NSDateFormatter:如何将带有'GMT'的日期字符串转换为本地NSDate? [英] NSDateFormatter: how to convert date string with 'GMT' to local NSDate?
问题描述
我需要将从服务器检索到的日期字符串转换为本地NSDate,字符串如下所示:
I need to convert a date string retrieved from a server, to local NSDate, the string looks like:
"Fri, 30 Nov 2012 00:35:18 GMT"
但现在是11月30日星期五,11 :36 AM,那么如何将字符串转换为有意义的本地NSDate?
But now it is Friday, 30th Nov, 11:36 AM, so how do I convert the string to a meaningful local NSDate?
我发现:
但看起来却恰恰相反。
推荐答案
请注意,NSDate始终存储日期,在GMT内部。然后使用日期格式化程序在本地时区创建字符串。在这种情况下,您开始使用字符串,因此需要使用日期格式化程序首先创建日期,然后再次使用它在本地时区创建一个字符串(默认情况下,时区不是指定)。
Note that NSDate's always store the date, internally, in GMT. You then use a date formatter to create a string in your local time zone. In this case, you are starting with a string so need to use the date formatter to create the date in the first place, and then use it again to create a string in your local time zone (which it defaults to when the timezone is not specified).
NSString *dateString = @"Fri, 30 Nov 2012 00:35:18 GMT";
NSDateFormatter *dateFormatter = [NSDateFormatter new];
dateFormatter.dateFormat = @"EEE, dd MM yyyy HH:mm:ss zzz";
NSDate *date = [dateFormatter dateFromString:dateString];
NSString *localDateString = [dateFormatter stringFromDate:date];
NSLog(@"%@", localDateString);
// Results: Thu, 29 11 2012 19:35:18 EST
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