How to convert NSDate to milliseconds in Objective-C? [duplicate]

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?

alexcristea

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!

AB Bolim

The timeIntervalSince1970 will return seconds from 1970. There are other timeIntervalSince methods if needed.

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

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