Pressing UIButton results in Unrecognized Selector

Question

I have a button in my UIView that is created like so:

UIBarButtonItem *editButton = 
        [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit 
                                                      target:self       
                                                      action:@selector(toggleEdit)];
self.navigationItem.rightBarButtonItem = editButton;
[editButton release];

And this is the action method:

-(void) toggleEdit:(id)sender
{
}

but I get this error

2011-09-02 15:27:13.362 blubb[15006:207] -[DatabaseSelectionViewController toggleEdit]: unrecognized selector sent to instance 0x5a29d80 2011-09-02 15:27:13.365 blubb[15006:207] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[DatabaseSelectionViewController toggleEdit]: unrecognized selector sent to instance 0x5a29d80'

Why is this happening?

Answer 1

For anyone else stumbling across this, you can also receive those "unrecognized selector sent to instance 0x..." errors when you no longer own something and the statement is pointing to some junk address in memory.