Как показать выбранную дату на кнопке с помощью средства выбора даты?

когда я нажимаю на свою кнопку, я могу успешно отобразить средство выбора даты. Но когда я выбираю дату из средства выбора даты, я не могу показать выбранную дату UIbutton. пожалуйста, помогите мне

Вот мой код:

-(IBAction)btnDateClicked:(id)sender
{ 
UIActionSheet *actionSheet1 = [[UIActionSheet alloc] initWithTitle:nil 
                                                          delegate:nil
                                                 cancelButtonTitle:nil
                                            destructiveButtonTitle:nil
                                                 otherButtonTitles:nil];

[actionSheet1 setActionSheetStyle:UIActionSheetStyleBlackTranslucent];

CGRect pickerFrame = CGRectMake(0, 40, 0, 0);


UIDatePicker *pView=[[UIDatePicker alloc] initWithFrame:pickerFrame];

pView.datePickerMode=UIDatePickerModeDate; 

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

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

// NSDate *date=[df dateFromString:self.hController.fromDateTime];

// [pView setDate:date animated:YES];

self.datePicker=pView;

[actionSheet1 addSubview:self.datePicker];

[pView release];

UISegmentedControl *closeButton = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObject:@"Done"]];

closeButton.momentary = YES; 

closeButton.frame = CGRectMake(260, 7.0f, 50.0f, 30.0f);

closeButton.segmentedControlStyle = UISegmentedControlStyleBar;

closeButton.tintColor = [UIColor blackColor];

[closeButton addTarget:self action:@selector(dismissActionSheet1:) forControlEvents:UIControlEventValueChanged];

[actionSheet1 addSubview:closeButton];

[closeButton release];

[actionSheet1 showInView:[[UIApplication sharedApplication] keyWindow]];

[actionSheet1 setBounds:CGRectMake(0, 0, 320, 485)];

self.actionSheet=actionSheet1;

[actionSheet1 release];
}
///////////////////////////////////
- (void)dismissActionSheet1:(id)sender
{
[self.actionSheet dismissWithClickedButtonIndex:0 animated:YES];

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

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

//NSString *str=[df stringFromDate:self.datePicker.date]; 

//self.hController.selectDate=str;    
}