UIStackView test

MyViewController.swift

import UIKit
import PlaygroundSupport

class MyViewController : UIViewController {

    override func viewDidLoad() {
        view.backgroundColor = .white
        let s1 = generateLabel()
        let s2 = generateLabel()
        let s3 = generateLabel()
        let sv = UIStackView(frame: .zero)
        sv.axis = .horizontal
        sv.alignment = .center
        sv.distribution = .fillEqually
        sv.spacing = 20
        sv.frame = CGRect(x: 0, y: 0, width: self.view.frame.width, height: 100)
        sv.center = self.view.center
        sv.addArrangedSubview(s1)
        sv.addArrangedSubview(s2)
        sv.addArrangedSubview(s3)
        self.view.addSubview(sv)
    }

    var counter:Int = 0
    let colors:[UIColor] = [UIColor.red, UIColor.blue, UIColor.yellow]

    func generateShape () -> CAShapeLayer {
        let shape = CAShapeLayer()
        shape.backgroundColor = colors[counter % 3].cgColor
        counter = counter + 1
        shape.frame = CGRect(x: 0, y: 0, width: 200, height: 50)
        shape.position = CGPoint(x:view.frame.width / 2, y:view.frame.height / 2)
        
        let label = UILabel()
        label.frame = CGRect(x:0,y:0, width: 200, height: 20)
        label.center = CGPoint(x: shape.frame.width / 2, y: shape.frame.height/2)
        label.text = "This is \(counter)"
        label.textColor = .black
        label.textAlignment = .center
        shape.addSublayer(label.layer)
        return shape
    }
    func generateLabel () -> UILabel {
        let label = UILabel()
        counter = counter + 1
        label.backgroundColor = colors[counter % 3]
        label.frame = CGRect(x:0,y:0, width: 200, height: 20)
        label.text = "This is \(counter)"
        label.textColor = .black
        label.textAlignment = .center
        return label
    }
}

PlaygroundPage.current.liveView = MyViewController()