title: Is explicit call of insertSections:withRowAnimation: necessary?
body: <p>I have a <code>UITableView</code> showing photos and albums on the phone. When the app is started if there are no photos on the phone, I have zero sections. Then during runtime I take a photo with the app and in this moment I want to show the album.</p>
  
  <p>My <code>numberOfSectionsInTableView:</code> method returns 0 if there are no photos, and 1 if there is at least one. In this moment when the new photo is taken do I have to call <code>insertSections:withRowAnimation:</code> or is it enough just to return 1 in <code>numberOfSectionsInTableView:</code>?</p>