Open UIPickerview or UIDatePicker when user enters textfield

UITextField_OnEnter_Pickers.mm

//With actionsheet
#pragma mark -
#pragma mark TextField delegate

- (void)textFieldDidBeginEditing:(UITextField *)myTextField{
         [myTextField resignFirstResponder];

        actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil]; //as we want to display a subview we won't be using the default buttons but rather we're need to create a toolbar to display the buttons on

        [actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];
        CGRect pickerFrame = CGRectMake(0, 40, 0, 0);

        UIPickerView *pickerView = [[UIPickerView alloc] initWithFrame:pickerFrame];
        pickerView.showsSelectionIndicator = YES;
        pickerView.dataSource = self;
        pickerView.delegate = self;
        [actionSheet addSubview:pickerView];

        pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
        pickerToolbar.barStyle = UIBarStyleBlackOpaque;
        [pickerToolbar sizeToFit];

        NSMutableArray *barItems = [[NSMutableArray alloc] init];

        UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
        [barItems addObject:flexSpace];

        UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneButtonPressed:)];
        [barItems addObject:doneBtn];

        UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancelButtonPressed:)];
        [barItems addObject:cancelBtn];

        [pickerToolbar setItems:barItems animated:YES];

        [actionSheet addSubview:pickerToolbar];

        [actionSheet addSubview:pickerView];

        [actionSheet showInView:self.view];

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

}

//When the pickerview is a UIDatePicker
- (void)textFieldDidBeginEditing:(UITextField *)aTextField{
  [aTextField resignFirstResponder];

	pickerViewPopup = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];

	pickerView = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 44, 0, 0)];
	pickerView.datePickerMode = UIDatePickerModeDate;
	pickerView.hidden = NO;
	pickerView.date = [NSDate date];

	pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
	pickerToolbar.barStyle = UIBarStyleBlackOpaque;
	[pickerToolbar sizeToFit];

	NSMutableArray *barItems = [[NSMutableArray alloc] init];

	UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
	[barItems addObject:flexSpace];

	UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneButtonPressed:)];
	[barItems addObject:doneBtn];

	UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancelButtonPressed:)];
	[barItems addObject:cancelBtn];

	[pickerToolbar setItems:barItems animated:YES];

	[pickerViewPopup addSubview:pickerToolbar];
	[pickerViewPopup addSubview:pickerView];
	[pickerViewPopup showInView:self.managingViewController.view];
	[pickerViewPopup setBounds:CGRectMake(0,0,320, 464)];
}

//And to dismiss the action when finished
-(void)doneButtonPressed:(id)sender{
  //Do something here here with the value selected using [pickerView date] to get that value

	[pickerViewPopup dismissWithClickedButtonIndex:1 animated:YES];
}

-(void)cancelButtonPressed:(id)sender{
	[pickerViewPopup dismissWithClickedButtonIndex:1 animated:YES];
}

//Without actionsheet
#pragma mark -
#pragma mark TextField delegate
- (void)textFieldDidBeginEditing:(UITextField *)myTextField{

         [myTextField resignFirstResponder];

          for (int component = 0;  component < (((NSInteger)numberOfComponentsForPickerView) - 1); component++) {

              NSInteger valueForRow = [[self.textField.text substringWithRange:NSMakeRange(component,1)] integerValue];

               [pickerView selectRow:valueForRow inComponent:component animated:YES];

          }

           [self fadeInPickerView];

           [view addSubview:pickerView];

           [pickerView release];

}


-(void)fadeInPickerView{

        self.pickerView.alpha = 0.0;

        [UIView beginAnimations:@"" context:nil];

        [UIView setAnimationDuration:0.5f];

        [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

        [UIView setAnimationDelegate:self];

        self.pickerView.alpha = 1.0;

        [UIView commitAnimations];

}



//see http://www.springtiger.co.uk/2010/08/18/open-uipickerview-when-user-enters-textfield/