rtl.swift

import Foundation
import PlaygroundSupport
import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.view.backgroundColor = .white
        
        let stackView = UIStackView()
        stackView.translatesAutoresizingMaskIntoConstraints = false
        stackView.alignment = .center
        stackView.axis = .vertical
        stackView.spacing = 20
        
        let label1 = UILabel()
        label1.text = "مرحبًا. يرجى تسجيل الدخول أدناه للوصول إلى الدورات التدريبية الخاصة بك."
        label1.numberOfLines = 0
        stackView.addArrangedSubview(label1)
        
        let textField = UITextField()
        textField.borderStyle = .roundedRect
        textField.placeholder = "اسم المستخدم"
        stackView.addArrangedSubview(textField)
        
        stackView.addArrangedSubview(UISwitch())
        
        self.view.addSubview(stackView)
        NSLayoutConstraint.activate([
            stackView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 20),
            stackView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: -20),
            stackView.topAnchor.constraint(equalTo: self.view.topAnchor, constant: 20),
            textField.widthAnchor.constraint(equalTo: stackView.widthAnchor),
            textField.heightAnchor.constraint(equalToConstant: 44)
            ])
    }
}


let child = ViewController()
let container = UIViewController()


container.view.addSubview(child.view)
child.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
child.view.frame = container.view.bounds
container.addChild(child)
container.setOverrideTraitCollection(
    UITraitCollection(layoutDirection: .rightToLeft),
//      UITraitCollection(layoutDirection: .leftToRight),
    forChild: child
)

PlaygroundPage.current.liveView = container