//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。