Question

I am trying to calculate an interval between now and a user defined date in days so that the results appear in a label on tapping a button.

The difference is always -4080 I am not sure what is wrong with my equation.
Thank you for your help

- (void)LabelChange2:(id)sender{
    NSDateFormatter *df3 = [[NSDateFormatter alloc] init];
    df3.dateStyle = NSDateFormatterMediumStyle;
    labelDOB.text = [NSString stringWithFormat:@"%@",
                     [df3 stringFromDate:datepick.date]];
}



  NSDate * df3 = [datePick date];
    NSCalendar *gregorian = [[NSCalendar alloc] 
                             initWithCalendarIdentifier:NSGregorianCalendar];
    NSDateComponents *comps = [gregorian components: NSDayCalendarUnit 
                                           fromDate: [NSDate date]  
                                             toDate: df3 
                                            options: 0];
    int days = [comps day];
    labelResult.text = [NSString stringWithFormat:@"%i", days];

Answer 1

Your code works fine. However if I run the code with the datePick pointer set to nil I will get an answer of -4080 from this code. You should check your connections to the UIDatePicker.