NOTE: A new iOS 9 kit for Illustrator AND Sketch is now available.
Download and more info here: http://mercury.io/blog/free-ios-9-3-iphone-ui-kit-for-illustrator-and-sketch
Or go here to like on Dribbble and view a larger preview: https://dribbble.com/shots/2590537-Free-iOS-9-3-iPhone-UI-Kit-for-Illustrator-and-Sketch
We updated our iOS Illustrator vector UI kit to coincide with the launch of iOS 8 today. It should cover most, if not all, of your iOS 8 comping needs.
Read more and download the file here: http://mercury.io/blog/ios-8-illustrator-vector-ui-kit-update