Not getting json response on first click using alamofire - json

Question

I am using alamofire for getting JSON response.
When I click on the button for the first time, I am not getting response. I've checked after few times just to be sure that whether my internet speed is low. Internet speed is okay and still every time this happens, not entering in the if condition to print the response. Please help. Thanks in advance.!!
Below is my code
Alamofire.request(url).responseJSON { response in
if let JSON = response.result.value
{
let responseRes = JSON as? Dictionary<String,AnyObject>
print("Response = \(responseRes!)")
}
}

Answer 1

This will perfectly work in Swift 3.1
func testURL () {
let parameter = ["id": 19, "name": "", "image_name": "", "largeimage": "", "catdata": ["category_name"]] as [String: Any]
//Here parameter as per your web service.
//var parameter = [String : Any]()
//print("t:-\(parameter)")
guard let url = URL(string: "YourWebServiceURL") else { return }
var request = URLRequest(url: url)
request.httpMethod = "POST"
guard let httpBody = try? JSONSerialization.data(withJSONObject: parameter, options: []) else { return }
request.httpBody = httpBody
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
let session = URLSession.shared
session.dataTask(with: request) {(data:Data?, response:URLResponse?, error:Error?) in
if let response = response {
print(response)
do {
let json = try JSONSerialization.jsonObject(with: data!) as! [String: Any]
print(json["data"]!)
let dataarray = json["data"]! as! Array<Any>
for i in dataarray {
let webServiceArray = i as! [String : Any]
//Below all the Object as per you webService objects.
print(webServiceArray["name"]!)
print(webServiceArray["largeimage"]!)
print(webServiceArray["image_name"]!)
print(webServiceArray["id"]!)
}
} catch {
print("Error deserializing JSON: \(error)")
}
}
}
.resume()
}
Access this function in ViewDidLoad.