Is there a way to tell if your app is being used while the user is on the phone?

Question

There are certain portions of my app that would be better to highlight to the user if they're on the phone.

Is there a call to check to see if we're on the phone? Unfortunately, "call" is a horrible word to check for in API documents for obvious reasons.

Answer 1

Take a look at the difference in size between [[UIScreen mainScreen] bounds] and [[UIScreen mainScreen] applicationFrame]. If the diff is 20 pixels and you aren't hiding the status bar, then the users probably isn't on a call. If the difference is 40 pixels, your users is probably on a call, since the glowing green status bar that appears during calls is about twice as big as the normal status bar.

I haven't done this before, so YMMV. Good luck and let me know if it works!

Answer 2

The CoreTelephony Framework can tell you.

The CTCallCenter currentCalls method returns a set of currently active cellular calls.