Running Two Alamofire Requests in Sequence Swift - swift

Question

I am using Async library found here in order to wait for first alamofire request to complete before running my second from the ViewDidLoad. The library seems simple to use but I can never get the first request to wait. My code is as follows:
let group = AsyncGroup()
group.utility
{
self.getToken()
}
group.wait()
self.getDevices()
I would like the getToken function to complete the Alamofire request and its completion handler before moving on to the getDevices request. Both are very simple Alamofire requests.
EDIT:
This is the getToken request. The token variable is not getting updated with the alamofire response before second alamofire request is being called.
func getToken()
{
let httpheader: HTTPHeaders =
[
"Content-Type": "application/json"
]
// Dev
let param = [params here]
Alamofire.request("url", method: .post, parameters: param, encoding: JSONEncoding.default, headers:httpheader).validate()
.responseData { response in
switch response.result {
case .success:
if let data = response.data {
let xml = SWXMLHash.parse(data)
token = (xml["authResponse"] ["authToken"].element?.text)!
}
case .failure:
print ("error")
}
}
}

Answer 1

Your getToken looks more like:
func getToken(whenDone:(String?)->()) {
let httpheader: HTTPHeaders = [
"Content-Type": "application/json"
]
// Dev
let param = [params here]
Alamofire.request("url", method: .post, parameters: param, encoding: JSONEncoding.default, headers:httpheader).validate()
.responseData { response in
switch response.result {
case .success:
if let data = response.data {
let xml = SWXMLHash.parse(data)
token = (xml["authResponse"] ["authToken"].element?.text)!
whenDone(token)
}
case .failure:
print ("error")
whenDone(nil)
}
}
}
and the calling sequence just becomes:
getToken() { token ->
guard let token = token else {
return
}
getDevices()
}