iOS隐藏导航栏或返回按钮

一，隐藏导航栏

隐藏导航栏

1，self.navigationController.navigationBarHidden = YES;

2，[self.navigationController setNavigationBarHidden:YES animated:YES];

二，返回按钮

1，以空替代

    UIBarButtonItem *temporaryBarButtonItem =[[UIBarButtonItem alloc]init];

    temporaryBarButtonItem.title = @"";

   self.navigationItem.backBarButtonItem= temporaryBarButtonItem;

2，隐藏（ 左右键则可以用）

     self.navigationItem.leftBarButtonItem.hidden = YES;