1》//滑動(dòng)隱藏導(dǎo)航欄，簡書效果
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
CGPoint translation = [scrollView.panGestureRecognizer translationInView:scrollView.superview];
[self.navigationController setNavigationBarHidden:translation.y<0 animated:YES];
NSLog(@"ContentOffset ?x is ?%f,yis %f",translation.x,translation.y);
}
《2》//滑動(dòng)隱藏導(dǎo)航欄， 結(jié)束時(shí)兩個(gè)方向有速度，才執(zhí)行
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
CGPoint translation = [scrollView.panGestureRecognizer translationInView:scrollView.superview];
[self.navigationController setNavigationBarHidden:translation.y<0 animated:YES];
NSLog(@"ContentOffset ?x is ?%f,yis %f",translation.x,translation.y);
}
