Cannot get result while I use Alamofire - swift

Question

I am using Alamofire version 3.1.5 with my xCode version 7.3. I tried it on many apps of mine. But I do not get any result. No error is seen before the execution. My code is like this:
var apiUrl : String
var alamoFireManager:Manager!
var configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
init(apiUrl : String){
self.apiUrl = apiUrl
configuration.timeoutIntervalForRequest = 30.0
alamoFireManager = Alamofire.Manager(configuration: configuration)
}
print(apiUrl)
alamoFireManager.request(.GET, apiUrl, encoding: .JSON).validate(contentType: ["application/json"]) .responseJSON { response in
print(response.result.value)
switch response.result{
case .Success:
if let value = response.result.value{
let json = JSON(value)
print (json)
callback.onResponse(value) // this is where my value is sent
}
case .Failure(let error):
print(error.localizedDescription)
}
}
I checked using breakpoint and the app directly reaches this last braces frm the alamofire line.

Answer 1

I think the issue is you are not calling resume(). From the Alamofire doc
If the owning manager does not have startRequestsImmediately set to
true, the request must call resume() in order to start.
try this
alamoFireManager.request(.GET, apiUrl, encoding: .json).validate(contentType: ["application/json"]).resume().responseJSON { response in
print(response.result.value)
switch response.result{
case .Success:
if let value = response.result.value{
let json = JSON(value)
print (json)
callback.onResponse(value) // this is where my value is sent
}
case .Failure(let error):
print(error.localizedDescription)
}
}