iPhone - Keyboard hides TextField

I am using UITextField to receive user inputs. However, since my textfields are towards the middle/bottom of the nib, it gets hidden when the keyboard pops up. Is there any way sort of slide it along with the keyboard so that it's on the top of the keyboard during selection? Also, since I am also using the numberpad, is there an easy way to include a done button somewhere?

Thanks for the help.

I have made a simple Application for this problem. It automatically checked the Textfield's position and if keyboard hides it , it will automatically move up as per need.

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    [self animateTextField:textField up:YES];
}


- (void)textFieldDidEndEditing:(UITextField *)textField
{
    [self animateTextField:textField up:NO];
}


- (void) animateTextField: (UITextField*) textField up: (BOOL) up
{
    int animatedDistance;
    int moveUpValue = textField.frame.origin.y+ textField.frame.size.height;
    UIInterfaceOrientation orientation =
    [[UIApplication sharedApplication] statusBarOrientation];
    if (orientation == UIInterfaceOrientationPortrait ||
        orientation == UIInterfaceOrientationPortraitUpsideDown)
    {

        animatedDistance = 216-(460-moveUpValue-5);
    }
    else
    {
        animatedDistance = 162-(320-moveUpValue-5);
    }

    if(animatedDistance>0)
    {
        const int movementDistance = animatedDistance;
        const float movementDuration = 0.3f; 
        int movement = (up ? -movementDistance : movementDistance);
        [UIView beginAnimations: nil context: nil];
        [UIView setAnimationBeginsFromCurrentState: YES];
        [UIView setAnimationDuration: movementDuration];
        self.view.frame = CGRectOffset(self.view.frame, 0, movement);       
        [UIView commitAnimations];
    }
}

-(BOOL)textFieldShouldReturn:(UITextField *)textField {

    [textField resignFirstResponder];
    return YES;
}

To scroll when the keyboard appears, I like this tutorial from Cocoa With Love.

To dismiss the number keypad, you can put a custom "Done" button on the keypad or make an invisible button over the rest of the screen. I have done the latter with code, but this tutorial uses Interface Builder.

You'll have to do this one manually. Check out this answer. UITextField: move view when keyboard appears