Checking Http Status Swift4 - swift4

Question

I'm a bit confused about credentials and HttpStatus.
I'm making a login page in Swift 4/XCode9, that connects to an api.
Here is what I do when the login button is tapped:
#IBAction func loginTapped(_ sender: Any) {
let loginString = String(format: "%#:%#", usernametext.text!, passwordtext.text!)
let loginData = loginString.data(using: String.Encoding.utf8)!
let base64LoginString = loginData.base64EncodedString()
var Base = base64LoginString
let url = URL(string: "SOME URL")!
var request = URLRequest(url: url)
request.addValue("Basic \(Base)", forHTTPHeaderField: "Authorization")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data, error == nil else {
print("\(error)")
return
}
if let httpStatus = response as? HTTPURLResponse {
print("status code = \(httpStatus.statusCode)")
}
}
task.resume()
view.endEditing(true)
}
Everything works fine but I don't know how to check the httpstatus.
If I get wrong credentials I want to stay on the login page and not perform segue to the next view.

Answer 1

Try this code
func checkStatusCode(response:URLResponse?) -> Bool {
guard let statusCode = (response as? HTTPURLResponse)?.statusCode else {
print("Invalid Response")
return false
}
if statusCode != 200 {
print("Invalid File")
return false
}
return true
}
Usage:
if (self.checkStatusCode(response: response)) {
DispatchQueue.main.async {
self.performSegue(withIdentifier: "showW", sender: self)
}
} else {
//added an alert
}