unrecognized selector sent to instance - ios

Question

I am trying to get a pop up menu on iPhone.
The main app is using storyboard, but the pop up is a separate xib file that I load:
menu = [[UIViewController alloc] initWithNibName:#"SimpleMenuController" bundle:nil];
[self.view addSubview:menu.view];
and I slide it in and out with animation when pressing a button.
that works fine, but I get a problem when I try to press a button inside that pop up menu
I get the following error:
Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: '-[UIViewController PressCategory:]:
unrecognized selector sent to instance 0x8d3c040'
I have connected the button to PressCategory function
I have connected the view to the file owner.
What I have noticed is that my ViewController is called SimpleMenuViewController, that is where the PressCategory function is, so of course it will not find the selector. But I don't know what I am doing wrong in connecting in the xib file.

Answer 1

Change your code to:
menu = [[SimpleMenuViewController alloc] initWithNibName:#"SimpleMenuController" bundle:nil];
so that you're instantiating the correct class.

Answer 2

Do you have PressCategory function in your SimpleMenuViewController?
If yes, then check weather its parameterized or not.
Declare function in .h file like this:
-(IBAction)PressCategory:(UIButton *)sender;
Define it in .m file like this:
-(IBAction)PressCategory:(UIButton *)sender {
// write your code here
}