iOS 有关日期操作

//************有关日期的处理************
NSDateFormatter *inputFormatter = [[[NSDateFormatteralloc]init]
autorelease];
[inputFormatter setLocale:[[[NSLocalealloc]initWithLocaleIdentifier:@"en_US"]autorelease]];
[inputFormatter setDateFormat:@"MMM dd,yyyy"];// 根据需要设置格式
NSDate *date = [inputFormatter
dateFromString:dateString];;
NSLog(@"date=%@",date);
NSCalendar *calendar = [NSCalendarcurrentCalendar];
NSUInteger unitFlags =NSYearCalendarUnit |NSMonthCalendarUnit |NSDayCalendarUnit |NSHourCalendarUnit
|NSMinuteCalendarUnit |NSSecondCalendarUnit;
NSDateComponents *dateComponent = [calendarcomponents:unitFlagsfromDate:date];
int year = [dateComponent
year];
int month = [dateComponent
month];
int day = [dateComponent
day];
NSLog(@"year is: %d", year);
NSLog(@"month is: %d", month);
NSLog(@"day is: %d", day);