title: Objective-C and sqlite's DATETIME type
body: <p>I have a sqlite3 table that I'm trying to map to an object in objective-C. One attribute of the table is 'completed_at' which is stored as a DATETIME.</p>
  
  <p>I want to create a property on my objective-C class (which inherits from NSObject) that will map well to the 'completed_at' attribute.</p>
  
  <p>Objective-C has an NSDate type but I'm not sure if that will map directly?</p>