Question

What is the best way to debug MobileSubstrate extensions, i.e. placing breakpoints etc.? Is there away to do this in Xcode? GNU Debugger?

Answer 1

#define Debugger() { kill( getpid(), SIGINT ) ; }

Then you just call Debugger() wherever you want to place a breakpoint.

You can also raise an exception if you want to trace the stack:

[NSException raise:@"Exception Message" format:formatString];