How do I see every method called when I run my application in the iPhone Simulator?

Question

I would really like to see every method, delegate, notification, etc. which is called / sent while I run my app in the iPhone Simulator. I thought the righ

Answer 1

Assuming you're sure you want absolutely everything...

1. Breakpoint objc_msgSend and objc_msgSend_stret. Almost all method calls use those two functions (mumble mumble IMP-cacheing).
2. Okay, now your app drops into the debugger all the time. So click the auto-continue box.
3. But now you don't see very much happening, so edit the breakpoints and add the command "bt" to get a backtrace.
4. Drown in debug spam.

This won't catch other C functions, of course.

If you just want to catch notifications, you can do something like this (much less spammy):

+(void)load
{
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleEveryNotification:) name:nil object:nil];
}

+(void)handleEveryNotification:(NSNotification*)notification
{
  CFShow(notification);
}

Of course, notifications are done with normal method calls, so the first method will also show them (albeit in a big pile of spam).

Delegates are not called or sent; they are just normal Obj-C method calls (strictly "message-sends", but that doesn't have the same ring to it).