Adding 'Done' button to UIDatePicker with UIActionSheet

In one of my recent projects, I was dealing with the development of an iOS app which required the addition of a 'Done' button within a UIDatePicker. Finding a correct and functional solution was a real pain, so I decided to post my solution in case it helps anyone out there. This solution uses UIActionSheet(declared as  pickerAction)

 -(void)ChooseDP:(int)sender{  
   pickerAction = [[UIActionSheet alloc] initWithTitle:@"Date"  
                          delegate:nil  
                     cancelButtonTitle:nil  
                   destructiveButtonTitle:nil  
                     otherButtonTitles:nil];  
   datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake ( 0.0, 44.0, 0.0, 0.0)];  
   NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];  
   [dateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];  
   [dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"]];  
   //format datePicker mode. in this example time is used   
     datePicker.datePickerMode = UIDatePickerModeTime;  
     [dateFormatter setDateFormat:@"h:mm a"];  
      //calls dateChanged when value of picker is changed  
   [datePicker addTarget:self action:@selector(dateChanged) forControlEvents:UIControlEventValueChanged];  
   toolbarPicker = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];  
   toolbarPicker.barStyle=UIBarStyleBlackOpaque;  
   [toolbarPicker sizeToFit];    
   NSMutableArray *itemsBar = [[NSMutableArray alloc] init];    
      //calls DoneClicked  
   UIBarButtonItem *bbitem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(DoneClicked)];  
   [itemsBar addObject:bbitem];  
   [toolbarPicker setItems:itemsBar animated:YES];      
   [pickerAction addSubview:toolbarPicker];  
   [pickerAction addSubview:datePicker];  
   [pickerAction showInView:self.view];  
   [pickerAction setBounds:CGRectMake(0,0,320, 464)];   
 }  

-(IBAction)dateChanged{
    //format date   
    NSDateFormatter *FormatDate = [[NSDateFormatter alloc] init];
    [FormatDate setLocale: [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"] ];
 
 //set date format
    [FormatDate setDateFormat:@"MM/dd/YYYY"];   
 //update date textfield
    date.text = [FormatDate stringFromDate:[datePicker date]];
   
}


-(BOOL)closeDatePicker:(id)sender{   
    [pickerAction dismissWithClickedButtonIndex:0 animated:YES];
    [date resignFirstResponder];   
     
    return YES;
}

//action when done button is clicked
-(IBAction)DoneClicked{   
    [self closeDatePicker:self];
    datePicker.frame=CGRectMake(0, 44, 320, 416);
    
}

//returns number of components in pickerview
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
    return 1;
}

//returns number of rows in date picker
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
    return 40;
}