title: xcode image gallery load images one after another
body: <p>I am currently developing an iPad app with four views that can be viewed with a segmented control. One of those views is an image gallery I created using UIScrollView. The problem is that all the images are being loaded into the view in the viewDidLoad method and so when I press "images" in the segmented control it takes about a second until the control highlights "images" and shows the view which is very inconvenient. 
  I'd like to achieve that when "images" is chosen the segmented control switches immediately and the view is being loaded and then the images should be loaded and put into the scroll view one after another.</p>
  
  <p>How to do that?</p>