scrollView或(tableView)实现手指上滑隐藏NavigationBar下滑显示
在viewWillDisappear:方法中设置navigationBar的不隐藏:
self.navigationController.navigationBarHidden = NO;
在scrollView的代理方法中：
-(void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset{
if(velocity.y>0)
{
[self.navigationController setNavigationBarHidden:YES animated:YES];
}
else
{
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
}
判断是否是下移，如果是下移就隐藏navigationBar
如果上滑下移的时候，顶部变黑,那么在viewDidLoad中添加如下代码:
if ([self respondsToSelector:@selector(edgesForExtendedLayout)]){
self.edgesForExtendedLayout = UIRectEdgeNone;}