How to customize the display mode of NavigationSplitView
Updated for Xcode 14.2
SwiftUI’s NavigationSplitView has three options to control how sidebars are displayed, each of which can be adjusted using the navigationSplitViewStyle() modifier.
The first is .prominentDetail, which tells SwiftUI you want the detail view to retain its full size at all times – the sidebar and content view will slide over the detail view, rather than pushing it to one side or squeezing it smaller:
struct ContentView: View {
var body: some View {
NavigationSplitView {
Text("Sidebar")
} content: {
Text("Content")
} detail: {
Text("Detail")
}
.navigationSplitViewStyle(.prominentDetail)
}
}
Download this as an Xcode project
The second option is .balanced, which will reduce the size of your detail view as the sidebar or content bar are shown – just switch .prominentDetail to .balanced, like this:
struct ContentView: View {
var body: some View {
NavigationSplitView {
Text("Sidebar")
} content: {
Text("Content")
} detail: {
Text("Detail")
}
.navigationSplitViewStyle(.balanced)
}
} Download this as an Xcode project
The default is .automatic, which will vary according to the platform – at the time of writing, on iPhone it becomes prominentDetail, and on iPad it becomes .balanced.
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