init(request:delegate:)
Returns an initialized URL connection and begins to load the data for the URL request.
Declaration
init?(request: URLRequest, delegate: Any?)Parameters
- request:
The URL request to load. The
requestobject is deep-copied as part of the initialization process. Changes made torequestafter this method returns do not affect the request that is used for the loading process. - delegate:
The delegate object for the connection. The connection calls methods on this delegate as the load progresses. Delegate methods are called on the same thread that called this method. By default, for the connection to work correctly, the calling thread’s run loop must be operating in the default run loop mode. See Schedule(in:formode:) to change the run loop and mode.
Return Value
The URL connection for the URL request. Returns nil if a connection can’t be initialized.
Discussion
This is equivalent to calling init(request:delegate:startImmediately:) and passing true for startImmediately.
Special Considerations
During the download the connection maintains a strong reference to the delegate. It releases that strong reference when the connection finishes loading, fails, or is canceled.