Create an instance of MDCButton and theme it with as one of the Material Design button styles using the ButtonThemer extension. Once themed, use the button like you would use a typical UIButton instance.
let button = MDCButton() // Themed as a text button: MDCTextButtonThemer.applyScheme(buttonScheme, to: button)
MDCButton *button = [[MDCButton alloc] init]; // Themed as a text button: [MDCTextButtonThemer applyScheme:buttonScheme toButton:button];
See the ButtonThemer documentation for a full list of supported Material Design button styles.