confirmationDialog(_:isPresented:titleVisibility:actions:message:)

Discussion 議論

In the example below, a button conditionally presents a confirmation dialog depending upon the value of a bound Boolean variable. When the Boolean value is set to true, the system displays a confirmation dialog with a cancel action and a destructive action.

struct ConfirmEraseItems: View {
    @State private var isShowingDialog = false
    var title: String
    var body: some View {
        Button("Empty Trash") {
            isShowingDialog = true
        }
        .confirmationDialog(
            title,
            isPresented: $isShowingDialog
        ) {
            Button("Empty Trash", role: .destructive) {
                // Handle empty trash action.
            }
            Button("Cancel", role: .cancel) {
                isShowingDialog = false
            }
        } message: {
            Text("You cannot undo this action.")
        }
    }
}

All actions in a confirmation dialog will dismiss the dialog after the action runs. The default button will be shown with greater prominence. You can influence the default button by assigning it the defaultAction keyboard shortcut.

The system may reorder the buttons based on their role and prominence.

Dialogs include a standard dismiss action by default. If you provide a button with a role of cancel, that button takes the place of the default dismiss action. You don’t have to dismiss the presentation with the cancel button’s action.