title: QLPreviewController remove or add UIBarButtonItems
body: <p>I have seen this kind of question a lot on the internet but it seems no one really knows the answer?</p>
  
  <p>I am using QLPreviewController for displaying PDF documents. I first used a UIWebView but I was recommended to use QLPreviewController instead for performance reasons with bigger documents.</p>
  
  <p>what I want is 4 custom UIBarButtonItem's in the top right (so where the print button is).</p>
  
  <p>I managed to get a custom toolbar at the bottom, but that's not really what I want.</p>
  
  <p>Considering that it is not possible to add custom button at the place of the print button, I still want to remove the printbutton and use the custom toolbar instead.</p>
  
  <p><strong>EDIT (Solution):</strong>
  <em>I found the solution a while ago but didn't update this post so here is how I solved the problem:</em></p>
  
  <p>I add al the buttons manually:</p>
  
  <pre><code>// Create a toolbar to have the buttons at the right side of the navigationBar
  UIToolbar* toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 180, 44.01)];
  [toolbar setTranslucent:YES];
  
  // Create the array to hold the buttons, which then gets added to the toolbar
  NSMutableArray* buttons = [[NSMutableArray alloc] initWithCapacity:4];
  
  
  // Create button 1
  button1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:self action:@selector(button1Pressed)];
  [buttons addObject:button1];
  
  // Create button 2
  button2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCompose target:self action:@selector(button2Pressed)];
  [buttons addObject:button2];
  
  // Create button 3
  button3 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:self action:@selector(button3Pressed)];
  [buttons addObject:button3];
  
  // Create a action button
  openButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:@selector(openWith)];
  [buttons addObject:openButton];
  
  // insert the buttons in the toolbar
  [toolbar setItems:buttons animated:NO];
  
  // and put the toolbar in the navigation bar
  [[self navigationItem] setRightBarButtonItem:[[UIBarButtonItem alloc] initWithCustomView:toolbar]];
  </code></pre>