NSDate休息5小时 [英] NSDate is 5 hours off

问题描述

我运行以下代码:

NSDate *现在= [NSDate日期]；

NSDate *now = [NSDate date];

NSLog(@"now: %@", now);

并获取:

2011-09-16 16:14:16.434 iSavemore [1229:7907]现在:2011-09-16 21:14:16 +0000

2011-09-16 16:14:16.434 iSavemore[1229:7907] now: 2011-09-16 21:14:16 +0000

您可以看到我在16:14:16(下午4:14)运行此程序，但NSDate返回21:16:16(下午9:14！).这是Xcode4问题还是NSDate问题?

As you can see i'm running this at 16:14:16 (4:14 pm) but NSDate is returning 21:16:16 (9:14 pm!). Is this an Xcode4 issue or NSDate issue?

推荐答案

NSDate默认为世界时区(又名GMT).

NSDate defaults to the Universal timezone (aka GMT).

我猜你在美国东部海岸的某个地方，比世界协调时间晚5小时.

I'm guessing you're somewhere on the East Coast, 5 hours behind UTC.

尝试将其添加到您的日期格式器中...

Try adding this to your date formatter...

NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];

[dateFormatter setLocale:[NSLocale currentLocale]];

...，您应该会看到当地时间.

...and you should see your local time.

如果要使用指定的语言环境而不是"currentLocale"，请为相关语言环境创建一个NSLocale.

If you want to use a specified locale, rather than 'currentLocale', create a NSLocale for the relevant locale.

NSLocale *usLoc = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];

[dateFormatter setLocale:usLoc];

...实际上是美国(因此可能不是中部地区).

...actually that's US (so possibly not Central).

可以在此处找到更具体的时区帮助...

More specific timezone help can be found here...

http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSDateFormatter_Class/Reference/Reference.html

但是，如果您想显示到期时间，您是否还不想在用户的currentLocale中显示它?

However, if you want to show expiry time, wouldn't you still want it in the user's currentLocale?

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