Recently, I came across some strange thing in my application. I do not know if this is a mistake, but it is annoying.
I have a hierarchy of views, as in the screenshot below:
... and when I move my application to the background (clicking on the home button) a black dull value appears below UINavigationBar. Of course, he remains in task switching mode (screenshot below). I do not know what caused this error, and, of course, I do not know how to get rid of this.
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