self.declarative {
  UIScrollView.vertical {
    UIStackView.vertical {
      UIView()
      UIButton()
      UILabel()
    }
  }
}

dependencies: [
    .package(url: "https://github.com/sakiyamaK/DeclarativeUIKit", .upToNextMajor(from: "0.2"))
]

import UIKit
import DeclarativeUIKit

final class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.view.backgroundColor = .white

        self.declarative {            
            UIScrollView.vertical {
                UIStackView.vertical {

                    UIView()
                      .apply { view in
                          print("命令的に記述も可能")
                          view.tintColor = .black
                          view.isUserInteractionEnabled = true
                      }
                      .size(width: 100, height: 100)
                      .backgroundColor(.red)
                      .transform(.init(rotationAngle: 45.0 / 360 * Double.pi))
                      .cornerRadius(30, maskedCorners: [.layerMinXMinYCorner, .layerMaxXMaxYCorner])
                      .border(color: .blue, width: 10)
                      .customSpacing(40)

                    UIButton()
                        .title("button", for: .normal)
                        .titleColor(.brown, for: .normal)
                        .add(target: self, for: .touchUpInside, { _ in
                            print("タッチアクション")
                        })

                    Array(1 ... 10).compactMap { num in
                        UILabel("\(num)番目のlabel")
                            .textColor(.black)
                            .textAlignment(.center)
                    }

                    UIView.spacer()
                }
                .spacing(20)
            }
        }
    }
}

import SwiftUI

struct DeclarativeViewController_Wrapper: UIViewControllerRepresentable {
    typealias ViewController = DeclarativeViewController

    func makeUIViewController(context: Context) -> ViewController {
        let vc = ViewController()
        return vc
    }
    
    func updateUIViewController(_ vc: ViewController, context: Context) {
    }
}

struct DeclarativeViewController_Previews: PreviewProvider {
    static var previews: some View {
        Group {
            DeclarativeViewController_Wrapper()
        }
    }
}