ios4 - Checking incoming call in iphone

Question

I have read about the CoreTelephony class and in this CTClass can check caller and find state of call....

But when and how to use this......

I think my application goes to background when call start..
help please or correct me......

Answer 1

It is not possible with the official SDK. The best that you can do is determine if the user is on a call. You can do this by inspecting the size of the status bar frame.

[UIApplication sharedApplication].statusBarFrame