Trying to Hide iPhone Status Bar White Space

I have a scroll-view with a UIImage on top the UIImage has its own view controller class and the scroll view is on the main root-controller. I added the hide status bar method to the root-controller but when开发者_如何学JAVA I run the program the status bar disappears but leaves a white space and the view does not grow over the status bar white space. I tired other methods but I still get the same white space I also tried to enable scroll vertical and it looks like the status bar is on top of all my views, when I scroll up it keeps going up under the status bar.

What could be causing this?

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You just hid the status bar, seems like other components did not automatically expand to take over that space. Make sure you have "auto-resize subviews" enabled in all components under main root-controller.

If that doesn't help, you could try relocating and resizing your view in code. Something like:

CGRect frame = self.view.frame;
frame.origin.y -= statusBar.height;
frame.size.height += statusBar.height;
self.view.frame = frame;

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I had this same issue I was able to fix it by adding a call to,

// Where self == Your View Controller with the status bar hidden 
[self setWantsFullScreenLayout:YES];

Then I placed this in my init method of the View Controller where the status bar is hidden. I then added the following code to the view did load or the view will load method.

if ([[UIApplication sharedApplication] respondsToSelector:@selector(setStatusBarHidden:withAnimation:)]) {
    [[UIApplication sharedApplication] setStatusBarHidden:hide withAnimation:NO];
} else {  // Deprecated in iOS 3.2+.
    id sharedApp = [UIApplication sharedApplication];  // Get around deprecation warnings.
    [sharedApp setStatusBarHidden:hide animated:NO];
}

This will allow you to have a view controller with a status bar and one without. The photo app does this for example.

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Just a follow-up on JOMs helpful solution with a dynamic statusBar height (no one should rely on a status bar being 20px as indicated a comment):

// fix frame
CGRect frame = window.frame;
if( ! [UIApplication sharedApplication].statusBarHidden ) {
    int statusBarHeight = [UIApplication sharedApplication].statusBarFrame.size.height;
    frame.origin.y += statusBarHeight;
    frame.size.height -= statusBarHeight;
}
self.view.frame = frame;

btw: in my case I needed to recalculate the frame and adapt it to a visible status bar.