The Core iOS Developer’s Cookbook, Fifth Edition

Recipe: Creating a Circle Layout

Circle layouts offer an eye-catching way to arrange views around a central area, as shown in Figure 10-8. Recipe 10-6 is heavily based on Apple’s sample code, which was first presented at WWDC 2012. This layout provides an excellent introduction to the way items can animate into place upon creation and deletion.

Figure 10-8 This circle layout flow is inspired by sample code provided by Apple and was encouraged by the efforts of developer Greg Hartstein.

Recipe 10-6’s layout flow uses a fixed content size via the collectionViewContentSize method. This prevents collection view scrolling as it creates a layout area ...