Hosting Controller When Using iOS 14 @main

by

Here is a possible approach (tested with Xcode 12 / iOS 14)… but if you intend to use UIKit features heavily it is better to use UIKit Life-Cycle, as it gives more flexibility to configure UIKit part.

struct ContentView: View {

    var body: some View {
      Text("Demo Root Controller access")
        .withHostingWindow { window in
            if let controller = window?.rootViewController {
                // .. do something with root view controller
            }
        }
    }
}

extension View {
    func withHostingWindow(_ callback: @escaping (UIWindow?) -> Void) -> some View {
        self.background(HostingWindowFinder(callback: callback))
    }
}

struct HostingWindowFinder: UIViewRepresentable {
    var callback: (UIWindow?) -> ()

    func makeUIView(context: Context) -> UIView {
        let view = UIView()
        DispatchQueue.main.async { [weak view] in
            self.callback(view?.window)
        }
        return view
    }

    func updateUIView(_ uiView: UIView, context: Context) {
    }
}

More Related Contents:

  1. SwiftUI View: Int/Double is not convertible to CGFloat
  2. How do I add Animations to Transitons between custom NavigationItems made from AnyView?
  3. SwiftUI TextField with formatter not working?
  4. Are there maximum limits to VStack?
  5. How to create TextField that only accepts numbers
  6. SwiftUI – Get size of child?
  7. Not Receiving scenePhase Changes
  8. Calling functions from UIViewController in SwiftUI
  9. SwiftUI: Switch .sheet on enum, does not work
  10. SwiftUI disable list border iOS 14 [duplicate]
  11. Activity indicator in SwiftUI
  12. Why is an ObservedObject array not updated in my SwiftUI application?
  13. SwiftUI Picker onChange or equivalent?
  14. SwiftUI @State and .sheet() ios13 vs ios14
  15. How to use same set of modifiers for various shapes
  16. SwiftUI Repaint View Components on Device Rotation
  17. How to print() to Xcode console in SwiftUI?
  18. SwiftUI: Random “Extra argument in call” error
  19. TabView with “PageTabViewStyle” does not update it’s content when @State var changes
  20. How to set custom highlighted state of SwiftUI Button
  21. How to create a custom delete button without using the slide to delete that comes with swiftUI I am not using list, just using a foreach loop
  22. How do I get the ScrollView to keep its position when the keyboard appears with iOS 15/Xcode 13?
  23. Adding a drag gesture in SwiftUI to a View inside a ScrollView blocks the scrolling
  24. How to detect keyboard events in SwiftUI on macOS?
  25. SwiftUI – PresentationButton with modal that is full screen
  26. Show a new View from Button press Swift UI
  27. How to detect Light\Dark mode change in iOS 13?
  28. Change to @Published var in @EnvironmentObject not reflected immediately
  29. How do I make a clickable pin in SwiftUI’s new Map view?
  30. NavigationStack not affected by EnvironmentObject changes

Leave a Comment