Can you explain what URLSession is and how it is used for network requests in iOS?

URLSession is a class in iOS used for performing network requests, such as downloading data from web servers or sending data to a server.

It allows creating tasks for downloading or uploading data asynchronously, which does not block the main thread of the application.

Example of using URLSession to download data:

let url = URL(string: "https://api.example.com/data")!
let task = URLSession.shared.dataTask(with: url) { data, response, error in
    if let data = data {
        // Handling received data
        print("Data received: \(data)")
    } else if let error = error {
        print("Error: \(error.localizedDescription)")
    }
}
task.resume() // Starting the task

Thus, URLSession simplifies working with HTTP requests and allows efficient management of network operations in iOS applications.