DogBreeds is a sample app that uses a very simple UICollectionView created programmatically. It displays all of the dog breeds in the collectionview. And pressing on one of the cells brings up a page with information about the breed. It uses information from api.thedogapi.com.
DogBreeds is licensed under the Unlicense. See the LICENSE file for more information, but basically this is sample code and you can do whatever you want with it.