NSInvalidArgumentException

Question

I get crash from this procedure after adding the sender: (id) so that I can determine which button called it. When configured as a plain old toggleView3, it works great. A crash occurs when the detailView switches back to the docView.

'NSInvalidArgumentException', reason: '*** -[RootViewController toggleView3]: unrecognized selector sent to instance 0x524a00' 2009-04-07 12:29:44.421 eTarot[11405:20b] Stack:

-(IBAction)toggleView3:(id)sender{


    if (detailViewController == nil) {
        [self loadDetailViewController];
    }

    UIView *docView = docViewController.view;
    UIView *detailView = detailViewController.view;

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:1];
    [UIView setAnimationTransition:([docView superview] ? UIViewAnimationTransitionFlipFromRight : UIViewAnimationTransitionFlipFromLeft) forView:self.view cache:YES];

    if ([docView superview] != nil) {
        [detailViewController viewWillAppear:YES];
        [docViewController viewWillDisappear:YES];
        [docView removeFromSuperview];

        [self.view addSubview:detailView];
        [self.view insertSubview:detailNavigationBar aboveSubview:detailView];
        [docViewController viewDidDisappear:YES];
        [detailViewController viewDidAppear:YES];

    } else {
        [docViewController viewWillAppear:YES];
        [detailViewController viewWillDisappear:YES];
        [detailView removeFromSuperview];
        [detailNavigationBar removeFromSuperview];
        [self.view addSubview:docView];
        [detailViewController viewDidDisappear:YES];
        [docViewController viewDidAppear:YES];
    }
    [UIView commitAnimations];
}

Answer 1

You send a message toggleView3when the correct selector name toggleView3:- that is, with a colon and an argument. They may look like you, but they are completely different methods for Objective-C.

Answer 2

, toggleView3 : . , , , .

, , . , .