UIPageControl not visible in iOS 14

if UIPageControl not visible in iOS 14 then simply add a width constraint and assign relation "greater that or equal" or make increase width of UIPageControl.

UIPageControl works a little differently in iOS 14. It might be surprising that it does not show anything if the width is too small.

import UIKit

class ViewController: UIViewController {
    
    lazy var label: UILabel = UILabel()
    var widthConstraint: NSLayoutConstraint!

    override func viewDidLoad() {
        super.viewDidLoad()

        let pageControl = UIPageControl()
        pageControl.numberOfPages = 10
        pageControl.currentPage = 3
        pageControl.pageIndicatorTintColor = .red
        pageControl.currentPageIndicatorTintColor = .green
        pageControl.layer.borderWidth = 1
        pageControl.layer.borderColor = UIColor.purple.cgColor
        widthConstraint = pageControl.widthAnchor.constraint(equalToConstant: 100)
        widthConstraint.isActive = true
        
        let slider = UISlider()
        slider.minimumValue = 0
        slider.maximumValue = 300
        slider.value = 100
        slider.widthAnchor.constraint(equalToConstant: 200).isActive = true
        slider.addTarget(self, action: #selector(sliderValueDidChange(_:)), for: .valueChanged)
        
        let stackView = UIStackView(arrangedSubviews: [label, pageControl, slider])
        stackView.axis = .vertical
        stackView.alignment = .center
        stackView.spacing = 40
        
        view.addSubview(stackView)
        stackView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            stackView.centerYAnchor.constraint(equalTo: view.centerYAnchor),
            stackView.widthAnchor.constraint(equalTo: view.widthAnchor)
        ])
        
        updateLabel()
    }


    @objc
    func sliderValueDidChange(_ sender: Any?) {
        guard let slider = sender as? UISlider else { return }
        widthConstraint.constant = CGFloat(slider.value)
        updateLabel()
    }
    
    func updateLabel() {
        if #available(iOS 14.0, *) {
            label.text = "iOS 14 PageControl width: \(widthConstraint.constant.rounded())"
        } else {
            label.text = "iOS 13 PageControl width: \(widthConstraint.constant.rounded())"
        }
    }
}