UIView width and height adjustment according to it subview programatically - ios

Question

I want to create something like this:
There's a white box under the buttons. If we are using SwiftUI logic, it's vertical padding : 5 and horizontal padding : 10, to create it with SwiftUI is pretty easy, but from what I have learned there is no padding and background color to a UIStackView and to create something like this, you need a UIView then add the stack view on top of the UIView.
This is what I have done so far:
//
// TransaksiViewController.swift
// HaselWiratama
//
// Created by Farhandika on 18/09/21.
// Copyright © 2021 Hasel.id. All rights reserved.
//
import UIKit
class TransaksiViewController: UIViewController {
let pesanButton: BigButton = {
let button = BigButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.backgroundColor = .blue
button.configure(viewModel: MyCustomBigButton(title: "Phone",
imageName: "house", isSystemImage: false))
return button
}()
let ambulanceButton: BigButton = {
let button = BigButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.backgroundColor = .blue
button.configure(viewModel: MyCustomBigButton(title: "Phone",
imageName: "house", isSystemImage: false))
return button
}()
let topStackView: UIStackView = {
let stackView = UIStackView()
stackView.axis = .horizontal
stackView.translatesAutoresizingMaskIntoConstraints = false
stackView.distribution = .fillEqually
stackView.spacing = 10
return stackView
}()
let uiView = UIView()
func configureUIView() {
//Configure the stackview
topStackView.addArrangedSubview(pesanButton)
topStackView.addArrangedSubview(ambulanceButton)
// add stack to UIView
uiView.addSubview(topStackView)
NSLayoutConstraint.activate([
topStackView.heightAnchor.constraint(equalToConstant: 150),
topStackView.centerYAnchor.constraint(equalTo: uiView.centerYAnchor),
topStackView.centerXAnchor.constraint(equalTo: uiView.centerXAnchor)
])
uiView.translatesAutoresizingMaskIntoConstraints = false
uiView.backgroundColor = .purple
}
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .cyan
view.addSubview(uiView)
configureUIView()
NSLayoutConstraint.activate([
uiView.widthAnchor.constraint(equalToConstant: 500),
uiView.heightAnchor.constraint(equalToConstant: 400),
uiView.centerXAnchor.constraint(equalTo: view.centerXAnchor),
uiView.centerYAnchor.constraint(equalTo: view.centerYAnchor)
])
}
}
/* Ignore the button width and height because I have not add the constraint yet */
The result:
As you can see, the width and height of the UIView is not relative to its child view.
How do I emulate the same padding horizontal 10 and vertical 5 in UIView?
(Basically a progressive or responsive width and height of a UIView.)

Answer 1

Since you have mentioned that you used constraints, see the following code. It reflect a UIViewController with what you need:
class ViewController: UIViewController {
// Horizontal Stackview
lazy var stack: UIStackView = {
let view = UIStackView()
view.translatesAutoresizingMaskIntoConstraints = false
view.axis = .horizontal
view.spacing = 10 // Inter-item space
view.backgroundColor = .white
view.distribution = .fillEqually // Setting distribution to fill equally
return view
}()
// Button 1
lazy var button1: UIButton = {
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.setTitle("Button 1", for: .normal)
button.backgroundColor = .red
return button
}()
// Button 2
lazy var button2: UIButton = {
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.setTitle("Button 2", for: .normal)
button.backgroundColor = .blue
return button
}()
// View that holds the stackview
lazy var stackHolder: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
view.backgroundColor = .white
return view
}()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .gray
view.addSubview(stackHolder)
stackHolder.addSubview(stack)
stack.addArrangedSubview(button1)
stack.addArrangedSubview(button2)
//Setting layout constraints
NSLayoutConstraint.activate([
stackHolder.centerXAnchor.constraint(equalTo: view.centerXAnchor),
stackHolder.centerYAnchor.constraint(equalTo: view.centerYAnchor),
// Setting a width and height of the stack so that the `stackHolder` adjust relatively
stack.widthAnchor.constraint(equalToConstant: 250),
stack.heightAnchor.constraint(equalToConstant: 80),
// Setting the constraints with `constant` values for padding
stack.leadingAnchor.constraint(equalTo: stackHolder.leadingAnchor, constant: 5),
stack.trailingAnchor.constraint(equalTo: stackHolder.trailingAnchor, constant: -5),
stack.topAnchor.constraint(equalTo: stackHolder.topAnchor, constant: 10),
stack.bottomAnchor.constraint(equalTo: stackHolder.bottomAnchor, constant: -10),
])
}
}
This will output: