objective-c - 获得正确的 NSDate 值——这是最有效的方法吗？

Question

我有这段代码可以获取本地日期/时间。它有效，但要获得我当前的日期/时间值而不是格林威治标准时间，似乎绕着灌木丛(10 个语句)走了很长一段路。

NSDate          *currentDateGMT = [NSDate date];
NSDateFormatter *currentDateDateFormatter = [[NSDateFormatter alloc] init];
NSTimeZone      *currentDateTimeZoneGMT = [NSTimeZone timeZoneWithName:@"GMT"];
NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"];

[currentDateDateFormatter setTimeZone: currentDateTimeZoneGMT];
[currentDateDateFormatter setDateFormat:@"yyyy-MM-dd HH:mm"];
[currentDateDateFormatter setLocale:locale];

NSString *currentDateString = [currentDateDateFormatter stringFromDate:currentDateGMT];
NSDate *currentDateAdjusted = [currentDateDateFormatter dateFromString:currentDateString]; 

[currentDateDateFormatter release];

有人可以确认这是获取当前机器值的最佳方式吗？

谢谢

Answer 1

NSDateFormatter 将默认为用户时区，因此最简单的解决方案是

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
//lower case h for hour will also default to the users
//12/24 hour clock preference
[formatter setDateFormat:@"yyyy-MM-dd hh:mm"];

NSString *currentDate = [formatter stringFromDate:[NSDate date]];

[formatter release];