//1.设置self.tabBarController.tabBar.hidden=YES;
self.tabBarController.tabBar.hidden=YES;
//2.如果在push跳转时需要隐藏tabBar,设置self.hidesBottomBarWhenPushed=YES;
self.hidesBottomBarWhenPushed=YES;
DetailViewController *detail=[[DetailViewController alloc]init];
[self.navigationController pushViewController:deatil animated:YES];
self.hidesBottomBarWhenPushed=NO;
//并在push后设置self.hidesBottomBarWhenPushed=NO;
//这样back回来的时候,tabBar会恢复正常显示。