NSDate NSTimerZone 时区转换

timeZoneAbbreviation = @“America/New_York”；

#pragma mark - 转换时区

- (NSDate *) convertDate:(NSDate *) date
toTimeZone:(NSString *) timeZoneAbbreviation {

if (!date) {

return nil;

}

NSTimeZone *locationZone  =
[NSTimeZonesystemTimeZone];

NSTimeZone *zoneUTC     =  
[NSTimeZone
timeZoneWithName:timeZoneAbbreviation];

NSTimeInterval s       
= [zoneUTC secondsFromGMTForDate:date];

NSTimeInterval p        =
[locationZone secondsFromGMTForDate:date];

NSTimeInterval i = s-p;

NSDate *d =
[NSDatedateWithTimeInterval:i
sinceDate:date];

return d;

}