我要从 API 读取文件，但它的大小等于 1.6mb，而且需要很长时间。我希望分部分阅读它，当我找到我需要的数据时，我将停止接收数据。我尝试使用一些委托(delegate)方法，但它们不起作用。我不明白哪里出了问题？
我有下一个代码:
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)
}
}
}
最佳答案
根据评论，我编辑了代码并且成功了。
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)
}
}
}
关于ios - URLSession 委托(delegate)方法不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49403166/