无法解锁UIDatepicker中的前几个月和日期并显示ios中的时间

Question

在我的项目中，我需要显示日期18回来并锁定我试过的100年我得到了它但是这里锁定了那一年的日期和月份（1912年）我还需要显示那一年的所有日期和月份（ 1912）还有一件事，当我选择日期时，它会随着时间而显示我不想表明时间可以解决这个问题

 -(IBAction)donePickerView:(id)sender
 {

 NSDate *minDate1 =[datePickerView date];
NSString *theDate = [NSString stringWithFormat:@"%@",minDate1];

 self.dob.text = theDate;
 DatePicView.hidden = TRUE;
  datePickerView.hidden =TRUE;


}
-(void)textFieldDidBeginEditing:(UITextField *)textField {  
   [self scrollViewToCenterOfScreen:textField];
   scrlView.scrollEnabled = FALSE;
    if (textField == dob) 
{
   DatePicView.hidden = FALSE;
   datePickerView.hidden =FALSE;
   NSCalendar * gregorian = [[NSCalendar alloc] initWithCalendarIdentifier: NSGregorianCalendar];

   NSDate * currentDate = [NSDate date];


   NSDateComponents * comps = [[NSDateComponents alloc] init];
   [comps setYear: -18];
   NSDate * maxDate = [gregorian dateByAddingComponents: comps toDate: currentDate options: 0];
   [comps setYear: -100];
   NSDate * minDate = [gregorian dateByAddingComponents: comps toDate: currentDate options: 0];

      [datePickerView setMinimumDate:minDate];
   [datePickerView setMaximumDate:maxDate];
   [datePickerView setDate:minDate];
         [dob resignFirstResponder];

       }
}

Answer 1

您将maxDate设置为-100年。

所以maxDate低于minDate，如果这些是另一种方式？

NSLog(@"Now: %@", currentDate);
NSLog(@"Max: %@", maxDate);
NSLog(@"Min: %@", minDate);


Now: 2012-10-18 10:04:43 +0000
Max: 1994-10-18 11:04:43 +0000
Min: 1912-10-18 11:45:11 +0000

如果您选择1980-12-12，这比最大日期低，然后高于最小日期。

UIDatePicker *pickerView = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 0, 320, 300)];
//  add this to display date only.
[pickerView setDatePickerMode:UIDatePickerModeDate];

[pickerView setMinimumDate:minDate];
[pickerView setMaximumDate:maxDate];
[pickerView setDate:minDate];
[[self view] addSubview:pickerView];
[pickerView setDatePickerMode:UIDatePickerModeDate];