Put a transparent NSWindow permanently on top of another NSWindow

Question

I want to have some UI controls on top of a NSWebView and because of this problem \" https://stackoverflow.com/questions/9120868/video-in-nswebview-hides-views-

Answer 1

Swift 3 version using window controller:

final class OverlayWindowController: NSWindowController {
  init(frame: NSRect) {
    let window = NSWindow(contentRect: frame, styleMask: .borderless, backing: .buffered, defer: false)
    super.init(window: window)

    window.contentViewController = MyViewController()
    window.backgroundColor = NSColor.clear
    window.isOpaque = false
  }

  @available(*, unavailable)
  required init?(coder: NSCoder) {
    fatalError("init(coder:) is unavailable")
  }
}