iOS manual keyboard dismissal

SwiftUI_keyboard_dismiss_submit_button_example.swift

struct ContentView: View {
    @State private var tipAmount = ""

    var body: some View {
        VStack {
            TextField("Name: ", text: $tipAmount)
                .textFieldStyle(RoundedBorderTextFieldStyle())
                .keyboardType(.decimalPad)

            Button("Submit") {
                print("Tip: \(self.tipAmount)")
                self.hideKeyboard()
            }
        }
    }
}