Problem with UIBarButtonItem

Question

Level 1

8 points

Problem with UIBarButtonItem

Im having a problem trying to get my home button UIBarButtonItem back to my initial ViewController.

I have this code within the viewDidLoad method:

// Create a home button

UIBarButtonItem *homeButton = [[UIBarButtonItemalloc] initWithTitle:@"Home"style:UIBarButtonItemStylePlaintarget:selfaction:@selector(goHome:)];

[self.navigationItemsetLeftBarButtonItem:homeButton animated:NO];

// Go to home page

- (void) goHome {

ViewController *view1 = [[ViewControlleralloc]initWithNibName:@"ViewController"bundle:nil];

[selfpresentViewController:view1 animated:YEScompletion:nil];

}

When I try and invoke the function goHome by clicking the button, I get NSInvalidArgumentException

Thanks in advance 🙂

Posted on Apr 7, 2013 12:54 PM

Reply

Answer 1

xnav

Level 5

7,113 points

Apr 7, 2013 5:04 PM in response to Daz1761

Your goHome method takes no parameters, try removing the colon(:).

action:@selector(goHome)];

instead of

action:@selector(goHome:)];

Reply

Answer 2

Daz1761 Author

Level 1

8 points

Apr 8, 2013 4:45 AM in response to xnav

Thanks 🙂

That worked perfectly!

Is there a more efficient way of getting back to my first initial ViewController without making an instantiated copy again of my ViewController class as its already being instantiated within the appDelegate.

My initial ViewController navigates to my ViewControllerSecond via a round rect button. My ViewControllerSecond is nested within a UINavigationController and its this UINavigationController that has my Home Button within.

Many thanks!

Reply

Answer 3

xnav

Level 5

7,113 points

Apr 8, 2013 8:18 AM in response to Daz1761

Right, you really don't want to do this, you want to return to the original instance of the VC. There are scads of examples from Apple and the Web in general on how to do it.

Reply

Answer 4

Daz1761 Author

Level 1

8 points

Apr 8, 2013 9:57 AM in response to xnav

Cheers, I will do that 🙂

Reply