What is NSURLRequest?
A representation of a URL load request that you use when you need reference semantics or other Foundation-specific behavior.
What is NSMutableURLRequest?
NSMutableURLRequest is a subclass of NSURLRequest that allows you to change the request’s properties. NSMutableURLRequest only represents information about the request. Use other classes, such as URLSession , to send the request to a server.
What is NSURLConnection class?
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.
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 NSData?
A static byte buffer that bridges to Data ; use NSData when you need reference semantics or other Foundation-specific behavior.
What is URL request in Swift?
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 NSURLSession asynchronous?
Like most networking APIs, the NSURLSession API is highly asynchronous. It returns data to your app in one of three ways, depending on the methods you call: If you’re using Swift, you can use the methods marked with the async keyword to perform common tasks.
What is URL session?
A URL session task that uploads data to the network in a request body. protocol URLSessionDataDelegate. A protocol that defines methods that URL session instances call on their delegates to handle task-level events specific to data and upload tasks.
What does NS mean in Swift?
NeXTSTEP
The Foundation Kit, or just Foundation for short, is an Objective-C framework in the OpenStep specification. It provides basic classes such as wrapper classes and data structure classes. This framework uses the prefix NS (for NeXTSTEP). It is also part of Cocoa and of the Swift standard library.
What is data () in Swift?
Data in Swift 3 is a struct that conforms to collection protocol. It is a collection of bytes ( [UInt8] array of unsigned integer 8 bits 0-255). – Leo Dabus Apr 7 ’17 at 2:22. 3. It’s a class representing a collection of bytes.
What is URLSession in iOS?
Overview. 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 URLSession in iOS 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.
What does nsurlrequest stand for in HTTP protocol?
In addition, for HTTP and HTTPS requests, URLRequest includes the HTTP method ( GET, POST, and so on) and the HTTP headers. Finally, custom protocols can support custom properties as explained in Custom Protocol Properties. NSURLRequest only represents information about the request.
When to use nsmutableurlrequest in a load request?
A mutable URL load request that bridges to NSURLRequest and you use when you need reference semantics or other Foundation-specific behavior. NSMutableURLRequest is a subclass of NSURLRequest that allows you to change the request’s properties. NSMutableURLRequest only represents information about the request.
What are the two properties of nsurlrequest?
NSURLRequest 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. Finally, custom protocols can support custom properties as explained in Custom Protocol Properties.
When to use nsurlconnection in iOS 5?
In iOS 5, NSURLConnection added the method sendAsynchronousRequest:queue:completionHandler:, which greatly simplified its use for one-off requests, and offered an asynchronous alternative to -sendSynchronousRequest:returningResponse:error::