umeng_UDID_Swift3

        
        let cls = NSClassFromString("UMANUtil")
        let deviceIDSelector = Selector("openUDIDString")
        var deviceID: String? = nil
        if(cls != nil && cls!.responds(to: deviceIDSelector)){
            deviceID = (cls as? NSObjectProtocol)?.perform(deviceIDSelector).takeUnretainedValue() as? String
        }
        guard let jsonData = try? JSONSerialization.data(withJSONObject: ["oid":deviceID], options:  JSONSerialization.WritingOptions.prettyPrinted) else {
            print("Can't get UDID")
            return false
        }
        print(String.init(data: jsonData, encoding: .utf8)!)