Hour 7. Understanding How Events Are Processed

What You’ll Learn in This Hour: Understanding run loops Understanding Core Foundation and toll-free bridging Starting applications Dispatching events Understanding the UIResponder chain Understanding UIControls

This hour, we’ll study how external events, such as the user touching the screen or a network packet arriving from the Internet, are handled and dispatched by your application. Misunderstanding the run loop is a common source of bugs among beginners. You’ll also learn how touch events are dispatched to the correct UIView to provide user interface elements the user can interact with.