Checkpoint: Building Screens with SwiftUI

Question 1 of 5

• TextField can’t edit Decimal values.
• The parent must call objectWillChange.send().
• SwiftUI only updates parents when the child disappears.
• @State gave the child its own copy; it should be @Binding, with the parent passing a binding.

Question 2 of 5

• Text(total, format: .currency(code: "USD"))
• Text("$\(total)")
• Text(String(describing: total))
• Text("\(total) USD")

Question 3 of 5

• A hidden NavigationLink with isActive: that you toggle.
• Call navigationDestination again with the new expense.
• @State private var path: [Expense] = [], NavigationStack(path: $path), then path.append(saved).
• Present the detail screen with .sheet instead.

Question 4 of 5

• @EnvironmentObject var store: BudgetStore
• @State private var store = BudgetStore()
• @Binding var store: BudgetStore
• @Environment(BudgetStore.self) private var store, then @Bindable var store = store in body.

Question 5 of 5

• Read @Environment(\.dismiss) private var dismiss and call dismiss() after saving.
• Call NavigationStack.pop().
• Set the view’s own isPresented property to false.
• Remove the view from its parent with removeFromSuperview().