Builder Pattern

Builder.swift

protocol Builder {
    typealias Handler = (inout Self) -> Void
}

extension NSObject: Builder {}

extension Builder {
    public func with(_ configure: Handler) -> Self {
        var this = self
        configure(&this)

        return this
    }
}

extension Builder where Self: UIView {
    func usingAutoLayout() -> Self {
        self.translatesAutoresizingMaskIntoConstraints = false

        return self
    }

    func userInteractionDisabled() -> Self {
        self.isUserInteractionEnabled = false

        return self
    }

    func userInteractionEnabled() -> Self {
        self.isUserInteractionEnabled = true

        return self
    }
}

Example.swift

import UIKit
import PlaygroundSupport

class MyViewController : UIViewController {
    override func loadView() {
        let view = UIView()
        view.backgroundColor = .white

        // Without usgin builder
        let label = UILabel()
        label.frame = CGRect(x: 150, y: 200, width: 200, height: 20)
        label.text = "Hello World!"
        label.textColor = .black

        // With builder
        let label2 = UILabel()
            .usingAutoLayout()
            .userInteractionDisabled()
            .with() {
                $0.text = "Label"
                $0.textColor = .blue
        }
        
        view.addSubview(label)
        view.addSubview(label2)

        NSLayoutConstraint.activate([
            label2.topAnchor.constraint(equalTo: label.bottomAnchor, constant: 8),
            label2.centerXAnchor.constraint(equalTo: view.centerXAnchor)
        ])
        self.view = view
    }
}

// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()