How to intercept or prevent user input in SwiftUI TextField when embedding in UIKit

Hi all,

I’m working on a UIKit app where I embed a SwiftUI TextField using UIHostingController. I’m using an ObservableObject model to drive the textfield content:

class TextFieldModel: ObservableObject {
    @Published var text: String
    @Published var placeholder: String
    @Published var isSecure: Bool
    @Published var isFocused: Bool

    init(pText: String, pPlaceholder: String, pIsSecure: Bool, pIsFocused: Bool) {
        self.text = pText
        self.placeholder = pPlaceholder
        self.isSecure = pIsSecure
        self.isFocused = pIsFocused
    }
}

And my SwiftUI view:

struct TextFieldUI: View {
    @ObservedObject var pModel: TextFieldModel
    @FocusState private var pIsFocusedState: Bool

    var body: some View {
        TextField(pModel.placeholder, text: $pModel.text)
            .focused($pIsFocusedState)
    }
}

I embed it in UIKit like this:

let swiftUIContentView = TextFieldUI(pModel: model)
let hostingController = UIHostingController(rootView: swiftUIContentView)
addChild(hostingController)
view.addSubview(hostingController.view)
hostingController.didMove(toParent: self)

Question:

In UIKit, if I subclass UITextField, I can override insertText(_:) and choose not to call super, effectively preventing the textfield from updating when the user types.

Is there a SwiftUI equivalent to intercept and optionally prevent user input in a TextField, especially when it’s embedded inside UIKit?

What is the recommended approach in SwiftUI for this?