URLSession delegate methods don't works - ios

Question

I'm going to read file from API, but its size equal 1.6mb and it takes so much time. I wish to read it by parts, and when i founds data which i needs, i'm going to stop recieve data. I trying to use some delegate methods, but they don't works. I don't understand what goes wrong?
I have next code:
class ViewController: UIViewController, URLSessionTaskDelegate, URLSessionDelegate, URLSessionDataDelegate {
var httpString = "hided"
override func viewDidLoad() {
super.viewDidLoad()
getLogBinData()
}
func getLogBinData() {
let session = URLSession(configuration: .default, delegate: self, delegateQueue: OperationQueue.main)
if let url = URL(string: httpString + "log.bin") {
var request = URLRequest(url: url)
request.httpMethod = "GET"
let task = session.dataTask(with: request)
task.resume()
}
}
func urlSession(_ session: URLSession, task: URLSessionTask, didSendBodyData bytesSent: Int64, totalBytesSent: Int64, totalBytesExpectedToSend: Int64) {
print()
}
func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
if dataTask.countOfBytesReceived >= 500 {
print(dataTask.countOfBytesReceived)
}
}
func urlSession(_ session: URLSession,
dataTask: URLSessionDataTask,
didReceive response: URLResponse,
completionHandler: #escaping (URLSession.ResponseDisposition) -> Void) {
if dataTask.countOfBytesReceived >= 500 {
print(dataTask.countOfBytesReceived)
}
}
}

Answer 1

according the comment, i edited code and it's worked.
class ViewController: UIViewController, URLSessionTaskDelegate, URLSessionDelegate, URLSessionDataDelegate {
var httpString = "hided"
override func viewDidLoad() {
super.viewDidLoad()
getLogBinData()
}
func getLogBinData() {
let session = URLSession(configuration: .default, delegate: self, delegateQueue: OperationQueue.main)
if let url = URL(string: httpString + "log.bin") {
var request = URLRequest(url: url)
request.httpMethod = "GET"
let task = session.dataTask(with: request)
task.resume()
}
}
func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
if dataTask.countOfBytesReceived >= 500 {
print(dataTask.countOfBytesReceived)
}
}
}