TarBarController 自定义tabbar push隐

//1.设置

self.tabBarController.tabBar.hidden=YES;

//2.如果在push跳转时需要隐藏tabBar，设置

self.hidesBottomBarWhenPushed=YES;

NewViewController *new=[[NewViewController alloc]init];

[self.navigationController pushViewController:new animated:YES];

//并在push后设置

self.hidesBottomBarWhenPushed=NO;

//back回来，tabBar会恢复正常显示。