Compare two NSDates.

We can use "compare" function of "NSComparisonResult" Class to get order of the NSDate.

switch ([dateOne compare:dateTwo]){case NSOrderedAscending:    NSLog(@"NSOrderedAscending");    break; case NSOrderedSame:            NSLog(@"NSOrderedSame");             break;case NSOrderedDescending:  NSLog(@"NSOrderedDescending");   break;}





or if we want to compare only date year month and day, we can use.







NSCalendar and NSDateComponents.// Get the current calendarNSCalendar* calendar = [NSCalendar currentCalendar];// Set the flags you want to match unsigned unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit;// Set the componentsNSDateComponents* comp1 = [calendar components:unitFlags fromDate:dateOne];NSDateComponents* comp2 = [calendar components:unitFlags fromDate:dateTwo];// Compare the date components.if ([comp1 day]==[comp2 day] && [comp1 month]==[comp2 month] && [comp1 year]==[comp2 year])NSLog(@"Dates match.");