You have a textfield/textview in the bottom(like in message/whatsapp) of view and keyboard is hiding it? Don't worry, use the following code!!! Connect an NSLayoutConstraint via IBOutlet for the bottom spacing. Also, If you are not using presented view controller with modalPresentationStyle as UIModalPresentationFormSheet , no need to use UIKeyb…

Move textfield for keyboard

- (void)viewDidLoad {
    //register for keyboard notification
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardShow:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardShow:) name:UIKeyboardDidShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)keyboardShow:(NSNotification *)notification {

    CGRect keyboardFrameEnd = [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
    CGFloat keyBoardAnimationDuration = [[notification.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];
    
    __weak typeof(self) weakSelf = self;

    [UIView animateWithDuration:keyBoardAnimationDuration animations:^{
        weakSelf.messageContainerBottomSpace.constant = [weakSelf heightCoveredByKeyboardOfSize:keyboardFrameEnd];
        [weakSelf.view layoutIfNeeded];
        [weakSelf scrollToBottomAnimated:NO];

    }];
}

- (void)keyboardWillHide:(NSNotification *)notification {
    
    __weak typeof(self) weakSelf = self;
    CGFloat keyBoardAnimationDuration = [[notification.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];
    [UIView animateWithDuration:keyBoardAnimationDuration animations:^{
        weakSelf.messageContainerBottomSpace.constant = 0;
        [weakSelf.view layoutIfNeeded];
    }];
}

- (CGFloat)heightCoveredByKeyboardOfSize:(CGRect)keyboardrect {
   
    CGRect keyboardrectConverted = [self.view convertRect:keyboardrect fromView: nil];
    CGFloat bottomSpace = self.view.bounds.size.height - keyboardrectConverted.origin.y;
    DLog("kframeConverted %@      bottomSpace %f    self.view.bounds %@",NSStringFromCGRect(keyboardrectConverted),bottomSpace,NSStringFromCGRect(self.view.bounds))
    return bottomSpace;
    
}