Delegate methods for tracking character count

UITextField-CharacterCount.m

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    int remainder = MAX_CHARACTER_COUNT - textField.text.length;
    self.counterLabel.text = [NSString stringWithFormat:@"%d", remainder];
    
    if (textField == self.activityNameTextField) {
        self.counterLabel.yOrigin = self.activityNameContainerView.yOrigin;
        [self closePlaceTableView];
        
    } else {
        self.counterLabel.yOrigin = self.placeContainerView.yOrigin;
        [self.containerScrollView setContentOffset:CGPointMake(0, self.activityNameContainerView.yOrigin + self.activityNameContainerView.height) animated:YES];
        if (!textField.text.length) [self openPlaceTableView];
    }
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    NSUInteger oldLength = [textField.text length];
    NSUInteger replacementLength = [string length];
    NSUInteger rangeLength = range.length;
    NSUInteger newLength = oldLength - rangeLength + replacementLength;
    BOOL returnKey = [string rangeOfString: @"\n"].location != NSNotFound;
    
    if (textField == self.placeNameTextField) {
        if (!newLength)
            [self openPlaceTableView];
        else
            [self closePlaceTableView];
    }
    
    if ((newLength <= MAX_CHARACTER_COUNT)|| returnKey) {
        self.counterLabel.text = [NSString stringWithFormat:@"%d", MAX_CHARACTER_COUNT - newLength];
        return YES;
    } else {
        return (newLength < textField.text.length);
    }
}