View got hidden below UINavigationBar iOS 7

Question

Earlier, I was using iOS 6.1 for my project. Recently I have switched to iOS 7. For, a lot of changes I knew, I updated my code.. But I have observed a strange behavior. My view on every screen gets hidden below navigation bar. Repositioning view solves the problem for iOS7, but creates problems for older iOS versions.

Can anyone explain me, what is the reason and why does it happen?? What has been changed in iOS 7 that's causing this problem??

Any help would be appreciated..

Answer 1

Look up this key: UIViewControllerBasedStatusBarAppearance.

It's used in your app's info PLIST file and will come up as:

View controller-based status bar appearance

This will allow you to control the status bar's appearance. There's a bunch of API changes for status bars, go have a look in the documentation for new UIViewController methods such as

- (void)prefersStatusBarHidden;

Answer 2

If you do not need translucent navigation bar in your app you can fix this on iOS7 and iOS6 without code changes.

In storyboard select your navigation controller and then open "Attributes Inspector". Then under "Simulated Metrics" set "Top Bar" to some value but not to "translucent":

Now your views on iOS6 and iOS7 will have the same positioning as before.

Answer 3

Point #7 on this list does the trick. You still have to wrap it in iOS 7-checking code like @null's answer:

float systemVersion = [[[UIDevice currentDevice] systemVersion] floatValue];
if (systemVersion >= 7.0) {
    viewController.edgesForExtendedLayout = UIRectEdgeNone;
}

The whole article is useful to those transitioning to iOS 7.

Answer 4

Use this property for your VC, in-order to avoid overlap of ur statusbar with your VC Swift :

self.edgesForExtendedLayout = []

Objective C

self.edgesForExtendedLayout = UIRectEdgeNone;

Answer 5

For me the best way for transparent Navigation Bar is to change the shadowImage and backgroundImage of the bar.

navigationController?.navigationBar.isTranslucent = true
navigationController?.navigationBar.backgroundColor = nil
navigationController?.navigationBar.setBackgroundImage(UIImage(named: "navBarBackground")?.resizableImage(withCapInsets: .zero, resizingMode: .stretch), for: .default)  
navigationController?.navigationBar.shadowImage = UIImage()

Answer 6

You can stop your views going under the navigation bar, in your viewController:

self.edgesForExtendedLayout = UIRectEdgeNone;