title: Include SwiftUI views in existing UIKit application
body: <p>Is is possible to build views with SwiftUI side by side with an existing UIKit application?</p>
  
  <p>I have an existing application written in Objective-C. I've begun migrating to Swift 5. I'm wondering if I can use SwiftUI alongside my existing UIKit .xib views.</p>
  
  <p>That is to say I want some views built with SwiftUI and some other views built with UIKit in the same app. Not mixing the two of course.</p>
  
  <pre><code>SomeObjCSwiftProject/
      SwiftUIViewController.swift
      SwiftUIView.xib
      UIKitViewController.swift
      UIKitView.xib
  </code></pre>
  
  <p>Working alongside each other</p>