What is NSURLConnection in Swift?

What is NSURLConnection in Swift?

An NSURLConnection object lets you load the contents of a URL by providing a URL request object. The NSURLConnection class provides convenience class methods to load URL requests both asynchronously using a callback block and synchronously.

How do I use NSURLConnectionDelegate?

To fetch some data, we’ll follow these 3 basic steps:

1. Have our class conform to the NSURLConnectionDelegate protocol and declare a var to store the response data.
2. Implement the NSURLConnectionDelegate protocol methods.
3. Create an instance of NSURLRequest and NSURLConnection to kick off the request.

What is the difference between NSURLSession and NSURLConnection?

NSURLSession also provides nicer interfaces for requesting data using blocks, in that it allows you to combine them with delegate methods for doing custom authentication handling, redirect handling, etc., whereas with NSURLConnection, if you suddenly realized you needed to do those things, you had to refactor your code …

What is URL session in Swift?

The URLSession is used to create URLSessionTask instances, which can fetch and return data to your app, and download and upload files to webservices. You configure a session with a URLSessionConfiguration object. This configuration manages caching, cookies, connectivity and credentials.

How do I call a webservice in Swift?

How To Call Webservice in Swift – NSURLConnection?

1. 12 var request: NSURLRequest = NSURLRequest(URL: url) var connection: NSURLConnection = NSURLConnection(request: request, delegate: self, startImmediately: false)
2. 1234 func connection(didReceiveResponse: NSURLConnection!,
3. didReceiveData :

What is Alamofire?

Alamofire is an elegant and composable way to interface to HTTP network requests. It builds on top of Apple’s URL Loading System provided by the Foundation framework. At the core of the system is URLSession and the URLSessionTask subclasses.

What is URL session?

The URLSession class and related classes provide an API for downloading data from and uploading data to endpoints indicated by URLs. Your app can also use this API to perform background downloads when your app isn’t running or, in iOS, while your app is suspended.

What is URLRequest?

URLRequest encapsulates two essential properties of a load request: the URL to load and the policies used to load it. In addition, for HTTP and HTTPS requests, URLRequest includes the HTTP method ( GET , POST , and so on) and the HTTP headers. URLRequest only represents information about the request.

Is URLSession a singleton?

URLSession is already a singleton, and it is the object that makes the network calls. This can be abstracted away from the main class, so either URLSession can be injected into the network manager or used as a mock class.

How do I make an API call?

Wait for the response.

1. Find the URI of the external server or program. To make an API call, the first thing you need to know is the Uniform Resource Identifier (URI) of the server or external program whose data you want.
2. Add an HTTP verb.
3. Include a header.
4. Include an API key or access token.
5. Wait for a response.

What is API in Swift?

API stands for Application Programming Interface. It is a programmatic way to be able to access functions and data of other apps.

Does Alamofire use URLSession?

Alamofire and URLSession both help you to make network requests in Swift. The URLSession API is part of the foundation framework, whereas Alamofire needs to be added as an external dependency.

What does nsurlconnection do for an URL request?

An NSURLConnection object lets you load the contents of a URL by providing a URL request object. The interface for NSURLConnection is sparse, providing only the controls to start and cancel asynchronous loads of a URL request. You perform most of your configuration on the URL request object itself.

How does the nsurlconnection class work in Java?

The NSURLConnection class provides convenience class methods to load URL requests both asynchronously using a callback block and synchronously. For greater control, you can create a URL connection object with a delegate object that conforms to the NSURLConnectionDelegate and NSURLConnectionDataDelegate protocols.

How to set a cache policy in nsurlconnection?

To specify how your data should be cached locally, you can set a cache policy with your NSURLRequest. For example, the following snippet shows you how you can define a cache policy and a timeout. // Initialize a request with an url cache policy and timeout.

What does the delegate method do in nsurlconnection?

The connection calls methods on that delegate to provide you with progress and status as the URL request is loaded asynchronously. The connection also calls delegate methods to let you override the connection’s default behavior (for example, specifying how a particular redirect should be handled).