URLSession dataTask长延迟
URLSession dataTask长延迟
提问于 2021-04-09 07:03:29
当我从代码中请求API时，我在4-6秒后得到响应，这太长了。从邮递员那里我得到120毫秒后的回复。我的代码出了什么问题吗？这是我的代码，我正在检查这两张照片之间的时间：
func makeUrlRequest<T: Codable>(_ request: URLRequest, resultHandler: @escaping (Result<T, RequestError>) -> Void) {
var req = request
req.addValue("application/json", forHTTPHeaderField: "Content-Type")
req.addValue("application/json", forHTTPHeaderField: "Accept")
let config = URLSessionConfiguration.default
let urlSession = URLSession(configuration: config, delegate: self, delegateQueue: .main)
print("Request: start at: \(Date())") //Request: start at: 2021-04-09 06:53:32 +0000
let urlTask = urlSession.dataTask(with: req) { data, response, error in
print("Request: finished at: \(Date())") //Request: finished at: 2021-04-09 06:53:36 +0000
DispatchQueue.main.async {
guard error == nil else {
resultHandler(.failure(.clientError))
return
}
guard let response = response as? HTTPURLResponse, 200...299 ~= response.statusCode else {
resultHandler(.failure(.serverError))
return
}
guard let data = data else {
resultHandler(.failure(.noData))
return
}
guard let decodedData: T = self.decodedData(data) else {
resultHandler(.failure(.dataDecodingError))
return
}
resultHandler(.success(decodedData))
}
}
urlTask.resume()
}回答 1
Stack Overflow用户
回答已采纳
发布于 2021-04-09 07:32:46
而不是
let urlSession = URLSession(configuration: config, delegate: self, delegateQueue: .main)
print("Request: start at: \(Date())") //Request: start at: 2021-04-09 06:53:32 +0000
let urlTask = urlSession.dataTask(with: req) { data, response, error in...你应该用
let task = URLSession.shared.dataTask(with: req) { (data, response, error) in...编辑：
我看到你想用一位代表。在这种情况下，不应该使用完成处理程序，而应该添加委托方法：
func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data)func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?)欲了解更多信息，请访问苹果的文档。
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原文链接：
https://stackoverflow.com/questions/67016504
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