Check if date lies in Range form now to last hundred year --- IOS

- (BOOL)checkDateRange {

    

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

    [dateFormatter setDateFormat:@"MM/dd/yyyy"];

    NSDate *date = [dateFormatter dateFromString:YOUR_DATE_IN_TEXTFIELD];

    

//Hundred year ago date from today

    unsigned unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit;

    NSDate *now = [NSDate date];

    NSCalendar *gregorian = [NSCalendar currentCalendar];

    NSDateComponents *comps = [gregorian components:unitFlags fromDate:now];

    [comps setYear:[comps year] - 100];

    NSDate *hundredYearsAgo = [gregorian dateFromComponents:comps];

    

Comparison of two dates 

    NSComparisonResult result, result2;

    

    result = [date compare:now]; // comparing two dates

    result2 = [date compare:hundredYearsAgo]; // comparing two dates

    

    if(result==NSOrderedAscending && result 2==NSOrderedDescending)

    {

        

        NSLog(@"Between the StartDate and Enddate");

        return YES;

    }

    else

    {

        NSLog(@"date in not in rang e...");

        UIAlertView * al = [[UIAlertView alloc] initWithTitle:@"Notification" message:@"Please enter valid date" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];

        [al show];

        return NO;

    }

}