CFNotificationCenter

CFNotificationCenter is an object representing a local or remote notification center, which is a singleton object of its type that receives notifications from different sources, and distribute to the listeners.

Look up all observers of the local center

You can get the dictionary of all observers in the local center by

CFNotificationCenterRef center = CFNotificationCenterGetLocalCenter();
CFDictionaryRef dict = *(CFDictionaryRef*)(center + 4);
CFShow(dict);

References

• Official reference: http://developer.apple.com/iphone/library/documentation/CoreFoundation/Reference/CFNotificationCenterRef/Reference/reference.html