If you just want to use IPC, make both of your applications recognize any URL scheme. Then call
[[UIApplication sharedApplication] openURL:
[NSURL URLWithString:@"theOtherApp://dataToShare"]];
to send and use -application:handleOpenURL:to receive.
To share lines using cardboard, use
UIPasteboard* board = [UIPasteboard generalPasteboard];
board.string = @"Some string to share";
board.string . - , .
, :
- AddressBook. .
- . . 3.x.
- / .
/var/mobile/Library/AddressBook Keyboard Preferences , . SDK.