Xcode 8 Objective-C category warning

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I also had this issue in a UIColor extension, my app is entirely made with swift except for some frameworks that use Objective-c so I have no problem in declaring the var as @nonobjc:

extension UIColor {
   @nonobjc static var lol: UIColor {
      return UIColor.red
   }
}

From the apple docs:

The nonobjc attribute tells the compiler to make the declaration unavailable in Objective-C code…

Since this code is unavailable to Objective-C the warning disappears.

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