Haha, it's about design patterns, not actual patterns ;) Patterns, as in "What kind of elements or techniques did others use in order to achieve x?", not as in seamless images .

pttrns.com for example shows you how iOS designers used various ways to present typical mobile screens - like a login screen or a news feed. It's a good place to get inspiration as well as to see best practices.

Aw man, I actually thought you posted this on purpose. Anyway, I thought it was a great joke.