Question

请注意，我已经尝试了很多解决方案，例如this，但没有一个解决方案。

这里是screenshot和代码;

func downloadItems() {

    let urlE: String = "http://alicelik.me/forios/service.php"
    guard let url = URL(string: urlE) else {
        print("Error: cannot")
        return
    }

    let configuration = URLSessionConfiguration.default
    var session = URLSession(configuration: configuration)

    let task = session.dataTask(with: url as URL){
        (data, response, error) in
        guard error == nil else {
            print("error calling GET on /todos/1")
            print(error)
        }
        return()
    }

    task.resume()

}

这是URLSession func;

@nonobjc func URLSession(session: URLSessionConfiguration, dataTask: URLSessionDataTask, didReceiveData data: NSData) {
    self.data.append(data as Data);

}

@nonobjc func URLSession(session: URLSessionConfiguration, task: URLSessionTask, didCompleteWithError error: NSError?) {
    if error != nil {
        print("Failed to download data")
    }else {
        print("Data downloaded")
        self.parseJSON()
    }

}

注意：* func URLSession（session *）中的URLSession和* URLSessionConfiguration给出相同的错误。

Answer 1

我有同样的问题，通过以下方式解决：

var session = Foundation.URLSession(configuration: configuration)

Answer 2

更改URLSession func将解决问题。

func downloadItems() {
    let url: NSURL = NSURL(string: urlPath)!
    var session = URLSession()
    let configuration = URLSessionConfiguration.default
    session = URLSession(configuration: configuration, delegate: self, delegateQueue: nil)
    let task = session.dataTask(with: url as URL)
    task.resume()
}

func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
    self.data.append(data as Data)
}

func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
    if error != nil {
        print("Failed to download data")
    } else {
        print("Data downloaded")
        self.parseJSON()
    }
}

无法调用＆＃39; URLSession＆＃39;使用类型＆＃39;（配置：URLSessionConfiguration）＆＃39;的参数列表

2 个答案: