Chapter 6 explores interactivity in playgrounds for two major areas:
Working with a playground live view and views that respond to device rotation
Creating and using data entry fields
This chapter explores yet another aspect of interactive views: creating and using gesture recognizers so you can create playgrounds with objects that users can directly manipulate.
All of these examples use views inside a playground live view. In Cocoa and Cocoa Touch, views are not just displays of data—they also respond to events such as device rotation, along with touches in subclasses ...