Protocol

URLSessionDataDelegate

The NSURLSessionDataDelegate protocol defines the methods that a delegate of an URLSession object can implement to handle task-level events specific to data tasks and upload tasks.

Overview

Your session delegate should also implement the methods in the URLSessionTaskDelegate protocol to handle task-level events that are common to all task types, and methods in the URLSessionDelegate protocol to handle session-level events.

Topics

Delegate Methods

func urlSession(URLSession, dataTask: URLSessionDataTask, didBecome: URLSessionDownloadTask)

Tells the delegate that the data task was changed to a download task.

func urlSession(URLSession, dataTask: URLSessionDataTask, didBecome: URLSessionStreamTask)

Tells the delegate that the data task was changed to a streamtask.

func urlSession(URLSession, dataTask: URLSessionDataTask, didReceive: Data)

Tells the delegate that the data task has received some of the expected data.

Constants

enum URLSession.ResponseDisposition

Constants indicating how a data or upload session should proceed after receiving the initial headers.

Relationships

See Also

Adding Data Tasks to a Session

func dataTask(with: URL)

Creates a task that retrieves the contents of the specified URL.

func dataTask(with: URL, completionHandler: (Data?, URLResponse?, Error?) -> Void)

Creates a task that retrieves the contents of the specified URL, then calls a handler upon completion.

func dataTask(with: URLRequest)

Creates a task that retrieves the contents of a URL based on the specified URL request object.

func dataTask(with: URLRequest, completionHandler: (Data?, URLResponse?, Error?) -> Void)

Creates a task that retrieves the contents of a URL based on the specified URL request object, and calls a handler upon completion.

class URLSessionDataTask

A URL session task that returns downloaded data directly to the app in memory.