从NSString获取NSDate [英] get NSDate from NSString

问题描述

我以PST格式当前的日期和时间为字符串，例如

I have current date and time in PST format as a string such as

currentDateStr 06/02/11 05:40:33 PDT

任何人都可以告诉我如何将此字符串转换为NSDate。

Could anyone tell me how to convert this string into NSDate.

Thanx提前。

推荐答案

从这个SO问题NSDate表示在不同的时区，即本地时区（ GMT-400）到PST

NSDate always returns relative to GMT

这没有意义。 NSDate刚刚封装了一个绝对的时刻（让我们忘了一秒钟的相对性），它没有时区的概念。要说NSDate时间是相对于GMT是错误的。

This doesn't make sense. NSDate just encapsulates an absolute moment in time (let's forget about relativity for a second) and it has no concept of time zones whatsoever. To say that NSDate times are relative to GMT is wrong.

要在特定时区输出日期，您应该创建一个NSDateFormatter的实例并调用setTimeZone：on设置时区。根据Unicode文档，格式字符串@zzz应将时区值输出为PST。

To output a date in a specific time zone, you should create an instance of NSDateFormatter and call setTimeZone: on it to set the time zone. According to the Unicode docs, the format string @"zzz" should output the time zone value as "PST".

NSTimeZone *tz = [NSTimeZone timeZoneWithName:@"PST"]; // for PST

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