How to get daylight saving settings programmatically in Xcode?

问题

Some countries are observing daylight saving, so I want to know if daylight setting is currently turned on or off (TRUE or FALSE) on the iDevice then I could correct the date on my app. is that possible?

回答1:

Query the current NSCalendars timeZone to see if it is currently in daylight saving time.

BOOL dst = [[[NSCalendar currentCalendar] timeZone] isDaylightSavingTime];

来源：https://stackoverflow.com/questions/23152954/how-to-get-daylight-saving-settings-programmatically-in-xcode