如何判断两个时间是否是同一天

- (void)viewDidLoad {

[super
viewDidLoad];

NSString *d =
@"2015-03-05 23:59:59";

NSDateFormatter *format = [[NSDateFormatter
alloc]
init];

[format setDateFormat:@"yyyy:MM:dd HH:mm:ss"];

NSDate *date = [format
dateFromString:d];

NSLog(@"%i", [ViewController
isCurrentDay:date]);

}

// 判断两个时间是否是同一天

+ (BOOL)isCurrentDay:(NSDate *)aDate

{

if (aDate==nil)
return NO;

NSCalendar *cal = [NSCalendar
currentCalendar];

NSDateComponents *components = [cal
components:(NSCalendarUnitEra|NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay)
fromDate:[NSDate
date]];

NSDate *today = [cal
dateFromComponents:components];

components = [cal components:(NSCalendarUnitEra|NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay)
fromDate:aDate];

NSDate *otherDate = [cal
dateFromComponents:components];

if([today isEqualToDate:otherDate])

return YES;

return
NO;

}