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copied!<p>Try following code for get number of days, min, hrs, months between two dates.</p> <pre><code>// The time interval NSTimeInterval theTimeInterval = 326.4; // Get the system calendar NSCalendar *sysCalendar = [NSCalendar currentCalendar]; // Create the NSDates NSDate *date1 = [[NSDate alloc] init]; NSDate *date2 = [[NSDate alloc] initWithTimeInterval:theTimeInterval sinceDate:date1]; // Get conversion to months, days, hours, minutes unsigned int unitFlags = NSHourCalendarUnit | NSMinuteCalendarUnit | NSDayCalendarUnit | NSMonthCalendarUnit; NSDateComponents *conversionInfo = [sysCalendar components:unitFlags fromDate:date1 toDate:date2 options:0]; NSLog(@"Conversion: %dmin %dhours %ddays %dmoths",[conversionInfo minute], [conversionInfo hour], [conversionInfo day], [conversionInfo month]); [date1 release]; [date2 release]; </code></pre> <p>Try following code for get number of days between two dates.</p> <pre><code>-(int)howManyDaysHavePast:(NSDate*)lastDate today:(NSDate*)today { NSDate *startDate = lastDate; NSDate *endDate = today; NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; unsigned int unitFlags = NSDayCalendarUnit; NSDateComponents *components = [gregorian components:unitFlags fromDate:startDate toDate:endDate options:0]; int days = [components day]; return days; // multiply by 24 for get remain hrs. } </code></pre> <p>Or fololw </p> <ul> <li><p><a href="https://stackoverflow.com/questions/5866852/how-can-i-get-the-date-difference">How can i get the Date Difference?</a></p></li> <li><p><a href="https://stackoverflow.com/questions/1189252/how-to-convert-an-nstimeinterval-seconds-into-minutes">How to convert an NSTimeInterval (seconds) into minutes</a></p></li> </ul>

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