Or actually with UITabBarControllerDelegate, and specifically, with the method tabBarController:didSelectViewController:.
According to the docs, the differences:
| OS | called only when tab changes? |
called when changed programmatically? |
|---|---|---|
| before OS 3.0 | YES | YES |
| OS 3.0 and later | NO | NO |
If you are writing code that runs on both 2.x and 3.0 that needs to get tricky with tabs, these changes are a nuisance.
Even more infuriating is that the Apple documentation isn’t complete. The section ends with the sentence fragment “If you are implementing….” Yes? If I am implementing what? And what do I do if I am?
Yes, I’ve already reported documentation error. No response though. My guess is they’ll just remove the sentence fragment instead of expanding on it :(
[edited: I made a mistake in the table the first time I posted this. Should be fixed now.]