iOS - is your Custom Keyboard enable?

isCustomKeyboardEnabled

    func isCustomKeyboardEnabled() -> Bool {
        let bundleID: String = "com.app.smappikeyboard.child"
        // Replace this string with your custom keyboard's bundle ID
        NSUserDefaults.standardUserDefaults().dictionaryRepresentation()
        let keyboards: [String] = NSUserDefaults.standardUserDefaults().dictionaryRepresentation()["AppleKeyboards"]! as! [String]
        // Array of all active keyboards
        for keyboard: String in keyboards {
            print("keyboard",keyboard)
            if (keyboard == bundleID) {
                return true
            }
        }
        return false
    }