UINavigationController的navigationBar消失
我有这个：
FirstViewController:
SecondViewController *secondViewController = [[SecondViewController alloc] init];
[self.navigationController pushViewController:secondViewController animated:YES];
SecondViewController:
- (void)viewDidLoad
{
[super viewDidLoad];
[self.navigationController setNavigationBarHidden:YES];
}
我的问题是，当我从 SecondViewController 返回到 FirstViewController 时，导航栏是仍然隐藏。有没有办法让它在我回到 FirstViewController 时出现？
I have this:
FirstViewController:
SecondViewController *secondViewController = [[SecondViewController alloc] init];
[self.navigationController pushViewController:secondViewController animated:YES];
SecondViewController:
- (void)viewDidLoad
{
[super viewDidLoad];
[self.navigationController setNavigationBarHidden:YES];
}
My problem is that when I comeback from SecondViewController to FirstViewController the NavigationBar is still hidden.Is there a way to make it appear when I'm back in FirstViewController?
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评论（3）
在 FirstViewController.m 中：
In the
FirstViewController.m:是的，不同的导航控制器总是有可能将该栏设置为隐藏。因此，在您的
viewWillAppear中设置标志如下：Yep, it's always possible that a different navigation controller will have set the bar to be hidden. So, in your
viewWillAppearset the flag as follows:您需要设置 [self.navigationController setNavigationBarHidden:NO];
这样就可以了。
You need to set [self.navigationController setNavigationBarHidden:NO];
This will do.