I have the following function to get the name of the topmost view controller in my app:

func topMostViewController() -> String {
    guard let rootVC = UIApplication.shared.connectedScenes
        pactMap({ $0 as? UIWindowScene })
        .flatMap({ $0.windows })
        .first(where: { $0.isKeyWindow })?
        .rootViewController else {
        return "Unknown Screen"
    }

    var topVC: UIViewController = rootVC

    while let presentedVC = topVC.presentedViewController {
        topVC = presentedVC
    }

    if let navigationVC = topVC as? UINavigationController, let visibleVC = navigationVC.visibleViewController {
        topVC = visibleVC
    }

    if let tabBarVC = topVC as? UITabBarController, let selectedVC = tabBarVC.selectedViewController {
        topVC = selectedVC
    }

    return String(describing: type(of: topVC))
}

My goal is to obtain the name of the currently visible Screen, whether it’s a UIViewController or a View in SwiftUI. The code works perfectly for UIViewController objects, and I can get their names as expected.

However, when dealing with SwiftUI, the name returned is always UIHostingController<ModifiedContent<AnyView, RootModifier>> . I want to access the name of the SwiftUI view inside the UIHostingController, but I’m not sure how to do this.

For example, if the visible screen is a ContentView in SwiftUI, I want to capture something like "ContentView", not "UIHostingController".

Basically, I want to do something like this:

print(type(of: self)) // ContentView

However, I need to access this information externally, outside of the SwiftUI view itself. This is for an SDK that I am working on. How can I retrieve the name of the SwiftUI view inside the UIHostingController?

I have the following function to get the name of the topmost view controller in my app:

func topMostViewController() -> String {
    guard let rootVC = UIApplication.shared.connectedScenes
        pactMap({ $0 as? UIWindowScene })
        .flatMap({ $0.windows })
        .first(where: { $0.isKeyWindow })?
        .rootViewController else {
        return "Unknown Screen"
    }

    var topVC: UIViewController = rootVC

    while let presentedVC = topVC.presentedViewController {
        topVC = presentedVC
    }

    if let navigationVC = topVC as? UINavigationController, let visibleVC = navigationVC.visibleViewController {
        topVC = visibleVC
    }

    if let tabBarVC = topVC as? UITabBarController, let selectedVC = tabBarVC.selectedViewController {
        topVC = selectedVC
    }

    return String(describing: type(of: topVC))
}

My goal is to obtain the name of the currently visible Screen, whether it’s a UIViewController or a View in SwiftUI. The code works perfectly for UIViewController objects, and I can get their names as expected.

However, when dealing with SwiftUI, the name returned is always UIHostingController<ModifiedContent<AnyView, RootModifier>> . I want to access the name of the SwiftUI view inside the UIHostingController, but I’m not sure how to do this.

For example, if the visible screen is a ContentView in SwiftUI, I want to capture something like "ContentView", not "UIHostingController".

Basically, I want to do something like this:

print(type(of: self)) // ContentView

However, I need to access this information externally, outside of the SwiftUI view itself. This is for an SDK that I am working on. How can I retrieve the name of the SwiftUI view inside the UIHostingController?

• swiftui
• uikit
• screen
• uihostingcontroller

• This is not possible in general unless you also modify the code on the SwiftUI side. Can you accept a solution that also involves adding some identifier to your SwiftUI view? – Sweeper Commented 15 hours ago
• If you have a solution that will cause minimum inconvenience for the person using the SDK, I would be happy to consider it. – Hakan Or Commented 14 hours ago

1 Answer 1

Try this:

import SwiftUI

protocol DescribableViewController {
    associatedtype Content: View
}

extension DescribableViewController {
    var description: String {
        String(describing: Content.self)
    }
}

extension UIHostingController: DescribableViewController { }


func description(for viewController: UIViewController) -> String {
    if let viewController = viewController as? (any DescribableViewController) {
        viewController.description
    } else {
        String(describing: type(of: viewController)) // your code
    }
}

let viewController1 = UIHostingController(rootView: ContentView())
print(description(for: viewController1)) // prints "ContentView"
let viewController2 = UIHostingController(rootView: AnotherView())
print(description(for: viewController2)) // prints "AnotherView"