What is REST API in iOS Swift?

REST APIs or RESTful web services in layman’s terms are the way that the mobile apps or websites communicate and transmit data to servers and vice-versa. There are a set HTTP Requests posting and getting data to and from servers over internet.

What is RESTful API iOS?

REST APIs use URLs and the HTTP protocol to identify resources and transfer data. You access any REST API through the internet. That means that the various resources offered by the API are identified by a set of uniform resource locators or URLs.

How does Swift handle multiple API calls?

Concurrent API Calls in Swift

1. Create a DispatchGroup. Use a DispatchGroup to keep track of multiple asynchronous tasks.
2. Make HTTP Requests In Parallel. When a new task starts, call group.
3. Configure A Completion Callback. When all tasks complete the DispatchGroup trigger a callback.
4. Multiple, Asynchronous HTTP Requests.

What options do you have for implementing networking and HTTP on iOS?

In iOS there are several options to implement HTTP networking. You can go with good old NSURLSession, but unless you abstract it out well enough, it can be daunting to work with. Another option would be to use a wrapper library around it. The most popular solution on iOS is Alamofire/AFNetworking.

Which third party API is used for networking in iOS?

Rest API. NSURLSession: Networking without third party libraries. Alamofire: Networking with a third party library to simplify the process.

How many types of Swift API are there?

There isn’t just one type of API (Application Programming Interface) but actually, there are four main types of APIs: Open APIs, aka Public APIs, are publicly available to developers and other users with minimal restriction. They may require registration, use of an API Key or OAuth, or maybe completely open.

How do I call multiple API calls?

If you want to call multiple API calls simultaneously, there’s a better approach using Promise. all() . But if one API calls requires data from another, returning the fetch() method like this provides a simple, readable, flat structure and let’s you use a single catch() for all of your API calls.

How do I make a concurrent API call?

Handling Concurrent Requests in a RESTful API

1. User A requests resource 1 via a GET endpoint.
2. User B requests resource 1 via a GET endpoint.
3. User A makes changes on resource 1 and saves its changes via a PUT request.
4. User B makes changes on resource 1, on the same fields as user A, and saves its changes via a PUT request.

What options do you have for implementing storage and persistence on iOS?

Following are the data storage options in IOS.

• UserDefaults. UserDefaults are a great way to save a small amount of data.It’s not intended to save a lot of user generated data though.
• Property List. Property lists are another great way to store our data.
• SQLite.
• Keychain.
• Saving Files.
• CoreData.

What is iOS architecture?

Architecture of IOS is a layered architecture. At the uppermost level iOS works as an intermediary between the underlying hardware and the apps you make. Apps do not communicate to the underlying hardware directly. Apps talk with the hardware through a collection of well defined system interfaces.

Which iOS framework is commonly used third party library?

AFNetworking
AFNetworking An amazing community of developers contributes to AFNetworking daily, making it the most popular third-party iOS library.

What are the best practices for preparing a REST API?

Here are the 9 best practices you should consider when preparing the REST API. 1. Use JSON It may seem too obvious, but REST allows using different output formats, like plain text, JSON, CSV, XML, RSS, or even HTML. For sure this may depend on the application you have and specifically on what you need your API for.

What are the prerequisites for learning Swift REST API?

Prerequisites: You should be familiar with the basic of the Swift programming language. For the use of 3-rd party libraries familiarity with use Cocoapods in Xcode is useful. What is REST? REST (Representational State Transfer) is an architectural style for designing distributed systems.

What are the HTTP methods used by RESTful Web API?

The common HTTP methods used by most RESTful web APIs are: GET retrieves a representation of the resource at the specified URI. The body of the response message contains the details of the requested resource. POST creates a new resource at the specified URI.

What is the best way to design APIs?

There is a long debate going on the internet, about the best ways to design the APIs, and is one of the most nuanced. There are no official guidelines defined for the same. The API is an interface, through which many developers interact with the data. A good designed API is always very easy to use and makes the developer’s life very smooth.