Don’t you just hate it when you finally get your program linking, you run it, and instead of seeing your glorious code executing away you get something like this?
2008-11-13 21:12:25.866 Play MPE[1369:20b] * -[PMPELoginViewController loginSucceeded:]: unrecognized selector sent to instance 0x40d560
2008-11-13 21:12:25.867 Play MPE[1369:20b] * Terminating app due to uncaught exception
Most annoying, that. So what can you do to catch that kind of nonsense in the act? Or other runtime failures?
Well, the Breakpoints window in Xcode (Run > Show > Breakpoints) is your friend. Simply add these project or global breakpoints:
and then hey presto, the debugger comes up stopped on the source line, in this case
Much easier to debug, that!
[EDIT: And here’s some others you might try as well: