隐藏:
[self.navigationController setNavigationBarHidden:NO animated:YES];
显示:
[self.navigationController setNavigationBarHidden:YES animated:YES];
隐藏返回键
self.navigationItem.hidesBackButton = YES;
隐藏:
[self.navigationController setNavigationBarHidden:NO animated:YES];
显示:
[self.navigationController setNavigationBarHidden:YES animated:YES];
隐藏返回键
self.navigationItem.hidesBackButton = YES;