ios – error response decoding and passing into alert

September 30, 2022

1

I’m making a easy login app with customized error message show in an alert for API response failure. Under is my code

  @State personal var username = ""
  @State personal var password = ""
  @State personal var isPresentederror = false
var physique: some View {
        NavigationView{
            ZStack{
                VStack{
                   
                        
                    TextField("Username", textual content : $username)
                        .autocapitalization(.none)
                        .padding()
                        .body(width:300,top: 50)
                        
                    SecureField("Password", textual content : $password)
                        .padding()
                        .body(width:300,top: 50)
                        
                    Button("Login"){
                        authenticateUser(username: username, password: password)
                    }
                    
                    .foregroundColor(.white)
                    .body(width: 300, top: 50)
                    .background(Shade.blue)
                    .cornerRadius(10)
                   
                    .alert("Error", isPresented: $isPresentederror, actions: {
                      
                    }, message: {
                        Textual content("One thing went flawed! Please strive once more")
                    })

                }
            }
            .navigationBarHidden(true)
        }        
    }

on Click on of LOGIN button I’m calling a operate authenticateUser by passing username and password as a parameter
Under is my authenticateUser operate code

func authenticateUser(username: String, password: String){
      
     
       
        let technique = "POST"
        let urlString = "http://myapi_to verify_username_password"
        
        var urlHeader=//header half goes right here
        
        let json: [String: Any] = ["password": password,
                                    "username": username]
         let jsonData = strive? JSONSerialization.information(withJSONObject: json)
         urlHeader.httpBody = jsonData

        URLSession.shared.dataTask(with: urlHeader) { (information, response , error) in
            
            guard let information = information else { return }
            print(String(information: information, encoding: .utf8) ?? "Invalid JSON")
            do {
                   //success code working high-quality
               } catch {
                   print("Error:(error.localizedDescription)")
                   print(error)
                   isPresentederror = true
               }
            }.resume()
        
    }

success is working high-quality for me, however on error I’m displaying an alert with handbook textual content “One thing went flawed! Please strive once more”.
I wish to present an error message coming from API.
the road

print(String(information: information, encoding: .utf8) ?? "Invalid JSON")

in above operate offers an object as under

{"timestamp":"2022-09-30T10:03:29.142+00:00","standing":501,"error":"Please confirm the information you've despatched Discovered","path":"path_to_url"}

I wish to present the error inside alert which is “Please confirm the information you’ve despatched Discovered” coming from API.
I attempted decoding it and UTF technique nevertheless it all the time offers me an error. so please assist me to attain this

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