Im' trying to put a NSPageController in a SwiftUI NSViewControllerRepresentable programatically, but when the app runs, it crashes with the following error:
-[NSNib _initWithNibNamed:bundle:options:] could not load the nibName: test.PageController in bundle (null).
This is the smallest example I could think off to demonstrate the problem:
PageView:
struct PageView: NSViewControllerRepresentable {
let data = ["green", "blue", "red"]
typealias NSViewControllerType = PageController
func makeNSViewController(context: Context) -> PageController {
let pageController = PageController()
pageController.arrangedObjects = data
pageController.delegate = pageController
return pageController
}
func updateNSViewController(_ nsViewController: PageController, context: Context) {
}
}
PageController:
class PageController: NSPageController, NSPageControllerDelegate {
func pageController(_ pageController: NSPageController, identifierFor object: Any) -> NSPageController.ObjectIdentifier {
return (object as? String) ?? "green"
}
func pageController(_ pageController: NSPageController, viewControllerForIdentifier identifier: NSPageController.ObjectIdentifier) -> NSViewController {
let rootView: Color
switch identifier {
case "green":
rootView = .green
case "red":
rootView = .red
default:
rootView = .blue
}
return NSHostingController(rootView: rootView)
}
}
So far I tried creating custom initialisers that call super.init(nibName: nil, bundle: nil) on NSPageController, but that didn't work either. Ive also tried overwriting 'loadView', but I still didn't get it to work.
I did find that the app crashes in the loadView call of the NSPageController inside the makeNSViewController call.
The convenience initializer for NSViewControllers by default try to load their views from nib.
You need to override loadView and actually supply a view to the Page Controller
override func loadView() {
self.view = NSView() // the view being controlled
}