NSURLSession: How to increase time out for URL requests?

I am using iOS 7's new NSURLSessionDataTask to retrieve data as follows:

NSURLSession *session = [NSURLSession sharedSession];

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

How can I increase the time out values to avoid the error "The request timed out" (in NSURLErrorDomain Code=-1001)?

I have checked the documentation for NSURLSessionConfiguration but did not find a way to set the time out value.

Thank you for your help!

###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)

###What docs say

timeoutIntervalForRequest and timeoutIntervalForResource specify the timeout interval for the request as well as the resource.

> 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.

Based on NSURLSessionConfiguration Class Reference

In case Swift developer coming here

to do this, you need to use

    let urlconfig = NSURLSessionConfiguration.defaultSessionConfiguration()
    urlconfig.timeoutIntervalForRequest = 12
    urlconfig.timeoutIntervalForResource = 12
    self.session = NSURLSession(configuration: urlconfig, delegate: self.delegates, delegateQueue: nil)

In swift 3. timeout 15 seconds.

    let configuration = URLSessionConfiguration.default
    configuration.timeoutIntervalForRequest = TimeInterval(15)
    configuration.timeoutIntervalForResource = TimeInterval(15)
    let session = URLSession(configuration: configuration)

In my case I was increasing the timeout of the wrong class. My timeout error was solved by increasing the timeout of the URLRequest not the URLSession

var request = URLRequest(url: url)
request.timeoutInterval = 30

NSURLSessionConfiguration includes the property timeoutIntervalForRequest:

@property NSTimeInterval timeoutIntervalForRequest

to control the timeout interval. There is also timeoutIntervalForResource for the timeout after the request is initiated.

In SWIFT 3.0, You need to use

 if let cleanURLString = urlString.addingPercentEncoding(withAllowedCharacters: CharacterSet.urlQueryAllowed),
    let theURL: Foundation.URL = Foundation.URL(string: cleanURLString) {

    var task:URLSessionDataTask?
    let urlconfig = URLSessionConfiguration.default
    urlconfig.timeoutIntervalForRequest = 20
    urlconfig.timeoutIntervalForResource = 60
    let session = Foundation.URLSession(configuration: urlconfig, delegate: self, delegateQueue: OperationQueue.main)

    let request = URLRequest(url: theURL)
    request.httpMethod = "POST"
    request.cachePolicy = URLRequest.CachePolicy.reloadIgnoringCacheData
    request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
    let paramString = YourParameterString
    request.httpBody = paramString.data(using: String.Encoding.utf8)

    task = session.dataTask(with: request) {
        (data, response, error) in
        // Do here
    })
    dataTask.resume()
}

For Swift 4:

let config = URLSessionConfiguration.default
config.timeoutIntervalForRequest = TimeInterval(15)
config.timeoutIntervalForResource = TimeInterval(15)
let urlSession = URLSession(configuration: config)

The timeoutIntervalForRequest is for all tasks within sessions based on this configuration. The timeoutIntervalForResource is for all tasks within sessions based on this configuration.