Protocol

URLSessionDownloadDelegate

The NSURLSessionDownloadDelegate protocol defines delegate methods that you should implement when using URLSession download tasks.

Overview

In addition to the methods in this protocol, be sure to implement the methods in the URLSessionTaskDelegate and URLSessionDelegate protocols to handle events common to all task types and session-level events, respectively.

Relationships

See Also

Adding Download Tasks to a Session

func downloadTask(with: URL)

Creates a download task that retrieves the contents of the specified URL and saves the results to a file.

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

Creates a download task that retrieves the contents of the specified URL, saves the results to a file, and calls a handler upon completion.

func downloadTask(with: URLRequest)

Creates a download task that retrieves the contents of a URL based on the specified URL request object and saves the results to a file.

func downloadTask(with: URLRequest, completionHandler: (URL?, URLResponse?, Error?) -> Void)

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

func downloadTask(withResumeData: Data)

Creates a download task to resume a previously canceled or failed download.

func downloadTask(withResumeData: Data, completionHandler: (URL?, URLResponse?, Error?) -> Void)

Creates a download task to resume a previously canceled or failed download and calls a handler upon completion.

class URLSessionDownloadTask

A URL session task that stores downloaded data to file.