How to calculate time difference in minutes between two dates in iOS [duplicate]

Answer 1

1. Use NSDateFormatter to convert the date strings into NSDate objects.
2. Call -[NSDate timeIntervalSinceDate:] to get the difference between the two dates in seconds.
3. Divide by 60 to get the difference in minutes.

Alternatively, you can use NSCalendar and NSDateComponents to calculate the difference in minutes for different calendars by using the components:fromDate:toDate:options: method.