Where can I find good samples of technical specifications for iOS native development?

Question

Objective-C

Tell me where you can find good examples of terms of reference for developing an application on iOS, not a game. Preferably geolocation or just complex services, generally a great brief for something like a social network application. I would like to know how to describe.
I myself could find only two options for TK for iOS:
1. mobile-testing.ru/tz_kreditniy_kalkulator-_for_avt...
is not impressive 2. good, but not the same subject engexp.ru/files/tech-zadanie-mobile-apps-pek. pdf

Answer 1

have you looked at the official guides?