[Solved] Consider this SwiftUI code snippet: struct ContentView: View { @State private var count = 0 var body: some View { VStack { Text("Count:... | iOS Swift

iOS Swift - State Management in SwiftUI

Consider this SwiftUI code snippet:

struct ContentView: View {
  @State private var count = 0
  var body: some View {
    VStack {
      Text("Count: \(count)")
      Button("Add") {
        count += 1
      }
    }
  }
}

What happens when the "Add" button is tapped?

AThe app crashes because count is private

BThe count increases but the Text does not update

CThe count increases by 1 and the Text updates to show the new count

DNothing happens because @State variables cannot change

Step-by-Step Solution

Solution:

Step 1: Understand @State behavior on change
When the button increments count, the @State variable changes.
Step 2: UI updates automatically
SwiftUI detects the change and refreshes the Text to show the new count value.
Final Answer:
The count increases by 1 and the Text updates to show the new count -> Option C
Quick Check:
@State change triggers UI update = C [OK]

Quick Trick: @State changes always refresh the UI automatically [OK]

Common Mistakes:

Thinking private stops UI updates
Assuming UI won't refresh on state change
Believing @State variables are immutable

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More iOS Swift Quizzes

Consider this SwiftUI code snippet:

Step 1: Understand @State behavior on change

Step 2: UI updates automatically

Final Answer:

Quick Check:

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