问题
For example: assume NSDate tempdate = "05-23-2013". I want this value to be converted into milliseconds.
How can I do this with Objective-C?
回答1:
There is a similar post here and here.
Basically you have get the second form the reference date (1 January 2001, GMT) and multiply it with 1000.
NSTimeInterval seconds = [NSDate timeIntervalSinceReferenceDate];
double milliseconds = seconds*1000;
Cheers!
回答2:
The timeIntervalSince1970 will return seconds from 1970. There are other timeIntervalSince methods if needed.
https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSDate_Class/Reference/Reference.html#//apple_ref/occ/instm/NSDate/timeIntervalSince1970
For reverse conversion, I mean to say from milliseconds to NSDate, refer this stackoverflow article. Convert milliseconds to NSDate
Hope it ll solve your issue.
来源：https://stackoverflow.com/questions/15827657/how-to-convert-nsdate-to-milliseconds-in-objective-c