ios - NSURLSession:如何增加 URL 请求的超时时间？

Question

我正在使用 iOS 7 的新 NSURLSessionDataTask 来检索数据，如下所示:

NSURLSession *session = [NSURLSession sharedSession];

NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:
request completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error) {
//
}];

如何增加超时值以避免错误“请求超时”(在NSURLErrorDomain Code=-1001中) ?

我查看了 NSURLSessionConfiguration 的文档但没有找到设置超时值的方法。

感谢您的帮助!

Answer 1

ObjC

NSURLSessionConfiguration *sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration];
sessionConfig.timeoutIntervalForRequest = 30.0;
sessionConfig.timeoutIntervalForResource = 60.0;

swift

let sessionConfig = URLSessionConfiguration.default
sessionConfig.timeoutIntervalForRequest = 30.0
sessionConfig.timeoutIntervalForResource = 60.0
let session = URLSession(configuration: sessionConfig)

文档怎么说

timeoutIntervalForRequest 和 timeoutIntervalForResource 指定请求和资源的超时间隔。

timeoutIntervalForRequest - The timeout interval to use when waiting for additional data. The timer associated with this value is reset whenever new data arrives. When the request timer reaches the specified interval without receiving any new data, it triggers a timeout.

timeoutIntervalForResource - The maximum amount of time that a resource request should be allowed to take. This value controls how long to wait for an entire resource to transfer before giving up. The resource timer starts when the request is initiated and counts until either the request completes or this timeout interval is reached, whichever comes first.

基于 NSURLSessionConfiguration Class Reference