How to dismiss fullScreenCover in SwiftUI

A modal presentation (fullScreenCover) is one of the core presentations in iOS. SwiftUI has many ways to dismiss a modal view based on how you structure your view and the minimum iOS version you support.

There are three ways to dismiss a modal in SwiftUI.

1. Dismiss a modal in the same view.
2. Dismiss a modal with @Binding.
3. Dismiss a modal with @Environment.

How to dismiss modal in the same view

If a modal view sits in the same view that presenting it, we can easily dismiss the modal view by controlling the same binding value (isPresented) since it has access to the binding.

struct ContentView: View {
    @State private var isPresented = false

    var body: some View {
        Button("Detail") {
            isPresented = true
        }
        .fullScreenCover(isPresented: $isPresented) {
            // Detail View            
            Button("Back to Main") {
                isPresented = false
            }
        }
    }
}

The detail view Button("Back to Main") can reach isPresented. So, we can easily dismiss it by setting isPresented to false to dismiss the modal.

Most of the time, the view that you want to present might be too complicated to fit within a fullScreenCover closure. So, you probably separate it into another file.

Here we create a new DetailView that we want to present.

struct DetailView: View {
    var body: some View {
        Button("Back to Main") {

        }
    }
}

With a separate view like this, we no longer have access to the isPresented binding.

You have two ways to dismiss a modal view that isn't on the same view.

1. Dismiss a modal with @Binding.
2. Dismiss a modal with @Environment.

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How to dismiss modal with @Binding

One way to dismiss a presented view is to pass the isPresented binding to that view.

In this example, we add an isPresented binding to the DetailView.

struct DetailView: View {
    // 1
    @Binding var isPresented: Bool
    
    var body: some View {
        Button("Back to Main") {
            // 2
            isPresented = false
        }
    }
}

1 The DetailView accept the isPresented binding value.
2 Then, we use it to dismiss the modal.

To use it, we pass an isPresented binding from the presenting view to a modal view.

struct ContentView: View {
    // 1
    @State private var isPresented = false
    
    var body: some View {
        Button("Detail") {
            isPresented = true
        }
        .fullScreenCover(isPresented: $isPresented) {
            // 2
            DetailView(isPresented: $isPresented)
        }
    }
}

We pass down isPresented 1 from the presenting view to presented view, DetailView 2.

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Dismiss a modal with @Environment

The other way for the view to dismiss itself is using environment value via the @Environment property wrapper.

Which environment value to use is depends on the iOS version you supported.

• For iOS 13 and 14, we use presentationMode
• For iOS 15, we use dismiss

How to dismiss modal in iOS 13/14

For a view to dismissing itself, we have to add @Environment(\.presentationMode) var presentationMode to a presented view.

We can dismiss the view by calling presentationMode.wrappedValue.dismiss().

struct DetailView: View {
    @Environment(\.presentationMode) var presentationMode
    
    var body: some View {
        Button("Back to Main") {
            presentationMode.wrappedValue.dismiss()
        }
    }
}

Then we can use DetailView as a modal view without passing anything.

struct ContentView: View {
    @State private var isPresented = false
    
    var body: some View {
        Button("Detail") {
            isPresented = true
        }
        .fullScreenCover(isPresented: $isPresented) {
            DetailView()
        }
    }
}

How to dismiss modal in iOS 15

In iOS 15, Apple deprecated the presentationMode environment value, replacing it with a dismiss action (dismiss).

For a view to dismissing itself, we have to add @Environment(\.dismiss) private var dismiss to a presented view.

We can dismiss the view by calling dismiss().

struct DetailView: View {
    @Environment(\.dismiss) var dismiss
    
    var body: some View {
        Button("Back to Main") {
            dismiss()
        }
    }
}

Then we can use DetailView as a modal view without passing anything.

struct ContentView: View {
    @State private var isPresented = false
    
    var body: some View {
        Button("Detail") {
            isPresented = true
        }
        .fullScreenCover(isPresented: $isPresented) {
            DetailView()
        }
    }
}