NavigationStack (iOS 16+) ni container ya navigation ya SwiftUI inayoendeshwa na data: badala ya kusukuma view controllers kiimperative, unaunganisha array path ya thamani, na stack hurender skrini kwa kila thamani. Data hutiririka chini kupitia view initializers na environment, na juu kupitia bindings na callbacks.
Unaendesha navigation kwa kubadilisha @State path, na kuunganisha value types na destination views kwa kutumia navigationDestination.
struct AppView: View {
@State private var path: [Route] = [] // the navigation stack, as data
var body: some View {
NavigationStack(path: $path) {
List(products) { p in
NavigationLink("Open", value: Route.detail(p.id)) // append value
}
.navigationDestination(for: Route.self) { route in
switch route {
case .detail(let id): DetailView(id: id)
}
}
}
}
}
enum Route: Hashable { case detail(Int) }
Kwa sababu path ni data ya kawaida, unaweza deep-link kwa kuweka path = [.detail(42)], au pop hadi root kwa path.removeAll() — navigation inakuwa state inayoweza kupimwa na kuseri (serializable).
DetailView(id:)), au shiriki objects za pamoja kwa .environmentObject(...) / mfumo wa @Environment.@Binding au huita closure aliyoipa parent.Hashable.navigationDestination; usajili mwingi kwa type ile ile hugongana.Navigation inayoendeshwa na data hufanya flows kama deep links, restoration, na "rudi skrini tatu nyuma" kuwa rahisi kwa sababu stack ni array tu unayoimiliki. Wahojaji huuliza hili kuona kama unatengeneza navigation kama state — njia ya kisasa ya SwiftUI — badala ya kupambana na NavigationView ya zamani ya kiimperative.
Maktaba ya maswali ya mahojiano ya IT yenye majibu ya kina — kutoka Junior hadi Senior.
Changia