Objective-c – What unit of time does timeIntervalSinceDate return

nsdateobjective-c

What unit of time does timeIntervalSinceDate return? Is it seconds, milliseconds or something else?

The documentation says that it returns an NSTimeInterval, but what unit of time is that value?

Best Solution

It returns the number of seconds, as an NSTimeInterval value.

From this documentation page:

NSTimeInterval is always specified in seconds; it yields sub-millisecond precision over a range of 10,000 years.