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Re: how to debug notification that's never received?
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Re: how to debug notification that's never received?


  • Subject: Re: how to debug notification that's never received?
  • From: Jonathan del Strother <email@hidden>
  • Date: Sat, 4 Mar 2006 10:58:50 +0000


On 3 Mar 2006, at 21:17, Matt Neuburg wrote:

In class A, I post a notification. I know from logging that the posting code
is being executed.


In class B, I've registered to receive that notification, but it never
arrives.

I've double-checked the registration, dicking with the notification name and
all sorts of things, but I can't make the notification arrive.


In the end, after about two hours of dicking around, I simply threw up my
hands and solved the problem a different way. I never figured out what the
problem was! So how might I have debugged this? Is there a way to dig into
the internals of the notification center and see who is registered to
receive what, and to find out exactly what happens when the notification is
posted? m.

You could tell gdb to print out notifications every time they're sent.
Go to the Breakpoints window, add a new breakpoint on - [NSNotificationCenter postNotificationName:object:userInfo:]
Add a debugger command 'po $r5', and tick the Continue column (far right)


This will print notificationName to the gdb console every time a notification is posted.

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References: 
 >how to debug notification that's never received? (From: Matt Neuburg <email@hidden>)

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