title: Compare version numbers in Objective-C
body: <p>I am writing an application that receives data with items and version numbers. The numbers are formatted like "1.0.1" or "1.2.5". How can I compare these version numbers? I think they have to be formatted as a string first, no? What options do I have to determine that "1.2.5" comes after "1.0.1"?</p>