title: How to add UIBarButtonItem in UIToolBar in code
body: <p>I have standart UIBarButtonItem</p>
  
  <pre>
  UIBarButtonItem *share = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:@selector(share:)];
  </pre>
  
  <p>How to add her to UIToolBar? I've tried</p>
  
  <pre>
      self.toolbarItems = [NSArray arrayWithObject:share];
  </pre>
  
  <p>But it doesn't work. Need your help.</p>