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SwiftUI View implementation guide with ObservableObject in macOS 13.6

πŸ‘€ Views: 6273 πŸ’¬ Answers: 1 πŸ“… Created: 2025-06-24
swift swiftui observableobject Swift

I keep running into Quick question that's been bugging me - I'm experiencing an scenario where my SwiftUI view isn't updating as expected when the properties of an `ObservableObject` change... I have a simple model class that conforms to `ObservableObject`, and I'm using `@Published` properties. However, changes to these properties do not trigger a view update, and I'm exploring trying to figure out why. Here’s the relevant part of my code: ```swift import SwiftUI import Combine class UserData: ObservableObject { @Published var name: String = "" @Published var age: Int = 0 } struct ContentView: View { @ObservedObject var userData = UserData() var body: some View { VStack { Text("Name: \(userData.name)") Text("Age: \(userData.age)") Button("Update User") { self.userData.name = "John Doe" self.userData.age = 30 } } } } ``` The `ContentView` initializes an instance of `UserData`, and I have added a button that updates the `name` and `age` properties. However, when I click the button, the text displaying the name and age does not update in the UI. I’ve tried adding print statements in the button action to ensure it’s being called, and I can see the values being set correctly, but the view does not reflect these changes. I've also confirmed that `UserData` is correctly marked as `ObservableObject`, and my properties are `@Published`. I even made sure that `ContentView` is being re-initialized, but it seems that the question continues. Is there something I'm missing regarding the lifecycle of `ObservableObject` in SwiftUI, or is there a common pitfall that could cause the view not to update? Any help would be greatly appreciated! The stack includes Swift and several other technologies.