table header 随cell上滑

//去掉UItableview headerview黏性
func scrollViewDidScroll(scrollView:
UIScrollView) {
let sectionHeaderHeight =
45 as
CGFloat
let yPostion = scrollView.contentOffset.y
as CGFloat
scrollView.contentInset =
UIEdgeInsetsMake(-scrollView.contentOffset.y,
0, 0,
0);
if((sectionHeaderHeight >= yPostion)&&(yPostion >=
0)){
scrollView.contentInset =
UIEdgeInsetsMake(-scrollView.contentOffset.y,
0, 0,
0);
} else
if (yPostion >= sectionHeaderHeight) {
scrollView.contentInset =
UIEdgeInsetsMake(-sectionHeaderHeight,
0, 0,
0);
}
}