CapsuleSegmentedControl

CapsuleSegmentedControl.playground

import UIKit
import PlaygroundSupport
// Ref: https://stackoverflow.com/questions/58315497/selectedtintcolor-of-segment-control-is-not-rounded-corner-on-ios-13
class CapsuleSegmentedControl: UISegmentedControl {
    override func layoutSubviews() {
        super.layoutSubviews()
        layer.cornerRadius = self.bounds.size.height / 2.0
        layer.borderColor = UIColor.gray.cgColor
        layer.borderWidth = 1.0
        layer.masksToBounds = true
        clipsToBounds = true
        if #available(iOS 13.0, *) {
            selectedSegmentTintColor = .clear
        } else {
            tintColor = .clear
        }

        for (index, subview) in subviews.enumerated() {
            if ((subviews[index] as? UIImageView) != nil) && index == selectedSegmentIndex {
                subview.backgroundColor = .white
                subview.layer.cornerRadius = subview.bounds.size.height / 2.0
            } else {
                subview.backgroundColor = .clear
            }
        }

    }
    
    
}

class MyViewController : UIViewController {
    override func loadView() {
        let view = UIView()
        view.backgroundColor = .white
        self.view = view
        setUpView()
    }
    
    private func setUpView() {
        
        let segmentedControl = CapsuleSegmentedControl(items: ["One", "Two", "Three"])
        segmentedControl.translatesAutoresizingMaskIntoConstraints = false
        segmentedControl.backgroundColor = UIColor.gray
        view.addSubview(segmentedControl)
        segmentedControl.selectedSegmentIndex = 0
        
        NSLayoutConstraint.activate([
            
            segmentedControl.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 15),
            segmentedControl.topAnchor.constraint(equalTo: view.topAnchor, constant: 44),
            segmentedControl.heightAnchor.constraint(equalToConstant: 31)
        
        ])
    }
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()

![Image](https://user-images.githubusercontent.com/6782228/95784960-1ed86e80-0cd5-11eb-89e6-5d871a902ee1.png)