//#pragma mark 滑动隐藏导航栏
//-(void)viewWillDisappear:(BOOL)animated{
// [super viewWillDisappear:animated];
// self.navigationController.navigationBarHidden = NO;
//
//}
////滑动隐藏导航栏
//-(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];
// }
//}