The Core iOS Developer’s Cookbook, Fifth Edition

The Layout

Figure 10-8 shows the layout that Recipe 10-6 builds. As users add new items, the circle grows more crowded, up to a maximum count of 20 items on the iPad and 8 on the iPhone. You can easily modify these limits in the add and delete methods to match the view sizes for your particular application.

Recipe 10-6 Laying Out Views in a Circle

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@implementation CircleLayout {     NSInteger numberOfItems;     CGPoint centerPoint;     CGFloat radius;     NSMutableArray *insertedIndexPaths;     NSMutableArray *deletedIndexPaths; } // Calculate and save off the current state - (void)prepareLayout {     [super prepareLayout];     CGSize size = self.collectionView.frame.size;     numberOfItems =         [self.collectionView ...