使用 NSDate,NSCalendar, NSDateComponents 获得时间之差总结 .

2009-09-27 JHorn

方法一

NSDate* toDate1 = [ [ NSDate alloc] initWithString:@"2520-9-26 17:10:00 +0600" ];

NSTimeInterval distance = [ toDate1 timeIntervalSinceNow ];

NSTimeInterval iDat = distance / ( 86400 ) ;

NSLog( @" From now to %@ diff: %f ", [toDate1 description ], iDat );

[ toDate1 release ];

方法二

NSDate* toDate = [ [ NSDate alloc] initWithString:@"2009-9-29 0:0:00 +0600" ];

NSDate* startDate = [ [ NSDate alloc] init ];

NSCalendar* chineseClendar = [ [ NSCalendar alloc ] initWithCalendarIdentifier:NSGregorianCalendar ];

NSUInteger unitFlags = NSHourCalendarUnit | NSMinuteCalendarUnit |

NSSecondCalendarUnit | NSDayCalendarUnit

| NSMonthCalendarUnit | NSYearCalendarUnit;

NSDateComponents *cps = [ chineseClendar components:unitFlags fromDate:startDate toDate:toDate options:0];

NSInteger diffHour = [ cps hour ];

NSInteger diffMin = [ cps minute ];

NSInteger diffSec = [ cps second ];

NSInteger diffDay = [ cps day ];

NSInteger diffMon = [ cps month ];

NSInteger diffYear = [ cps year ];

NSLog( @" From Now to %@, diff: Years: %d Months: %d, Days; %d, Hours: %d, Mins:%d, sec:%d",

[toDate description], diffYear, diffMon, diffDay, diffHour, diffMin,diffSec );

[ toDate release ];

[ startDate release ];

[ chineseClendar release ];