Ambigious reference to member in Swift 2 - swift

Question

I want to create a generic Network Operation class to handle the communication to my server. I tested a few things and the error must be the responseArrayfunction. But I don't know where?
class NetworkOperation<T> {
let requestType: NSMutableURLRequest
var arrayItems: Array<T>?
typealias JSONDictionaryCompletion = ([String:AnyObject]?) -> Void
typealias ObjectArrayCompletion = (Response<[T], NSError>) -> Void
init(requestType: NSMutableURLRequest, arrayItems: Array<T>) {
self.requestType = requestType
self.arrayItems = arrayItems
}
func downloadJSONFromURL(completion: JSONDictionaryCompletion) {
}
func downloadObjectsFromURL(completion: ObjectArrayCompletion) {
Alamofire.request(requestType).responseArray { (response) in
if let httpResponse = response, let statusCode = httpResponse.response {
switch(statusCode) {
case 200:
print("OK")
}
}
}
}
}
extension Alamofire.Request {
// responseObject<...>(...) declares a new .responseX handling function on Alamofire.Request. It uses the responseSerializer as a custom serializer.
// The <T> means this is a genertic method: it can work with different types of objects. These types must implement the ResponseJSONObjectSerializable protocol.
// This is needed to guarantee that any type of object that will be passed in will have an init function that takes JSON. The response function takes a single
// argument called completionHandler. This is the method being called when done parsing the JSON and creating the object to be called async.
// The completion handler has a single argument Response<T, NSError>. The response object packs up the Result along iwth all the other info from the transaction.
// The responseObject function returns an Alamofire.Request object
public func responseObject<T: ResponseJSONObjectSerializable>(completionHandler: Response<T, NSError> -> Void) -> Self {
// Create the response serilaizer that will work with the generic T type and an NSError. It will take in the results of the URL Request (request, response, data, error)
// and use the Result type defined by Alamofire to return success with the object or failure with an error. The responseObject just returns the responseserializer that gets created
// and allows passing the completion handler where it needs to go.
let serializer = ResponseSerializer<T, NSError> { (request, response, data, error) in
// Checks that it has valid data using guard. Then it turns the data into JSON and parses it using SwiftyJSON.
// Then it creates a new copy of the type of class.
guard error == nil else {
return .Failure(error!)
}
guard let responseData = data else {
let failureReason = "Object could not be serialized because input data was nil."
let error = Error.errorWithCode(.DataSerializationFailed, failureReason: failureReason)
return .Failure(error)
}
let JSONResponseSerializer = Request.JSONResponseSerializer(options: .AllowFragments)
let result = JSONResponseSerializer.serializeResponse(request, response, responseData, error)
switch result {
case .Success(let value):
let json = SwiftyJSON.JSON(value)
// Get Data content of JSON
let jsonData = json["data"]
if let object = T(json: jsonData) {
return .Success(object)
} else {
let failureReason = "Object could not be created from JSON."
let error = Error.errorWithCode(.JSONSerializationFailed, failureReason: failureReason)
return .Failure(error)
}
case .Failure(let error):
return .Failure(error)
}
}
return response(responseSerializer: serializer, completionHandler: completionHandler)
}
// Iterate through the elements in the json and create object out of each one and add it to the objects array.
public func responseArray<T: ResponseJSONObjectSerializable>(completionHandler: Response<[T], NSError> -> Void) -> Self {
let serializer = ResponseSerializer<[T], NSError> { request, response, data, error in
guard error == nil else {
return .Failure(error!)
}
guard let responseData = data else {
let failureReason = "Array could not be serialized because input data was nil."
let error = Error.errorWithCode(.DataSerializationFailed, failureReason: failureReason)
return .Failure(error)
}
let JSONResponseSerializer = Request.JSONResponseSerializer(options: .AllowFragments)
let result = JSONResponseSerializer.serializeResponse(request, response, responseData, error)
switch result {
case .Success(let value):
let json = SwiftyJSON.JSON(value)
// Get Data content of JSON
let jsonData = json["data"]
var objects: [T] = []
for (_, item) in jsonData {
if let object = T(json: item) {
objects.append(object)
}
}
return .Success(objects)
case .Failure(let error):
return .Failure(error)
}
}
return response(responseSerializer: serializer, completionHandler: completionHandler)
}
}
But when I want to check the status code in the downloadObjectsFromURL function, I get the compiler error message:
Ambigious Reference to member 'request(::parameters:encoding:headers:)'
Where does this error come from. Did I unwrap the optionals in a wrong way?
UPDATE
I tested this:
func createObjectsFromJSON(completion: ObjectArrayCompletion) {
Alamofire.request(requestType).responseArray { (response: Response<[AED], NSError>) -> Void in
print("OK")
}
}
AED is a custom class I created. No error message anymore. When I switch AED to T this error pops up
func createObjectsFromJSON(completion: ObjectArrayCompletion) {
Alamofire.request(requestType).responseArray { (response: Response<[T], NSError>) -> Void in
print("OK")
}
}
expected argument type Response<[_], NSError> -> Void