About the function -- egoRefreshScrollViewDidScroll:

[iOkay]

The realize of function as fellow:

• (void)egoRefreshScrollViewDidScroll:(UIScrollView *)scrollView {

  if (_state == EGOOPullRefreshLoading) {

  CGFloat offset = MAX(scrollView.contentOffset.y * -1, 0);
  offset = MIN(offset, 60);
  scrollView.contentInset = UIEdgeInsetsMake(offset, 0.0f, 0.0f, 0.0f);

  } else if (scrollView.isDragging) {

  BOOL _loading = NO;
  if ([_delegate respondsToSelector:@selector(egoRefreshTableHeaderDataSourceIsLoading:)]) {
    _loading = [_delegate egoRefreshTableHeaderDataSourceIsLoading:self];
  }
  
  if (_state == EGOOPullRefreshPulling && scrollView.contentOffset.y > -65.0f && scrollView.contentOffset.y < 0.0f && !_loading) {
    [self setState:EGOOPullRefreshNormal];
  } else if (_state == EGOOPullRefreshNormal && scrollView.contentOffset.y < -65.0f && !_loading) {
    [self setState:EGOOPullRefreshPulling];
  }
  
  if (scrollView.contentInset.top != 0) {
    scrollView.contentInset = UIEdgeInsetsZero;
  }

  }

}

if I am not add the condition of "scrollView.isDragging", like that

• (void)egoRefreshScrollViewDidScroll:(UIScrollView *)scrollView {

  if (_state == EGOOPullRefreshLoading) {

  CGFloat offset = MAX(scrollView.contentOffset.y * -1, 0);
  offset = MIN(offset, 60);
  scrollView.contentInset = UIEdgeInsetsMake(offset, 0.0f, 0.0f, 0.0f);

  } else {

  BOOL _loading = NO;
  if ([_delegate respondsToSelector:@selector(egoRefreshTableHeaderDataSourceIsLoading:)]) {
    _loading = [_delegate egoRefreshTableHeaderDataSourceIsLoading:self];
  }
  
  if (_state == EGOOPullRefreshPulling && scrollView.contentOffset.y > -65.0f && scrollView.contentOffset.y < 0.0f && !_loading) {
    [self setState:EGOOPullRefreshNormal];
  } else if (_state == EGOOPullRefreshNormal && scrollView.contentOffset.y < -65.0f && !_loading) {
    [self setState:EGOOPullRefreshPulling];
  }
  
  if (scrollView.contentInset.top != 0) {
    scrollView.contentInset = UIEdgeInsetsZero;
  }

  }

} what is the matter with it? What the potential bug will be?