In this SwiftUI plus Observation code, when… - SwiftUI

SwiftUI

Observation tracking granularity

In this SwiftUI plus Observation code, when only store.count is incremented, select all the views whose body is re-evaluated.

@Observable final class Store { var count = 0; var name = "" }

struct A: View { let store: Store
    var body: some View { Text("\(store.count)") } }
struct B: View { let store: Store
    var body: some View { Text(store.name) } }
struct C: View { let store: Store
    var body: some View { Button("tap") { store.count += 1 } } }
struct D: View { let store: Store
    var body: some View { Text(store.name + " \(store.count)") } }

Pick all that apply

SwiftUIShort answerAdvanced
In SwiftUI, what does the iOS 17 @Observable macro give you over the older ObservableObje…
#observable #observation #performance
SwiftUIShort answerExpert
On a dashboard screen built in SwiftUI, the whole screen stutters on every character type…
#observable #body #performance
SwiftUIShort answerAdvanced
When working with an iOS 17 @Observable class in SwiftUI views, using "who owns it" and "…
#observable #observation
SwiftUIShort answerAdvanced
In iOS 17 SwiftUI, when one property on an @Observable model changes, only some of the vi…
#observable #observation

Up next