How do I add a dark screen that covers all other views (including navigation bar and status bar)?

Question

I want to add a dark screen over all my views, and then present a notification window above it, like in Tweetbot 3:

However, I'm not totally sure how this is accomplished.

Adding a dark view with the size of the screen as its frame does not work, as below: (navigation bar and status bar aren't covered)

UIView *darkOverlay = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];
darkOverlay.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.5];
[self.view insertSubview:darkOverlay behindSubview:self.view];

This covers everything except the status bar (so it comes pretty close, but as I have light status bar content it's still very jarring):

[[[UIApplication sharedApplication] keyWindow] addSubview:darkOverlay];

So how is something like this accomplished?

Answer 1

You can try this method

    UIWindow* window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    window.windowLevel = UIWindowLevelAlert;
    window.opaque = NO;

    [window addSubview:someView];

    // window has to be un-hidden on the main thread
    [window makeKeyAndVisible];

Where "view" - is your custom popup.

Answer 2

You have to do this:

CGRect screenRect = [[UIScreen mainScreen] bounds];
_darkCoverView = [[UIView alloc] initWithFrame:screenRect];
_darkCoverView.backgroundColor = [UIColor blackColor];
_darkCoverView.alpha = 0.5;

[[[[UIApplication sharedApplication] delegate] window] addSubview:_darkCoverView];

It works for me, and the status bar is covered as well :)