Xcode 8 Objective-C category warning

Question

I\'m using Xcode 8 and Swift 3.0. What does this error message mean?

ld: warning: Some object files have incompatible Objective-C category definition

Answer 1

I was able to solve my problem when I changed the "class var" to "class func":

There was:

class var applicationVersionNumber: String {
    if let version = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String {
        return version
    }
    return "Version Number Not Available"
}

Has become:

class func applicationVersionNumber() -> String {
    if let version = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String {
        return version
    }
    return "Version Number Not Available"
}

Source: https://forums.developer.apple.com/message/146579#146579

Answer 2

Google Analytics pod

In Build Settings -> Other Linker Flags if you have the -ObjC on -l"GoogleAnalytics" flag this warning will appear. I don`t know why or how to resolve, but can be your problem too.