Transition from any SwiftUI Text view into an inline navigation bar title when the view is scrolled off-screen, as seen in Apple's TV & TestFlight iOS apps.

struct ContentView: View {
    
    @Namespace var namespace
    
    var body: some View {
        NavigationView {
            ScrollView {
                VStack(alignment: .leading) {
                    MatchedTitle("For All Mankind", namespace: namespace) {
                        $0
                            .font(.largeTitle)
                            .fontWeight(.bold)
                            .padding()
                    }

                    // Other content…
                }
            }
            .matchedInlineTitle(in: namespace)
            // Other view modifiers, including `Toolbar` can be used…
        }
    }
}

Naming and namespacing conventions follow Swift's existing .matchedGeometryEffect view modifier.

A MatchedTitle view is initialized with any String, SubString or LocalizedStringKey, using similar parameters to SwiftUI's Text, and it provides optional customisation of the created Text view.

The .matchedInlineTitle modifier must be used on a ScrollView, and enforces a navigation bar title display mode of inline.

• iOS 14.0
• Swift 5.3

This library is released under the MIT license. See the LICENSE file for more information.