SwiftUIStoreProvider.swift

import UIKit
import React
import SwiftUI

@objc public class StoreViewProvider: UIView {
  private var props = Props()
  private var hostingController: UIHostingController<SwiftUIStoreView>?
  
  public override func layoutSubviews() {
      super.layoutSubviews()
      setupView()
    }
  
  private func setupView() {
    if self.hostingController != nil {
      return
    }
    
    self.hostingController = UIHostingController(
      rootView: SwiftUIStoreView(
        props: props
      )
    )
    
    if let hostingController = self.hostingController {
      addSubview(hostingController.view)
      hostingController.view.translatesAutoresizingMaskIntoConstraints = false
      hostingController.view.pinEdges(to: self)
      reactAddController(toClosestParent: hostingController)
    }
  }
}

extension UIView {
  func pinEdges(to other: UIView) {
    NSLayoutConstraint.activate([
      leadingAnchor.constraint(equalTo: other.leadingAnchor),
      trailingAnchor.constraint(equalTo: other.trailingAnchor),
      topAnchor.constraint(equalTo: other.topAnchor),
      bottomAnchor.constraint(equalTo: other.bottomAnchor)
    ])
  }
}