title: iPhone Saving Images to Documents Directory
body: <p>I am retrieving an image from the user's photo library, and saving that image in the documents directory.  I am currently naming the picture based on what the user enters in a text field.  This works, but the text field is not really a good name for the picture.  I would like to use some sort of unique identifier for naming the pictures.</p>
  
  <p>Any ideas or suggestions?  I just do not want to have conflicts when a large amount of photos are saved by the user.</p>