Handle timeout with Alamofire

You can compare error._code and if it is equal to -1001 which is NSURLErrorTimedOut then you know this was a timeout.

let manager = Alamofire.SessionManager.default
manager.session.configuration.timeoutIntervalForRequest = 120

manager.request("yourUrl", method: .post, parameters: ["parameterKey": "value"])
        .responseJSON {
            response in
            switch (response.result) {
            case .success: // succes path 
            case .failure(let error):
                if error._code == NSURLErrorTimedOut {
                    print("Request timeout!")
                }
            }
        }