NSDate弄亂了我的約會！錯誤的時區？

Question

NSLog(@"%@ - %@ - %@",currTime,sunrise,sunset); 
NSString *curtime = [[currTime substringToIndex:(currTime.length-4)] stringByAppendingString:@"-0000"]; 
NSDateFormatter *formatter1 = [[NSDateFormatter alloc]init]; 
NSLocale *locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]autorelease]; 
[formatter1 setDateFormat:@"EEE, dd MMM yyyy h:mm aZ"]; 
[formatter1 setLocale:locale]; 

NSDate *time = [formatter1 dateFromString:curtime]; 
[formatter1 setDateFormat:@"EEE dd MMM yyyy"]; 
NSString *zone = [formatter1 stringFromDate:time]; 
NSString *r = [sunrise stringByAppendingString:zone]; 
NSString *s = [sunset stringByAppendingString:zone]; 

[formatter1 setDateFormat:@"hh:mm aEEE dd MMM yyyy"]; 
NSDate *rise = [formatter1 dateFromString:r]; 
NSDate *set = [formatter1 dateFromString:s]; 

unsigned int flags = NSHourCalendarUnit | NSMinuteCalendarUnit | NSDayCalendarUnit; 
NSCalendar *calendar = [NSCalendar currentCalendar]; 
NSDateComponents *components1 = [calendar components:flags fromDate:rise]; 
NSDateComponents *components2 = [calendar components:flags fromDate:set]; 
NSDateComponents *components3 = [calendar components:flags fromDate:time]; 

NSInteger riseHour = [components1 hour]; 
NSInteger setHour = [components2 hour]; 
NSInteger timeHour = [components3 hour]; 

NSLog(@"\nSunrise: %@ \nSunset: %@ \nCurrent: %@",rise,set,time); 
NSLog(@"Rise: %i Set: %i Time: %i",riseHour,setHour,timeHour); 

我希望這個工作。但是，看看下面的輸出：

孫，2011年6月12日上午1時54分CDT - 上午06點33 - 下午8:34

日出：2011-06-11 21時33分〇〇秒+0000

日落時間：2011-06-12 11點34分00秒+0000

電流：2011-06-12 1點54分00秒+0000

上升：6 <正確

套裝：20 < corr ECT

時間：10 <錯誤

Answer 1

嘗試設置時區爲GMT-0上都格式化和日曆。你可能會感到驚喜。

[NSTimeZone timeZoneForSecondsFromGMT:0]