antigravity-skills-reference/skills/swiftui-ui-patterns/references/input-toolbar.md

Input toolbar (bottom anchored)

Intent

Use a bottom-anchored input bar for chat, composer, or quick actions without fighting the keyboard.

Core patterns

• Use .safeAreaInset(edge: .bottom) to anchor the toolbar above the keyboard.
• Keep the main content in a ScrollView or List.
• Drive focus with @FocusState and set initial focus when needed.
• Avoid embedding the input bar inside the scroll content; keep it separate.

Example: scroll view + bottom input

@MainActor
struct ConversationView: View {
  @FocusState private var isInputFocused: Bool

  var body: some View {
    ScrollViewReader { _ in
      ScrollView {
        LazyVStack {
          ForEach(messages) { message in
            MessageRow(message: message)
          }
        }
        .padding(.horizontal, .layoutPadding)
      }
      .safeAreaInset(edge: .bottom) {
        InputBar(text: $draft)
          .focused($isInputFocused)
      }
      .scrollDismissesKeyboard(.interactively)
      .onAppear { isInputFocused = true }
    }
  }
}

Design choices to keep

• Keep the input bar visually separated from the scrollable content.
• Use .scrollDismissesKeyboard(.interactively) for chat-like screens.
• Ensure send actions are reachable via keyboard return or a clear button.

Pitfalls

• Avoid placing the input view inside the scroll stack; it will jump with content.
• Avoid nested scroll views that fight for drag gestures.