開發者週報 #177 表妹

Apple/iOS 開發者的一週大小事 2023/03/01-2023/03/05

Mar 05, 2023

上一期延後到連假結束才出刊，所以這週的內容就少了 2 天的份量。重點就是要把 Beta 2 Release Notes 掃過一遍囉。
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🧪Apple Releases

果不其然上一期週報（週二發刊）截稿的半夜 Beta 2 推出了。

📊Peer group benchmarks now available in App Analytics

App Store 官方的行銷工具花樣更多了。

📜StateObject

Apple 近期更新了 SwiftUI 中 StateObject 的文件。

Luca Bernardi @luka_bernardi

You'll find a better explanation around how to initialize a StateObject with external data with few words around what to pay attention when doing so (developer.apple.com/documentation/…)

developer.apple.comStateObject | Apple Developer DocumentationA property wrapper type that instantiates an observable object.

拿來跟舊版稍微比較了一下，清楚不少。

比如第一段裡，新版增加的部分我標了粗體。

Use a state object as the single source of truth for a reference type that you store in a view hierarchy. Create a state object in an App, Scene, or View by applying the @StateObject attribute to a property declaration and providing an initial value that conforms to the ObservableObject protocol. Declare state objects as private to prevent setting them from a memberwise initializer, which can conflict with the storage management that SwiftUI provides.