Difference between two NSDates

Question

I am taking two NSDates by using date time picker. Now I want to count the number of days between these two NSDates. How can I find the difference between two NSDates.

Answer 1

Here's a Swift implementation (I use this all the time while debugging things like network requests and JSON parsing):

let date1 = NSDate()

// do some long running task

let date2 = NSDate()
print(date2.timeIntervalSinceDate(date1))

// you can also do this in one line, of course:
print(NSDate().timeIntervalSinceDate(date1))