Invert the color of a UIView and all its subviews

Question

Is it possible to invert the color of a UIView or UIScrollView and all its subviews in iOS?

If so how can I accomplish this?

Isn't this basically a repeat of [your previous question](http://stackoverflow.com/questions/24835874/inverting-the-colors-of-a-uiscrollview)? — rmaddy, Jul 19 '14 at 15:24

score -1 · Answer 1 · edited May 23 '17 at 12:09

-1

First, you need to create an inverted color of current background color of UIView. You can learn more about how to accomplish it on this StackOverflow question — How to get inverse color from UIColor?

Then, you need to iterate over all UIView subviews and apply inverted color as a background.

view.backgroundColor = invertedColor;
for (UIView *subview in view.subviews) {
    subview.backgroundColor = invertedColor;
}

edited May 23 '17 at 12:09

Community

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answered Jul 19 '14 at 14:50

Rinat Khanov

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What if the UIView contains a PDF? and not just a background color? – user906357 Jul 19 '14 at 14:57

Invert the color of a UIView and all its subviews

1 Answers1