When working with asynchronous code, we often turn to concurrency to take advantage of multiple threads’ processing capabilities. This can lead to race conditions, which occur when two or more threads attempt to access/modify values simultaneously. We can avoid these problems by creating objects of type actor. An actor is…

For cases where the number of concurrent processes is determined at runtime, we can use TaskGroup. These contain groups of asynchronous tasks that are created dynamically. To create a TaskGroup, we use withThrowingTaskGroup(of:returning:body:): await withThrowingTaskGroup(of: String.self, returning: [String]) { group in ... } With this code, we create a TaskGroup…

MainActor is a singleton that runs code on the main thread. In more detailed terms, it is an actor whose executor runs code on the main thread, also known as the main thread or UI thread. There are many use to MainActor By calling the run method and passing our…

Previously, when we needed to handle concurrent processes without returning anything, we had to use TaskGroup and specify a type like Void.self. Let's see an example: func execute() async { await withTaskGroup(of: Void.self) { group in for _ in list { group.addTask { await fetch() } } ... } } …

You can define rules to control when a tip should be displayed. TipKit offers two ways to do this: based on Parameters and on Events. If you still don’t know what TipKit is and want to learn how to use it, I recommend this article on our blog before continuing. SwiftUI Example App …

At WWDC 2023, Apple introduced a new view in SwiftUI called ContentUnavailableView. This view allows us to create empty states. Let's see an example of how to create this view: ContentUnavailableView { // 1 Label("Title", systemImage: "image") // 2 } description: { Text("Description") // 3 } actions: {…

WWDC 2023 brought many surprises, one of them being the introduction of TipKit, a framework that allows displaying suggestions or tips to users of an app. Some use cases may include making existing but lesser-known features more visible or showcasing new features introduced in an app update. TipKit is available…

Version 4.3.0 of Lottie comes with official support for SwiftUI. We no longer need to create a UIViewRepresentable, but we can directly use its new view LottieView. To try out this new view, follow these steps: Install Lottie with Swift Package Manager. Download an animation. Use the animation. Install Lottie with Swift Package Manager In Xcode…

A Continuation is a mechanism that allows us to bridge synchronous and asynchronous code. func withCheckedContinuation<T>( function: String = #function, _ body: (CheckedContinuation<T, Never>) -> Void ) async -> T This is the signature of withCheckedContinuation(function:_:). Let's look at the parameters it requires: function is used to identify the function…