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How to add actions to alert buttons

Paul Hudson @twostraws March 11th 2021

Updated for Xcode 12.5

Basic SwiftUI alerts look like this:

Alert(title: Text("Important message"), message: Text("Wear sunscreen"), dismissButton: .default(Text("Got it!")))

However, you will often want to attach actions to buttons to perform specific actions when they are tapped. To do that, attach a closure to your button that will be called when it’s tapped, like this:

struct ContentView: View {
    @State private var showingAlert = false

    var body: some View {
        Button("Show Alert") {
            showingAlert = true
        }
        .alert(isPresented:$showingAlert) {
            Alert(
                title: Text("Are you sure you want to delete this?"),
                message: Text("There is no undo"),
                primaryButton: .destructive(Text("Delete")) {
                    print("Deleting...")
                },
                secondaryButton: .cancel()
            )
        }
    }
}

There is no way to add more than two buttons to an alert – if you’re looking to do that you should use an action sheet instead.