Comparing two NSDates that are in different time zones

StackOverflow https://stackoverflow.com/questions/14513685

  •  17-01-2022
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题

I have two dates, one is in the UTC timezone and the other is in New Zealand. I need to compare if one date is greater than the other.

How do I do this? Do I need to convert them to the same timezone first?

有帮助吗？

解决方案

NSDates don't have timezones. They represent absolute moments in time. As long as you made the NSDates correctly -- i.e., if you created them via an NSDateFormatter, it has a timezone that needs to be set -- you can compare them directly.

其他提示

No. You can just compare them with the NSDate comparison function, which returns ascending/descending (kind of crazy semantics, but works).

How to compare two NSDates: Which is more recent?

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