How to get blurry dominant image color on like Snapguide

Question

I'm looking to achieve an effect like this one in Snapguide:

They are getting main image color and blurring (not sure, but I looks like they are) it somehow. I think I saw somewhere that there is a similar option available in iOS 8, but I couldn't find it anywhere. So does anyone know how they do it, or how can I get a similar effect?

Also to note, I'm working on new Xcode for iOS 7 & 8 in Swift, but I don't think that matters much.

Answer 1

To extract the dominant image color, check out ColorArt.

Once you get the dominant color, try setting the tint color of a UIVisualEffectView to the required color. Init the VisualEffectView with a UIBlurEffect.

let blur = UIVisualEffectView(effect: UIBlurEffect(style: UIBlurEffectStyle.Light))
blur.tintColor = /* yourColor */
blur.frame = view.frame
view.addSubview(blur)