下拉的效果
上拉的效果
就是这么简单就OK啦!
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
CGFloat thresholdDistance = 100;
CGFloat percent = scrollView.contentOffset.y/thresholdDistance;
percent = MAX(0, MIN(1, percent));
[self.specialDetailsHeaderView doctorNavigationHiddenBackBtn:percent];
[self.navigationView setAlpha:percent];
}









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