Alamofire: Network calls not being run in background thread

[ghost]

I know that Alamofire does network calls by default on a background process, so I tried running this code:

let productsEndPoint: String = "http://api.test.com/Products?username=testuser"

        Alamofire.request(productsEndPoint, method: .get)
            .responseJSON { response in
                // check for errors
                guard response.result.error == nil else {
                    // got an error in getting the data, need to handle it
                    print("Inside error guard")
                    print(response.result.error!)
                    return
                }

                // make sure we got some JSON since that's what we expect
                guard let json = response.result.value as? [String: Any] else {
                    print("didn't get products as JSON from API")
                    print("Error: \(response.result.error)")
                    return
                }

                // get and print the title
                guard let products = json["products"] as? [[String: Any]] else {
                    print("Could not get products from JSON")
                    return
                }
                print(products)`

The GET request is made perfectly, however, the UI is unresponsive; so I tried using GCD and putting the GET request on a background thread:

let queue = DispatchQueue(label: "com.test.com", qos: .background, attributes: .concurrent)

    queue.async {
        let productsEndPoint: String = "http://api.test.com/Products?username=testuser"
        Alamofire.request(productsEndPoint, method: .get)
            .responseJSON { response in
                // check for errors
                guard response.result.error == nil else {
                    // got an error in getting the data, need to handle it
                    print("Inside error guard")
                    print(response.result.error!)
                    return
                }

                // make sure we got some JSON since that's what we expect
                guard let json = response.result.value as? [String: Any] else {
                    print("didn't get products as JSON from API")
                    print("Error: \(response.result.error)")
                    return
                }

                // get and print the title
                guard let products = json["products"] as? [[String: Any]] else {
                    print("Could not get products from JSON")
                    return
                }
                print(products)

        }
    }

and the UI is still unresponsive

[ejensen]

My guess is the response handling is what's blocking the UI. By default the response handler is run on the main queue. Try setting your custom queue in the response parameter:

.responseJSON(queue: queue) { response in
...
}

[ghost]

@ejensen Thank you. That solved my issue.

[girishghoda]

@cnoon @ejensen Hi , I have issue with queue passing in response

let serialQueue = DispatchQueue(label: "name", qos: .background)

Alamofire.request(request)
.responseJSON(queue: serialQueue){ response in

//this block not fire after pass queue
}
any idea,
Thank you

[gpalomar]

Same thing as @girishghoda 😕