PrimitiveButtonStyle.swift

struct ContentView: View {
    let foo: Bool = true
    var body: some View {
        Button(action: {
            print("miao")
        }) {
            Text("Click Me")
        }.buttonStyle(MyButtonStyle())
    }
}

struct MyButtonStyle: PrimitiveButtonStyle {
    func makeBody(configuration: Self.Configuration) -> some View {
        return configuration.label
            .foregroundColor(Color.red)
            .onTapGesture(count: 2) {
                configuration.trigger()
            }
    }
}