How to dismiss SwiftUI View and also presenting SwiftUI View from one button in presented SwiftUI view

Question

I have a swiftUI view that is presented using a hostingController:

let hostingController = UIHostingController(rootView: FirstView)
 someVC.present(hostingController, animated: true)

The FirstView in turn presents a second SwiftUI view using .sheet(IsPresented with a boolean to determine whether it should be displayed as follows:

struct FirstView: View {
    @Environment(\.presentationMode) var presentationMode

    @State var showSecondView = false
//change showSecondView to true so it displays as a sheet

 .sheet(isPresented: $showSecondView) {
                SecondView() 
            }
}

In SecondView, I have a button that I would like to use to dismiss both the SecondView and the FirstView as well. It dismisses the SecondView but I can't figure out how to dismiss the FirstView as well this since the FirstView was presented in a hosting controller not using a boolean.

If the SecondView was say an Alert within the First View, then I could use the environmental varialbe presentationMode to dismiss, however, that variable does not seem to be accessible from SecondView.

 struct SecondView: View {
        @Environment(\.dismiss) var dismiss
    
    
    Button("OK") {
//THIS DOES NOT WORK BECAUSE presentationMode is out of scope
                presentationMode.wrappedValue.dismiss()
  
                dismiss()//
            }
    }

How can I dismiss not only the current (or Second) sheet but also the presenting (or First view) which was presented in a hostingController?

malhal · Accepted Answer · 2025-04-29 18:33:30Z

1

Sometimes you would pass an action closure, e.g.

 .sheet(isPresented: $showSecondView) {
    SecondView {
        showSecondView = false
    }
}

struct SecondView: View {
    let action: () -> ()
    
    ..    

    Button("OK") {
        action()
    }

And sometimes the closure contains some data you want to pass back, e.g.

struct SecondView: View {
    @State var text = ""
    let action: (String) -> ()
    
    ..    

    Button("OK") {
        action(text)
    }

You can use the same technique to call back into UIKit when you init the root view for the hosting controller.

answered Apr 29 at 18:33

malhal

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4 Comments

user6631314 Apr 29 at 21:59

This makes sense. Are you suggesting I pass the secondView the presentationMode from the firstView which seems able to dismiss the original VC? I will try that

user6631314 Apr 29 at 22:05

Is there a straightforward way to pass the varible presentationMode to the secondView?

malhal Apr 29 at 22:22

no need to use presentationMode at all

user6631314 Apr 29 at 22:37

There may be a better way but I got it to work with the presentationMode variable. I passed it as SecondView(presentationMode: self.presentationMode). It is accepted in SecondView using @Binding var presentationMode: PresentationMode. Finally I called it using $presentationMode.wrappedValue.dismiss()

Débora Lage · Accepted Answer · 2025-04-29 21:42:57Z

SecondView is created as a SwiftUI view sheet - it is managed internally by SwiftUI and can be dismissed using @Environment(\.dismiss).

But the FirstView is hosted via UIKit (UIHostingController), so it must be dismissed via UIKit (someVC.dismiss(...)), which cannot be done automatically from within a deeply nested SwiftUI view without a bridge.

Here's a suggestion:

Let's create an ObservableObject so that we can use it with a similar approach of managing environment objects:

class DismissController: ObservableObject {

    let dismissSubject = PassthroughSubject<Void, Never>()

    func dismiss() {
        dismissSubject.send()
    }
}

Add that to the view that will be addded to the UIHostingController:

let dismissController = DismissController()

dismissController.dismissSubject
    .sink { [weak self] in
        self?.dismiss(animated: true)
    }
    .store(in: &cancellables) // Ensure you manage subscriptions
    // e.g. var cancellables = Set<AnyCancellable>()
let rootView = FirstView()
    .environmentObject(dismissController) // environmentObject is being created here

let hostingController = UIHostingController(rootView: rootView)
present(hostingController, animated: true)

Make a reference to the environment object and perform the dismiss method where you desire:

struct SecondView: View {
    @Environment(\.dismiss) var dismiss
    @EnvironmentObject var dismissController: DismissController

    // ...
    Button("OK") {
        dismiss() // Dismiss the SwiftUI sheet
        dismissController.dismiss() // Trigger dismissal of the hosting controller
    }
}

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