https://clive819.github.io/Blog from Clive Liu, focusing on iOS development. 2026-03-12T22:40:54-04:00 Clive Liu https://clive819.github.io/ Jekyll © 2026 Clive Liu /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png 2026-03-12T00:00:00-04:00 2026-03-12T00:00:00-04:00 https://clive819.github.io/posts/swiftui-gotcha-state-wrapped-value-inside-init/ Clive Liu

You’ve probably heard the rule: SwiftUI only uses @State’s initial value once. After that, it ignores whatever you pass in subsequent init() calls. But what exactly happens to _state.wrappedValue inside init() when the view is re-initialized? Does it return the live SwiftUI-managed state, or the freshly-constructed default? This distinction matters — especially when you’re storing @Observable ...

2026-01-02T00:00:00-05:00 2026-01-02T00:00:00-05:00 https://clive819.github.io/posts/swiftui-custom-navigation-back-button/ Clive Liu

SwiftUI’s default NavigationStack and NavigationView provide a system back button, but customizing its appearance requires replacing it entirely. Unlike UIKit’s navigationItem.leftBarButtonItem, there’s no direct API to style the default back button. This guide shows how to implement a custom back button with full control over appearance and behavior while preserving the native swipe-to-dismiss...

2025-11-27T00:00:00-05:00 2025-11-27T00:00:00-05:00 https://clive819.github.io/posts/lost-hours-integrating-swiftdata/ Clive Liu

Debug vs. Release: When Code Only Crashes in Release extension ModelContext { func fetch<Model: PersistentModel & Identifiable<UUID>>(id: UUID) throws -> Model? { let predicate = #Predicate<Model> { model in model.id == id } return try self.fetch(FetchDescriptor(predicate: predicate)).first } } This helper runs perfectly in...

2025-11-27T00:00:00-05:00 2025-11-27T00:00:00-05:00 https://clive819.github.io/posts/lost-hours-integrating-firebase-realtime-database/ Clive Liu

Integrating Firebase Realtime Database with Swift’s Codable protocol should be straightforward, but a few non-obvious behaviors can lead to hours of frustrating debugging. Here are three key pitfalls to watch out for. Dictionary Keys Must Be Strings FirebaseDataEncoder.swift#L1290 Firebase Realtime Database requires that all dictionary keys be String types. If you attempt to encode a mod...

2025-09-05T00:00:00-04:00 2025-09-05T01:13:36-04:00 https://clive819.github.io/posts/hiding-swiftui-view/ Clive Liu

When building user interfaces, it’s common to show or hide views based on state. In SwiftUI, there are several options: A simple if-else statement The .hidden() modifier The .opacity(_:) modifier if-else if condition { MyView() } if condition { MyView() } else { MyOtherView() } Notes: The view’s structural identity changes when the condition toggles, which resets an...