MoralAlberto

- (void)viewDidAppear:(BOOL) animated {
    [super viewDidAppear:animated];
    // Register notification when the keyboard will be show
    [[NSNotificationCenter defaultCenter] addObserver:self
        selector:@selector(keyboardWillShow:)
        name:UIKeyboardWillShowNotification
        object:nil];

    // Register notification when the keyboard will be hide
    [[NSNotificationCenter defaultCenter] addObserver:self