Space above Navigation Controller Navigation Bar

Question

Space above Navigation Controller Navigation Bar

So I am using a Navigation controller in a sub view of my main view. When the view for that navigation controller draws it draws as if it had a 20 pixel pad for the status bar. But there is no notion of a status bar in the middle of my application. The only way, I have found, to work around this is to fake it by moving the UIView that is hosting the navigation control up 20 pixels and setting it to [UIColor clearColor.]

As my app becomes more complex managing this magic 20 pixels is becoming difficult, anyone have a notion on how to make the navigation control not pad for the status bar?

iphone, Mac OS X (10.5.3), iphone UINavigationController

Posted on Jun 6, 2008 12:34 PM

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Answer 1

Jun 6, 2008 12:37 PM in response to Geoffrey Peart

What are you using as the frame when creating the view? I just posted something related, using the applicationFrame property in UIScreen introduced the gap for me, using bounds instead worked.

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Answer 2

SystemR

Level 1

0 points

Jun 9, 2008 2:54 AM in response to Geoffrey Peart

I'm having the same problem. I ran the example and somehow this line:

CGRect appFrame = [[UIScreen mainScreen] applicationFrame];

gave me:
appFrame.origin.x = 0
appFrame.origin.y = 0

on the console. While my app gave me that 20 pixel gap with:
appFrame.origin.x = 0
appFrame.origin.y = 20

-----
I modified the plist to hide status bar, that 20 pixel gap is now gone.

Message was edited by: SystemR

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Answer 3

Jun 9, 2008 8:00 AM in response to SystemR

The problem is that the Application frame isn't the frame that I am using.

Imagine a larger application, nested inside that application is a way to expose a view that only takes up a portion of the screen, not all of it. So that view has its own vertical upper limit that is already below the system status bar (which I actually want.) Within that view I have a Navigation Controller that navigation controller is bound to the top of that view. The navigation controller is creating a 20 pixel space, then the nav bar, and then the content view. Artificially lowering the top of the view by 20 pixels.

I can work around this though a lot of crazy coordinate manipulation, but it would be simpler if I could just tell the navigation controller to not automatically adjust. Frustrating...

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Answer 4

Aug 1, 2008 8:29 AM in response to Geoffrey Peart

Did you ever solve this? I have the exact same problem. My nav controller puts a space above it if it is a subview of another view.

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Answer 5

megolden

Level 1

45 points

Aug 4, 2008 9:15 AM in response to Geoffrey Peart

I too am experiencing this problem.. just created a simple project using the utility application template. If I hide the status bar, (using Info.plist UIStatusBarHidden) and hide the bars in IB, the status bar does not appear, but the 20 pixels at the top of the screen is unresponsive to touch, so for example, only the bottom half of the Done button on the flipside gets touched.

Is there some other rect I should be adjusting?

thanks
michael

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Answer 6

lsal

Level 1

19 points

Aug 12, 2008 5:25 AM in response to megolden

I'd love to know the answer to this. I wonder if it's just a bug in the SDK.

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Answer 7

MacMunk

Level 1

0 points

Aug 16, 2008 11:52 PM in response to lsal

has anyone found an answer?
I have been looking at this issue all day long... whew!

this white spaced gap only occurs within my IB created TabBarController ViewControllers. When I am outside of the TabBarController, everything works fine and the "gap" is gone. I tried to get rid of the IB approach and write code... but got the same issues. To explain it visually... I have the
Navigation Bar
the "gap"
ViewController (called within IB TabBarController)
the tabbar.

Any direction would be appreciated.

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Answer 8

Aug 17, 2008 12:08 AM in response to Geoffrey Peart


- (void)viewDidLoad {
 CGRect frame = navController.view.frame;
 frame.origin.y = 0.0;
 navController.view.frame = frame;
}

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Answer 9

Aug 17, 2008 1:34 AM in response to Brent Royal-Gordon

Perhaps Apple thinks that if you are using a navigation bar, you should not be hiding the status bar? What reason do you have for wanting the navigation bar without the status bar? Fully custom interfaces clearly don't need the status bar, but for UIKit apps I don't see a reason to hide it.

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Answer 10

Aug 17, 2008 2:57 AM in response to Carsten Whimster

My application doesn't hide the status bar. It's just embedding the navigation controller inside another view controller (in this case, the RootViewController from the Utility Application template).

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Answer 11

Xanthos

Level 3

540 points

Aug 18, 2008 9:05 PM in response to Geoffrey Peart

Geoffry,

Can you tell me about the view controller and view hierarchy in the simplest case where this occurs?

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Answer 12

Aug 19, 2008 2:51 PM in response to Brent Royal-Gordon

It occurs to me that under some circumstances, the origin for drawing controls is reset to the parent control's upper left corner. If that parent is already a view which takes the status bar into account, then that might explain the extra space. Could that be the case here?

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Answer 13

Xanthos

Level 3

540 points

Aug 19, 2008 3:00 PM in response to Carsten Whimster

Something like that - I'm sure it has to do with how IB sets things up. This was a problem for me with certain types of nested views - I changed the way I structure my views in IB and all is well. Since I'm not 100% sure of the cause I was hoping someone that has an example of this problem could post their controller and view hierarchy.

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