4. Assembling Views and Animations
The UIView class and its subclasses populate the iOS device screens. This chapter introduces views from the ground up. You learn how to build, inspect, and break down view hierarchies and understand how views work together. You discover the role geometry plays in creating and placing views into your interface, and you read about animating views so they move and transform onscreen. This chapter covers everything you need to know to work with views from the lowest levels up.
View Hierarchies
A tree-based hierarchy orders what you see on your iOS screen. Starting with the main window, views are laid out in a specifically hierarchical way. All views may have children, called subviews. Each view, including the window, ...
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