Know how to safely run concurrent Swift code — When the first time I saw the WWDC presentation about actors, I was thrilled with what it is capable of and how it will change the way we write asynchronous code in the near future. …

Writing an image to the camera roll is fairly simple in iOS development, but when it comes to detecting when the image has been written to the camera roll, it is not as simple as we think. …

Gives your users a seamless transition experience between web views and native views — When working on a hybrid mobile app, it is extremely important to ensure that our users have a seamless transition experience between web views and native views. One very common technique we can use to provide this kind of experience is by hijacking the WKWebView navigation actions. In this article…

A lesser-known yet super powerful feature of WKWebView — Using a web view to display some frequently updated content such as FAQ is a very common tactic used by most iOS developers. By doing so, developers can easily update the web view content without going through the App Store review process. On the other hand, users will be able…

Error handling in task groups — If you have read my previous article, you should know by now how to create a task group, add child tasks to a task group, and gather results from all the child tasks. However, there is one important topic related to task groups that I have not covered, which is…

Create child tasks and gather results effectively in your iOS modules — Apple introduced task groups in Swift 5.5 as one of the essential parts in the Swift concurrency framework. As the name implies, a task group is a collection of child tasks that run concurrently, and it only returns when all of its child tasks finish executing. In this article, I…

A quick look at the Sendable protocol — In my previous article, you learned that actors can help us prevent data races by ensuring mutual exclusion to its mutable states. This statement is true as long as we are accessing the mutable states within the actors. …

Say goodbye to data races — Data races — the worst nightmare of all developers! They are hard to detect, very unpredictable, and extremely difficult to fix. Apple has given developers various toolsets such as NSLock and serial queues to prevent data races from happening during runtime, however, none of them are capable of catching race…

Power up your iOS apps with Swift concurrency — Traditionally, when we want to make a network request, we must use the closure-based URLSession APIs to perform the request asynchronously so that our apps can be responsive while waiting for it to complete. With the release of Swift 5.5, …