Adding an array of UIButtons to navigationItem.rightBarButtonItem results in NSInvalidArgumentException

Question

I am trying to add an array of 2 buttons to the right of a navigation bar, but I get a exception when I run the code.

'NSInvalidArgumentException', reason: '-[UIButton isSystemItem]: unrecognized selector sent to instance

My code is pretty simple really:

   UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(0,0,100,45)];
   label.backgroundColor=[UIColor clearColor];
   label.text = @"Test 2 Buttons";

   UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom];
   button1.frame = CGRectMake(00.0f, 0.0f, 32.0f, 32.0f);

   UIButton *button2 = [UIButton buttonWithType:UIButtonTypeCustom];
   button2.frame = CGRectMake(00.0f, 0.0f, 32.0f, 32.0f);

   NSArray *rightBarButtons = [[NSArray alloc] initWithObjects:button2, button1, nil];


   UINavigationItem* navItem = self.navigationItem;
   navItem.titleView = label;
   navItem.rightBarButtonItems = rightBarButtons;
   [rightBarButtons release];
   [label release];

I am running it on the iPhone 5.0 simulator. Any idea?? Thanks in advance. Al

Answer 1

You can't directly add UIButtons. You need to wrap them as UIBarButtonItems first - there is no compiler warning since you are only passing an array.

Create the bar button items using initWithCustomView:, passing in your button as the custom view. Or, depending on what is in your buttons, create bar button items directly.