A UIViewController that present React Native application

ReactViewController.swift

import UIKit
import React

@objc(ReactViewController)
public class ReactViewController: UIViewController {

    var moduleName: String = ""
    var jsFileName: String = ""
    var isDebug: Bool = false
    var showNavigationBar: Bool = true
    var bundle: Bundle = Bundle.main
    var oldNavigationBarVisibility: Bool = false
    var props: [String: Any]  = [:]

    static var callback: (() -> Void)?

    override public func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        oldNavigationBarVisibility = self.navigationController?.isNavigationBarHidden ?? false
        self.navigationController?.setNavigationBarHidden(!showNavigationBar, animated: animated)
    }

    override public func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        self.navigationController?.setNavigationBarHidden(oldNavigationBarVisibility, animated: animated)
    }


    public convenience init(moduleName: String?,
                            jsFileName: String?,
                            bundle: Bundle?,
                            isDebug: Bool = false,
                            showNavigationBar: Bool?,
                            props: [String: Any]?,
                            callback: (() -> Void)? = nil) {
        self.init()
        if let name = moduleName {
            self.moduleName = name
        }
        if let bundle = bundle {
            self.bundle = bundle
        }
        if let name = jsFileName {
            self.jsFileName = name
        }

        if let props = props {
            self.props = props
        }
        if let showNavigationBar = showNavigationBar {
            self.showNavigationBar = showNavigationBar
        }
        self.isDebug = isDebug
        ReactViewController.callback = callback
    }

    @objc func dismissReactView() {
        DispatchQueue.main.async {
            ReactViewController.callback?()
        }
    }

}

extension ReactViewController: RCTBridgeDelegate {
    public override func loadView() {

        if (!isDebug) {
            let bridge = RCTBridge.init(delegate: self, launchOptions: [:])
            self.view = RCTRootView(bridge: bridge, moduleName: self.moduleName, initialProperties: self.props)
        } else {
            let url = RCTBundleURLProvider.sharedSettings().jsBundleURL(forBundleRoot: "index", fallbackResource: nil)
            self.view = RCTRootView(bundleURL: url, moduleName: self.moduleName, initialProperties: self.props, launchOptions: nil)
        }
    }

    public func sourceURL(for bridge: RCTBridge!) -> URL! {
        return self.bundle.url(forResource: self.jsFileName, withExtension: "jsbundle")
    }

}