In the toolbox of SwiftUI, overlay and background are two extremely useful view modifiers that play an indispensable role in various development scenarios. This article will delve into the unique attributes of these two modifiers, clarify their fundamental differences from ZStack, and identify the scenarios they are best suited for.

SwiftData, as the successor to Core Data, has introduced a multitude of innovative and modern design ideas. Despite its availability for some time now, many developers have yet to adopt it in their projects. This situation is partly due to SwiftData's higher requirements for the operating system version. Additionally, because SwiftData is not yet mature enough in some functionalities, developers might choose to continue using Core Data even if their operating system version meets SwiftData’s requirements. Can we integrate some of SwiftData's excellent design philosophies and ingenious implementations into the practical use of Core Data? This article aims to explore how to introduce elegant and safe concurrency operations similar to those of SwiftData into Core Data, implementing a Core Data version of @ModelActor.

In this article, we will delve into a bug affecting SwiftUI applications in multi-window mode and propose effective temporary solutions. We will not only detail the manifestation of this issue but also share the entire process from discovery to diagnosis, and finally, resolution. Through this exploration, our aim is to offer guidance to developers facing similar challenges, helping them better navigate the complexities of SwiftUI development.

This content was presented at Let's VisionOS 2024. For easier reading, I have simplified the original material and adjusted it for a more formal written expression. The core message of this share is to convey the following central idea: Although these new frameworks were designed to address issues in existing frameworks, we should not be constrained by past experiences and conventions. It is necessary to learn and use these new tools with an open mind and a fresh perspective. Adopting new frameworks should be seen as an excellent opportunity to refactor projects towards greater safety and modernization.

An increasing number of developers are starting to enable strict concurrency checks in preparation for the arrival of Swift 6. Among the warnings and errors received, a portion relates to SwiftUI views, many of which stem from developers not correctly understanding or using @MainActor. This article will discuss the meaning of @MainActor, as well as tips and considerations for applying @MainActor within SwiftUI views.