blocks|key|4244220|text|由于您将advancedVC添加为self.view的子视图，因此它将被添加到self.view的框架内，我猜这已经补偿了状态栏。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4244221|通过添加下面这行代码，您可能很容易解决此问题：|4244222|nav.view.frame+=+self.view.frame;|code-block|syntax|javascript|4244223|就在这条线的上方：|4244224|self.view+=+nav.view;|4244225|-|4244226|Other+Thoughts|BOLD|4244227|我不了解您的整个设置，但可能根本不需要self.view。只需将advancedVC实例设置为App+Delegate中包含的UIWindow实例的rootViewController即可。|4244228|entityMap^0|4|A|H|9|13|9|0|0|0|0|0|0|0|E|0|J|9|W|A|1R|8|22|I|0^^$0|@$1|2|3|4|5|6|7|Z|8|@$9|10|A|11|B|C]|$9|12|A|13|B|C]|$9|14|A|15|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|16|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|17|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|18|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|19|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|1A|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1B|8|@$9|1C|A|1D|B|U]]|D|@]|E|$]]|$1|V|3|W|5|6|7|1E|8|@$9|1F|A|1G|B|C]|$9|1H|A|1I|B|C]|$9|1J|A|1K|B|C]|$9|1L|A|1M|B|C]]|D|@]|E|$]]|$1|X|3|-4|5|6|7|1N|8|@]|D|@]|E|$]]]|Y|$]]

Since you're adding <code>advancedVC</code> as a subview of <code>self.view</code>, it is being added inside the frame of <code>self.view</code> which I'm guessing is already compensating for the status bar.

You can probably easily fix this by adding this line:

<pre><code>nav.view.frame = self.view.frame;
</code></pre>

Just above this line:

<pre><code>self.view = nav.view;
</code></pre>

-

Other Thoughts

I'm not privy to your entire setup, but <code>self.view</code> may not be needed at all. Simply make your <code>advancedVC</code> instance the <code>rootViewController</code> of the <code>UIWindow</code> instance contained in your App Delegate.

blocks|key|1351120|text|已通过修复导航控制器的插入方式解决此问题。而不是将其插入到已经放到选项卡栏控制器上的视图中，而应该将导航定位控制器直接放到导航控制器上。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1351121|advancedSearchFormVC+=+[[AdvancedSearchFormVC+alloc]+initWithNibName:@"AdvancedSearchForm"+bundle:nil];
UINavigationController+*searchNavController+=+[[UINavigationController+alloc]+initWithRootViewController:advancedSearchFormVC];|code-block|syntax|javascript|1351122|这只是tabbar控制器上的一个控制器，同时替换了advancedSearchFormVC。然后，将这个导航控制器添加到放在that栏控制器上的控制器数组中。|1351123|很抱歉给你带来麻烦，但这是我可以直接看到而不是看到的问题之一。我应该早些时候看到这一点，因为我在way栏控制器上已经有了另一个导航控制器，并且它是以相同的方式设置的。|1351124|谢谢你的帮助。|1351125|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

The problem was resolved by fixing the way the navigation controller was inserted. Instead of inserting it into a view that had been put onto the tabbar controller, the navigaiton controller should have been put directly onto the navigation controller.

<pre><code>advancedSearchFormVC = [[AdvancedSearchFormVC alloc] initWithNibName:@"AdvancedSearchForm" bundle:nil];
UINavigationController *searchNavController = [[UINavigationController alloc] initWithRootViewController:advancedSearchFormVC];
</code></pre>

This is just one controller that is on the tabbar controller, replacing the advancedSearchFormVC at the same time. Then this nav controller was added to the array of controllers that got put onto the tabbar controller.

Sorry for any trouble, but this was one of those problems I can look directly at and not see it. I should have seen this earlier, because I had another nav controller already on the tabbar controller, and it was set up the same way.

Thanks for your assistance.

blocks|key|4244264|text|我以前也遇到过同样的问题。我用来向UIViewController添加UINavigationBar的代码如下：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4244265|UINavigationController+*nc+=+[[UINavigationController+alloc]+initWithRootViewController:self];
[self.view++addSubview:nc.view];|code-block|syntax|javascript|4244266|解决方案：|offset|length|style|BOLD|4244267|用你的UIViewController的属性检查器选中“想要全屏”复选框。|4244268|entityMap^0|0|0|0|5|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

I had the same problem before. The code I used to add UINavigationBar to UIViewController:

<pre><code>UINavigationController *nc = [[UINavigationController alloc] initWithRootViewController:self];
[self.view addSubview:nc.view];
</code></pre>

Solution: 
Check the box "Wants Full Screen" with Attributes inspector of your UIViewController.

blocks|key|4244298|text|实际上，问题是导航控制器总是希望为状态栏留出空间，即20像素的间隙。我四处寻找了一段时间，最后找到了这个有效的解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4244299|//nav+is+assumed+to+be+a+subclass+or+instance+of+UINavigationController
nav.view.frame+=+CGRectOffset(nav.view.frame,+0.0,+-20.0);
//you+can+then+add+the+navigation's+view+as+a+subview+to+something+else|code-block|syntax|javascript|4244300|我最初找到了一个解决方案，它对导航栏的视图进行了这种偏移，但它不起作用。当您对导航控制器的实际视图执行此操作时，它会起作用。|4244301|我使用这种技术将来自另一个nib的导航控制器添加到我的主nib的空视图中，这样我就可以将它作为子视图放置在主屏幕中的任何位置。通过使用空视图作为占位符，并在我的主笔尖上定位框架，我创建了一个单独的笔尖和类来管理导航，后者管理用于处理其屏幕的其他笔尖。通过这种方式，我可以解决经典的“如何在我的导航控制器上添加横幅、图像或自定义视图”的问题，而导航控制器具体来说是一个subview...in+iOS+5。|4244302|值得一提的是，我使用app委托来存储和访问所有其他控制器，因此它们被一个持久化实例保留，我可以从任何类访问它。在所有控制器的应用程序代理和viewDidLoad+Create实例中创建和合成一些属性。这样我就可以在以后的任何地方引用我的应用程序中使用的所有控制器，方法是添加：|4244303|//this+shows+how+to+store+your+navigation+controllers+in+the+app+delegate
//assumes+you've+added+2+properties+(UINavigationController*)"navController"+and+(UIViewController*)"rootController"+in+your+app+delegate
//...don't+forget+to+add+#import+"AppDelegate.h"+to+the+top+of+the+file

AppDelegate+*app+=+(AppDelegate*)[[UIApplication+sharedApplication]+delegate];
[app.navController+pushViewController:+app.rootController+animated:YES];
//now+apply+the+offset+trick+to+remove+the+status+gap
app.navController.view.frame+=+CGRectOffset(app.navController.view.frame,+0.0,+-20.0);|4244304|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

The problem is indeed that the navigation controller always expects to leave room for the status bar, which is the 20 pixel gap. I searched around for a while before I found this solution which works:

<pre><code>//nav is assumed to be a subclass or instance of UINavigationController
nav.view.frame = CGRectOffset(nav.view.frame, 0.0, -20.0);
//you can then add the navigation's view as a subview to something else
</code></pre>

I originally found an answer which did this offset to the navigationbar's view, but it didn't work. It works when you do it to the navigation controllers actual view.

I use this technique to add a navigation controller from another nib to an empty view of my main nib, so I can position it anywhere within the main screen as a subview. By using an empty view as a placeholder and positioning frame on my main nib, I create a separate nib and class to manage the navigation, which manages other nibs used to handle their screens. This way I can solve the classic "how do I add a banner, image, or custom views above my navigation controller" while having a navigation controller as a subview...in iOS 5 to be specific.

It's also worth mentioning that I use the app delegate to store and access all the other controllers, so they are retained by a persistant instance which I can access from any class. Create and synthesise some properties in the app delegate of all your controllers, and in viewDidLoad create instances. That way I can reference all the controllers used in my app later anywhere by adding:

<pre><code>//this shows how to store your navigation controllers in the app delegate
//assumes you've added 2 properties (UINavigationController*)"navController" and (UIViewController*)"rootController" in your app delegate
//...don't forget to add #import "AppDelegate.h" to the top of the file

AppDelegate *app = (AppDelegate*)[[UIApplication sharedApplication] delegate];
[app.navController pushViewController: app.rootController animated:YES];
//now apply the offset trick to remove the status gap
app.navController.view.frame = CGRectOffset(app.navController.view.frame, 0.0, -20.0);
</code></pre>

blocks|key|334372|text|正如我们现在所知道的，20像素的偏移是为了给顶部的状态栏提供空间。但实际上，视图控制器坐标系保持不变，只有导航栏框架向下移动了20个像素。这使得导航栏实际上与视图的顶部20个像素重叠。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|334373|记录导航栏框架原点，它将显示(0.0，20.0)|334374|因此，解决方案是在ViewWillAppear中将导航栏的原点重新定位为(0.0，0.0)。|334375|self.navigationController.navigationBar.frame+=+CGRectMake(0.0,+0.0,+self.navigationController.navigationBar.frame.size.width,+self.navigationController.navigationBar.frame.size.height);|code-block|syntax|javascript|334376|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

As we all know by now, the 20 pixel shift is to provide space for the Status bar on the top.
But infact, the view controllers coordinate system is kept in place and only the navigation bar frame is shifted down by 20 pixels. This makes the navigation bar to actually overlap the top 20 pixels of the view.

Logging the navigation bars frame origin, it will show (0.0, 20.0)

So the solution is to simply reposition the navigation bar's origin to (0.0, 0.0) in ViewWillAppear.

<pre><code>self.navigationController.navigationBar.frame = CGRectMake(0.0, 0.0, self.navigationController.navigationBar.frame.size.width, self.navigationController.navigationBar.frame.size.height);
</code></pre>

blocks|key|334393|text|您可以尝试在UIViewController的Top+Bar+unchecked+from+Attributes部分下设置attribute+。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|334394|entityMap^0|V|9|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

You can try to set the attribute Under Top Bars unchecked from Attributes section of UIViewController.

blocks|key|4244387|text|问题是应该将UINavigationController.view添加到顶视图中。只要找到最上面的一个，它就会工作得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4244388|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

The problem is that UINavigationController.view should be added to the top view.
Just find the top one and it will be working great.

This looked simple enough when I set it up, but I can't explain why this gap is present between the status bar and the navigation bar. Also, the contained view looks like it may be properly aligned, and it's just the nav bar that is shifted down. The gap looks like the size of the status bar, so I expect that has something to do with it, but I don't know what.

<img src="https://i.stack.imgur.com/0hRn6.png" alt="Nav Bar with extra space">

Here is the code for setting up the navigation controller:

<pre><code>- (void)viewDidLoad
{
 [super viewDidLoad];

 advancedVC = [[AdvancedSearchFormVC alloc] initWithNibName:@"AdvancedSearchForm" bundle:nil];
 UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:advancedVC];
 nav.navigationBar.tintColor = [UIColor defaultNavBarTint];
 nav.navigationBar.topItem.title = NSLocalizedString(@"SearchTitle", nil);
 UIBarButtonItem *searchButton = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"SearchButton", nil) style:UIBarButtonItemStylePlain target:self action:@selector(refreshPropertyList:)]; 
 nav.navigationBar.topItem.rightBarButtonItem = searchButton;

 self.view = nav.view;
}
</code></pre>

The rootViewController uses a view from a xib file, where I have simulated the status bar, the navigation bar, and the tab bar.

UINavigationController has extra status bar gap at top

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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当我设置它时，这看起来很简单，但我无法解释为什么状态栏和导航栏之间存在这种差距。此外，所包含的视图看起来可能是正确对齐的，只是导航栏向下移动。差距看起来像状态栏的大小，所以我想这与它有关，但我不知道是什么。​​下面是设置导航控制器的代码：- (void)viewDidLoad{    [super viewDidLoa...

问UINavigationController顶部有额外的状态栏间隙
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