Using URLSession for network requests in Swift allows you to interact with web services and fetch data asynchronously. Here’s a basic guide on how to use URLSession for making network requests:

1. Create URLSession Instance: Begin by creating a URLSession instance. You can use either a shared session or create a custom session based on your requirements.

let session = URLSession.shared

Create URL and URLRequest: Define the URL for the API endpoint you want to interact with and create a URLRequest object with the URL. Optionally, you can configure the request further with additional properties such as HTTP method, headers, and body.

if let url = URL(string: "https://api.example.com/data") {
    var request = URLRequest(url: url)
    request.httpMethod = "GET" // or "POST", "PUT", etc.
    // Configure additional request properties if needed
}

Create Data Task: Use the URLSession instance to create a data task with the URLRequest. This task will handle the network request asynchronously.

let task = session.dataTask(with: request) { data, response, error in
    // Handle response and error
    if let error = error {
        // Handle error
        print("Error: \(error.localizedDescription)")
        return
    }

    guard let httpResponse = response as? HTTPURLResponse, (200...299).contains(httpResponse.statusCode) else {
        // Handle invalid response
        print("Invalid response")
        return
    }

    if let data = data {
        // Parse and process the received data
        // Example: Decode JSON data
        do {
            let decodedData = try JSONDecoder().decode(MyModel.self, from: data)
            // Process decoded data
        } catch {
            // Handle decoding error
            print("Decoding error: \(error)")
        }
    }
}

Resume Data Task: After creating the data task, call the resume() method to start the network request.

task.resume()

1. Handle Response: Inside the completion handler of the data task, handle the response data, HTTP status codes, and any errors that occur during the network request.
   • If data is not nil, process the received data (e.g., JSON parsing).
   • Check the HTTP status code to ensure the request was successful (e.g., status code 200 for success).
   • Handle any errors that occurred during the request.