How to show message when Task fails due to Timeout - swift

Question

I need a clean way for this example to print("ERROR") when the task ends due to the timeout.
func getUserDataService() -> Bool{
var getDataStatus = false
//Create the url with NSURL
let url = URL(string: "http://someurl")! //change the url
//Create the session object
let session = URLSession.shared
//Now create the URLRequest object using the url object
var request = URLRequest(url: url)
request.httpMethod = "GET"
request.timeoutInterval = 15
//create dataTask using the session object to send data to the server
let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in
guard error == nil else {
return
}
guard let data = data else {
return
}
do {
//create json object from data
if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any] {
if let httpResponse = response as? HTTPURLResponse {
if httpResponse.statusCode == 200 {
getDataStatus = true
} else {
}
}
}
} catch let error {
print(error)
}
})
task.resume()
return getDataStatus
}
It prints the following when it fails, but I'm not sure where to control this.
2019-05-27 13:53:58.501322-0400 AppName[60195:841789] Task <AB410EF3-5520-44AD-A458-DD75D1F6AD09>.<3> finished with error - code: -1001
2019-05-27 13:53:58.505525-0400 AppName[60195:842001] Task <AB410EF3-5520-44AD-A458-DD75D1F6AD09>.<3> HTTP load failed (error code: -999 [1:89])

Answer 1

Please read the documentation URL Loading System Error Codes. The timeout error is -1001 aka NSURLErrorTimedOut
The error is returned in the completion handler of the data task. Handle it!
let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in
if let nserror = error as NSError?,
nserror.code == NSURLErrorTimedOut {
// do something
return
}
Apart from that you cannot return a Bool value from that method, you have to add a completion handler
func getUserDataService(completion: #escaping (Bool) -> Void) {
...
And call
completion(true)
and delete
return getDataStatus