Resize for in-call status bar?

Question

How can I make my view resize in response to the in-call status bar from my nib?

I figured it would just be setting the resize properties, but they\'re not enabled f

Answer 1

You will have to update the views manually if you are setting your view frames programatically

 -(void) viewDidAppear:(BOOL)animated
{
    [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(statusBarFrameWillChange:)name:UIApplicationWillChangeStatusBarFrameNotification object:nil];

}

- (void)statusBarFrameWillChange:(NSNotification*)notification
{
// respond to changes
NSLog(@"STATUS BAR UPDATED");
NSDictionary *statusBarDetail = [notification userInfo];
NSValue *animationCurve = statusBarDetail[UIApplicationStatusBarFrameUserInfoKey];
CGRect statusBarFrameBeginRect = [animationCurve CGRectValue];
int statusBarHeight = (UIInterfaceOrientationIsPortrait([[UIApplication sharedApplication]statusBarOrientation])) ? statusBarFrameBeginRect.size.height : statusBarFrameBeginRect.size.width;

NSLog(@"status bar height  %d", statusBarHeight);
}

-(void) viewDidDisappear:(BOOL)animated
{
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationBackgroundRefreshStatusDidChangeNotification object:nil];
}

This gives you the new height of the status bar and using this you can update your frames accordingly.

Answer 2

A view may not resize automatically with status bar size changes if you do not have a root view controller set. I originally had this in my app delegate, and my app worked properly in all regards except that it would not resize correctly during phone calls.

[self.window addSubview:rootController.view];

I changed the above line to this, and now my app resizes automatically during calls.

[self.window setRootViewController:rootController];

I discovered this fix after seeing this in the log and investigating the cause.

Application windows are expected to have a root view controller at the end of application launch

Answer 3

The notification for status bar changing frame is

UIApplicationWillChangeStatusBarFrameNotification

Register as an observer:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(statusBarFrameWillChange:)name:UIApplicationWillChangeStatusBarFrameNotification object:nil];

Then respond to change in your handler:

- (void)statusBarFrameWillChange:(NSNotification*)notification { // respond to changes }

Even with autolayout setup correctly, you may need to respond to changes. For example, a table view that calculates its cell height based on the given space in the screen would may need to reloadData after the status bar changed.

Documentation

Answer 4

For views like UITableView you'll typically need to change the table cell height, and there's no other way to do it except to implement application:didChangeStatusBarFrame:. But it's no biggie, and you can set the row height to non-integer values if you need to.

Answer 5

What do you mean when you say that 'the resize properties aren't enabled for the root UIView'?

The in-call status bar doesn't have any particular special designation, and I don't think there are any APIs or notifications around it. Instead, your views should simply be set up to autoresize correctly.

Try creating a new navigation-based app in Xcode and study the autoresize settings on the table view in RootViewController.xib. Hopefully you'll see a delta between what Apple's set and what you've set in your project.

Answer 6

iOS will invoke your viewController's viewWillLayoutSubviews method whenever there is a change in status bar. You can override that and adjust your subviews according to the new bounds.

- (void)viewWillLayoutSubviews {
    // Your adjustments accd to 
    // viewController.bounds

    [super viewWillLayoutSubviews];
}