//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 ;
NextViewController *next=[[NextViewController alloc]init];
[ self .navigationController pushViewController:next 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。
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