I'm working on an iPhone app with custom popup alerts. In the design these alerts all have "Cancel" buttons, but since there is nothing to cancel in these cases, I want to change them to "Okay" buttons.
My question is this: What are the Apple guidelines regarding these button labels? Should it be "Okay" (which is my personal preference), or should it be "OK" (which I don't like because it looks like teen-text-speak or the state abbreviation for Oklahoma).
OK is what Apple uses for settings and their iPhone apps.