Understand how the HTTP protocol works.Modern web services often, but not always, are based on the REST architecture. And, if you work for a company or a client, you might have to interface with a private one.
Each one comes with its implementation and documentation. Nowadays, there are many public APIs on the internet.
In this article, we will look at each aspect, one by one. There are many moving parts you need to understand when connecting to a remote web service in iOS.
Performing network requests in an iOS app does not merely amount to adding some extra code. The required steps to perform network requests to a REST API from an iOS app Since network requests to REST APIs go through the internet, they rely on protocols and standards you need to understand if your app relies on the internet to retrieve its data. Network requests in iOS apps don’t happen in a vacuum.
#IOS SWIFT SHARE BUTTON CODE#
Even if you use the iOS SDK correctly if you structure your code in the wrong way you end with all sorts of problems in your app. The server then rejected the extra network calls, causing the multiple alerts to appear in the app.Īrchitecture is a topic I often cover in my articles because this is the vital foundation of every iOS app. Since there were many listeners for the same notification, network calls for the same item were duplicated. Network calls and callbacks were handled through notifications, which I usually recommend to avoid. The alert would not only show once but multiple times.Īfter a more in-depth investigation, I discovered that the problem was caused by the networking stack of the app, which had the wrong architecture. Since that was a new item, it clearly was not possible. But sometimes, when adding a new item, the app would reply with an alert saying that the object already existed on the server. The app displayed a list of items, and the user could add more. I once worked on a project where strange bugs happened randomly. Many developers simply put together pieces of networking code they find on Stack Overflow, o use a networking library.īut networking has a lot of hidden pitfalls. It’s easy to say: “I need to get some data from a REST API.” But such sentence hides a ton of complexity. Moreover, many parts of your app’s architecture need to interact, making the task more complicated than it might seem at first. When making asynchronous network calls, you need to combine several features of Swift, SwiftUI, and the Foundation framework. Writing the networking layer of an iOS app, though, is not a simple task. And often, such a web service is a REST API that returns data in JSON format. Networked apps usually interface with a remote web service that provides data. This class UIActivityViewController can handle sharing text URLs image and more and is also able to add our app's own However the default share sheet for images will offer users the chance to This will let us create this activity item from elsewhere more easily and its main Average rating: 4.4/5.Networking is a requirement for most modern iOS apps. If you wanted to use your view controller first make it conform to UIActivityItemSource like this: This class UIActivityViewController can handle sharing text URLs Sharing basic content However the default share sheet for images will offer users the chance to save the image to their photo library.
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