- (void)scrollViewDidScroll:(UIScrollView*)scrollView{
if ( scrollView == self.conversationListTableView ){
CGFloat sectionHeaderHeight = 46;//这个高度就是你的header的高度
if (scrollView.contentOffset.y <= sectionHeaderHeight&&scrollView.contentOffset.y >= 0){
scrollView.contentInset= UIEdgeInsetsMake(-scrollView.contentOffset.y,0,0,0);
} else if (scrollView.contentOffset.y >= sectionHeaderHeight){
scrollView.contentInset= UIEdgeInsetsMake(-sectionHeaderHeight,0,0,0);
}
}
}