Handle keyboard presentation and dismissal with scroll views

gistfile1.m

- (void)viewDidLoad {
    [super viewDidLoad];
	  
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboardShowNotification:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboardHideNotification:) name:UIKeyboardWillHideNotification object:nil];
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}
    

- (void)handleKeyboardShowNotification:(NSNotification *)note {
    CGRect keyboardFrame = [note.userInfo[UIKeyboardFrameBeginUserInfoKey] CGRectValue];
    UIEdgeInsets contentInsets = UIEdgeInsetsMake(0, 0, keyboardFrame.size.height, 0);
    
    self.tableView.contentInset = contentInsets;
    self.tableView.scrollIndicatorInsets = contentInsets;
}

- (void)handleKeyboardHideNotification:(NSNotification *)note {
    NSTimeInterval animationDuration = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    UIViewAnimationOptions animationCurve = [note.userInfo[UIKeyboardAnimationCurveUserInfoKey] unsignedIntegerValue] << 16;
    [UIView animateWithDuration:animationDuration delay:0 options:animationCurve animations:^{
        self.tableView.contentInset = UIEdgeInsetsZero;
        self.tableView.scrollIndicatorInsets = UIEdgeInsetsZero;
    } completion:nil];
}