Exploring buttons and selectors

UIKit provides a great list of components that you can include in your user interfaces to intercept user input. Most of the UI elements you will see in this section are based on the UIControl class, and their main role is to convert touch events into actions or choices. How the user interacts with a control depends on the type of the control itself.

There are simple buttons that can be tapped to trigger an action, for instance, or controls that accept drag and drop—think sliders or switches—to set a value. Don't worry if you don't find the control that fits your needs. Later in this book (Chapter 8, How to Build Custom Controls, specifically), you will learn how to implement a completely custom control. You'll notice that just as for the default controls, the starting point will be the UIControl class.

UIButton and user interaction

The UIButton class defines generic buttons that intercept the user's tap. You can create different...