title: Move collection view on button click (swift)
body: <p>I have a collectionView that I am using to display my onboarding screen. Each cell takes the full width and height of the view and currently I have it working fine swiping between each cell (page). </p>
  
  <p>I have to implement a next button. This button will just move the collectionView over 1 index on each click (till the end). I am just trying to make it move right now and even though there a few similar questions I have not been able to come up with a solution this far.</p>
  
  <p>This is what I have tried</p>
  
  <pre><code>@IBAction func nextPageButtonClicked(_ sender: AnyObject) {
          let visibleItems: NSArray = self.collectionView.indexPathsForVisibleItems as NSArray
          let currentItem: NSIndexPath = visibleItems.object(at: 0) as! NSIndexPath
          let nextItem: NSIndexPath = NSIndexPath(row: currentItem + 1, section: 0)
          self.collectionView.scrollToItem(at: nextItem as IndexPath, at: .left, animated: true)
      }
  </code></pre>
  
  <p>I get an error about performing the binary operator on line 4 (currentItem + 1) but even if I hard code the number and try and run it, I still dont get the scroll to function</p>