iOS - How to get raw offset for timezone?

问题

How do I get the raw offset in milliseconds for Coordinated Universal Time in iOS programmatically?

回答1:

NSInteger millisecondsFromGMT = 1000 * [[NSTimeZone localTimeZone] secondsFromGMT];

In Swift 3 and Swift 4:

let millisecondsFromGmt = 1000 * TimeZone.autoupdatingCurrent.secondsFromGMT()

回答2:

Please see answer to my question:

https://stackoverflow.com/a/31988549/3004003

It seems to be more precise regarding expression raw offset, because "raw" actually should mean "without DST at all", like it is in Java (getRawOffset() in java.util.TimeZone class)

来源：https://stackoverflow.com/questions/8188818/ios-how-to-get-raw-offset-for-timezone