title: Managing data for UITableViews
body: <p>I have two very simple, identical UITableViews in my app that are populated with thumbnail images named "thumb1.jpg", "thumb2.jpg", etc. These thumbnails have associated original images "1.jpg" and text files "1.txt" used for image processing. Everything is stored in the app's Documents folder.</p>
  
  <p>I want to keep the numbered, ordered naming for these files since it makes displaying the thumbnails in the UITableViews very easy with cellForRowAtIndexPath. I'm currently using a NSMutableArray (index: 1 object:"thumb1.jpg", etc) to track all images in the app.</p>
  
  <p>The issue is that users can add/delete images so maintaining the order is important. For handling adding/deleting I'm looking at using insertObjectAtIndex and removeObjectAtIndex on the NSMutableArray, which will maintain order but will require programmatically changing image and text file names when this happens. For example, if there are five images in the array "0.jpg","1.jpg","2.jpg","3.jpg","4.jpg" and the user deletes the second image ("1.jpg") the array will now have "2.jpg" at index 1 so filenames will have to be changed to "1.jpg", "1.txt", and "thumb1.jpg".</p>
  
  <p>How does this approach sound? I'm new to Objective-C so if you have other functions you'd use, etc I'd be interested to hear your opinion.</p>