title: What's the correct way to store a time interval in Core Data?
body: <p>I need to store a time interval in an app's database that will be added occasionally to <code>NSDate</code>. Problem is, I don't know what data type to choose for it. Some people advise to store <code>NSTimeInterval</code>, but will it cause miscalculations when user's timezone changes? Maybe it's better to store <code>NSDateComponents</code> (as a "Transformable" data type) or is there another better way to do it?</p>