隱藏導航欄或返回按鈕

1 - (void)viewWillAppear:(BOOL)animated
2 {
3    [super viewWillAppear:animated];
4    [self.navigationController setNavigationBarHidden:YES animated:YES]; // 隱藏導航欄
5    [self.navigationItemsetHidesBackButton:YES];   // 隱藏返回按鈕
5 }

 

左右鍵則可以用 
self.navigationItem.leftBarButtonItem.hidden = YES;