What is NSURLSession in Swift?

What is NSURLSession in Swift?

Overview. The NSURLSession 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.

How do I use URLSession in Swift 4?

1. Set up the HTTP request with URLSession.
2. Make the request with URLSessionDataTask.
3. Print the returned response data.
4. Properly validate the response data.
5. Convert the response data to JSON.
6. Set up the HTTP POST request with URLSession.
7. Set up the request headers and body.
8. Make the request with URLSessionUploadTask.

What is Nsurl session?

NSURLSession introduces a new pattern to Foundation delegate methods with its use of completionHandler: parameters. This allows delegate methods to safely be run on the main thread without blocking; a delegate can simply dispatch_async to the background, and call the completionHandler when finished.

What is REST API in Swift?

Network Requests and REST APIs in iOS with Swift (Protocol-Oriented Approach) 81 Comments. Networking is a requirement for most modern iOS apps. Networked apps usually interface with a remote web service that provides data. And often, such a web service is a REST API that returns data in JSON format.

Where can I learn Swift programming language?

Recommended Learning

• Developing iOS 11 Apps with Swift (itunes.apple.com)
• Ray Wenderlich Tutorials (www.raywenderlich.com)
• iOS 11 & Swift 4 – The Complete iOS App Development Bootcamp (www.udemy.com)

What is REST API in iOS Swift?

Network Requests and REST APIs in iOS with Swift (Protocol-Oriented Approach) 51 Replies. Networking is a requirement for most modern iOS apps. Networked apps usually interface with a remote web service that provides data. And often, such a web service is a REST API that returns data in JSON format.

Is ambiguous without more context Swift?

“expression is ambiguous without more context” error means that the compiler is unable to understand what you’re trying to express because you aren’t being specific enough. In order to solve it, you have put correct arguments.