Keyboard rising before the view up

I made an example using Swift, but the footprint is more or less the same.

You can also choose to animate the view of the UIViewController as a whole as follows:

Attributes:

@IBOutlet weak var search: UITextField!
var isKeyboardLifted: Bool = false

ViewWillAppear

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)
    var center: NSNotificationCenter = NSNotificationCenter.defaultCenter()
    center.addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
    center.addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)

    var tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "dismissKeyboard")
    self.view.addGestureRecognizer(tap)
}

Selectors methods

// MARK: UITextFieldDelegate
// Selector do keyboardWillShow
func keyboardWillShow(notification: NSNotification) {
    var info: NSDictionary = notification.userInfo!
    var keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue()

    var keyboardHeight: CGFloat = keyboardSize.height

    if (!isKeyboardLifted) {
        self.isKeyboardLifted = true
        UIView.animateWithDuration(0.3, delay: 0.0, options: UIViewAnimationOptions.CurveEaseIn, animations: { () -> Void in
            self.view.frame = CGRectMake(0, (self.view.frame.origin.y - keyboardHeight), self.view.bounds.width, self.view.bounds.height)
        }, completion: nil)
    }
}

// Selector do keyboardWillHide
func keyboardWillHide(notification: NSNotification) {
    var info: NSDictionary = notification.userInfo!
    var keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue()

    var keyboardHeight: CGFloat = keyboardSize.height

    if (isKeyboardLifted) {
        self.isKeyboardLifted = false
        UIView.animateWithDuration(0.3, delay: 0.0, options: UIViewAnimationOptions.CurveEaseIn, animations: { () -> Void in
            self.view.frame = CGRectMake(0, (self.view.frame.origin.y + keyboardHeight), self.view.bounds.width, self.view.bounds.height)
        }, completion: nil)
    }
}

// Selector do UIGesture
func dismissKeyboard() {
    self.search.endEditing(true)
}

You can do this offset with or without system notifications. It has already occurred to me of UIKeyboardDidShowNotification and UIKeyboardWillShowNotification to generate a delay that prevented the animation from being offset compatible with the animation of the keyboard input. If this is happening to you, do so:

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    NSDictionary* info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    //Deixar o scrollView maior permite que o usuário role a página até o fim sem precisar esconder o teclado.
    self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width, self.scrollView.frame.size.height + kbSize.height);

    //No método "viewDidLoad" da respectiva classe, valorize uma variável global 'tamanhoDeslocamentoTeclado' com o valor 0.
    tamanhoDeslocamentoTeclado = 0;

    CGRect frameRelativo = [textField convertRect:textField.bounds toView:self.scrollView];

    //DISTANCIA_TECLADO_PROXIMA é um define onde você escolhe a qual distância do textField/textView o teclado deve ficar. Entre 8.0 e 15.0, por exemplo. 
    int alturaIdeal = self.view.frame.size.height - (kbSize.height) - textField.frame.size.height - DISTANCIA_TECLADO_PROXIMA;

    if(frameRelativo.origin.y > alturaIdeal)
    {
        tamanhoDeslocamentoTeclado = frameRelativo.origin.y - alturaIdeal;
    }

    if(tamanhoDeslocamentoTeclado!=0)
    {
        [UIView animateWithDuration:0.3 delay:0.0 options:UIViewAnimationOptionCurveEaseOut
                     animations:^{self.scrollView.contentOffset = CGPointMake(0, tamanhoDeslocamentoTeclado);}
                     completion:nil];
    }
}

- (void)textFieldDidEndEditing:(UITextField *)textField
{
    //No método "viewDidLoad" da respectiva classe, valorize uma variável global 'tamanhoOriginalScroll' com o tamanho original do scrollView. Este tamanho é o que o componente ocupa quando não há teclado nenhum na tela.

    if(tamanhoDeslocamentoTeclado!=0)
    {
        [UIView animateWithDuration:0.3 delay:0.0 options:UIViewAnimationOptionCurveEaseOut
                     animations:^{self.scrollView.contentOffset = CGPointMake(0, 0);self.scrollView.contentSize = tamanhoOriginalScroll;}
                     completion:nil];
   }
}

It is possible that your scrollView is inside another view container (or several others), being necessary in this case to know the position of the scrollView in relation to the base view of the parent viewController. This shift is more advanced because it requires an extra variable of control, but I believe it is not your case.