SwiftUI quiz

Test your SwiftUI knowledge with a free interactive quiz — 50 questions with answers and explanations. No signup needed to play.

What protocol does a class need to conform to in order to be used with @StateObject or @ObservedObject?

1. What protocol does a class need to conform to in order to be used with @StateObject or @ObservedObject?
2. What is the basic difference between the implicit .animation(_:value:) modifier and withAnimation?
3. What do VStack, HStack, and ZStack arrange their children as, respectively?
4. What is NavigationStack used for?
5. What does ForEach do inside a SwiftUI view?
6. What is the purpose of .navigationDestination(for:) on a NavigationStack's content?
7. What does Spacer() do inside an HStack or VStack?
8. Why are SwiftUI views typically declared as structs instead of classes?
9. What is .transition() used for on a SwiftUI view?
10. Why does the body property typically have the return type `some View` instead of a concrete type like VStack?
11. What does withAnimation do when wrapped around a state mutation?
12. What replaced NavigationView as the recommended navigation container in modern SwiftUI?

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