How to use the current time in Objective-C

Question

How should I import the current time into my app and use it to do some calculation?

What my app do is that it use the current time and do some calculation and then give me some percentage.

Answer 1

How are you wanting to get the time (in milliseconds?)

There's a few questions on here already - like this one, which should help point you in the right direction.

From the Apple Docs for NSDate

Creates and returns an NSDate object set to the given number of seconds from the first instant of 1 January 1970, GMT.

[[NSDate date] timeIntervalSince1970];