Adjust ScrollView when keyboard appears

ScrollView keyboard

// call "registerForKeyboardNotifications" to enable

- (void)registerForKeyboardNotifications {
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWasShown:)
                                                 name:UIKeyboardDidShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillBeHidden:)
                                                 name:UIKeyboardWillHideNotification object:nil];
}

- (void)keyboardWasShown:(NSNotification*)aNotification {
    NSDictionary* info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
    UIEdgeInsets contentInsets = UIEdgeInsetsMake(scrollViewObject.contentInset.top, 0.0, kbSize.height, 0.0);
    scrollViewObject.contentInset = contentInsets;
    scrollViewObject.scrollIndicatorInsets = contentInsets;
}

- (void)keyboardWillBeHidden:(NSNotification*)aNotification {
    UIEdgeInsets contentInsets = UIEdgeInsetsMake(scrollViewObject.contentInset.top, 0.0, 0.0, 0.0);
    scrollViewObject.contentInset = contentInsets;
    scrollViewObject.scrollIndicatorInsets = contentInsets;
}