).isActive = true
wishWishView.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true
wishWishView.heightAnchor.constraint(equalToConstant: 100).isActive = true
wishWishView.widthAnchor.constraint(equalToConstant: 200).isActive = true
wishWishView.addSubview(stackView)
stackView.topAnchor.constraint(equalTo: wishWishView.topAnchor).isActive = true
stackView.bottomAnchor.constraint(equalTo: wishWishView.bottomAnchor).isActive = true
stackView.leadingAnchor.constraint(equalTo: wishWishView.leadingAnchor, constant: 10).isActive = true
stackView.trailingAnchor.constraint(equalTo: wishWishView.trailingAnchor, constant: -10).isActive = true
}
Now simply change background of the wishWishView to automatically set stackView background, and that's it...