How to detect the color of an UIImage in iOS

Question

I have a view like this :

The left back button & the right button is basically two white image (set in UIButton) with a particular opacity. Now it's look more or less visible on this background cover photo.

But if I change the background cover photo with something else, where the opacity & color of that cover image is closer to the two button's image, then it's difficult to see those two button.

Like this:

So I just wondering, Is there any way, so that I can detect the color of my cover image and I can change those two buttons image or color according to it?

Any kind of reference or guidance would be very much appreciable.

try this link http://stackoverflow.com/questions/3284185/get-pixel-color-of-uiimage — Anbu.Karthik, Jul 29 '15 at 05:59
yoe set black color with alpha 60% because image is transparent not detect color. — Dharmesh Dhorajiya, Jul 29 '15 at 06:01

score -1 · Answer 1 · answered Jul 29 '15 at 15:59

-1

I think you can use this function to determinate how light/dark is the background. Calculate an average of several pixel under your button.

Have fun! :D

answered Jul 29 '15 at 15:59

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How to detect the color of an UIImage in iOS

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