We recently migrated our app to use NavigationSplitView on iPad with a sidebar and detail setup, and we got reports that the navigation buttons on the sidebar disappear when returning to our app after using a different app. I reproduced the issue from a new empty project with the following code (issue tested on iOS 17.4 and iOS 18.3, was not able to reproduce on iOS 16.4):
import SwiftUI
@main
struct TestApp: App {
var body: some Scene {
WindowGroup {
NavigationSplitView {
Text("sidebar")
.toolbar {
ToolbarItem(placement: .topBarLeading) {
Button(action: {}) {
Image(systemName: "square.and.arrow.down")
}
}
ToolbarItem(placement: .topBarTrailing) {
Button(action: {}) {
Image(systemName: "square.and.arrow.up")
}
}
}
} detail: {
Text("detail")
.toolbar {
ToolbarItem(placement: .topBarLeading) {
Button(action: {}) {
Image(systemName: "eraser")
}
}
ToolbarItem(placement: .topBarTrailing) {
Button(action: {}) {
Image(systemName: "pencil")
}
}
}
}
}
}
}
Please check the following GIF for the simple steps, notice how the navbar buttons in the detail view do not disappear:
Here's the console output, it shows that the constraints break internally:
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