How to fix “Referencing initializer 'init(wrappedValue:)' on 'ObservedObject' requires that ‘SomeType’ conform to 'ObservableObject'"

Paul Hudson    @twostraws    October 14th 2019

Fully updated for Xcode 11.4

This error happens because you’re trying to use the @ObservedObject property wrapper on a type that doesn’t conform to the ObservableObject protocol.

For example, you have a type like this:

class User {
    @Published var name = ""
}

And you use it in a view like this:

struct ContentView: View {
    @ObservedObject var user = User()

    var body: some View {
        Text(user.name)
    }
}

To fix the problem, simply add the ObservableObject conformance to your type, like this:

class User: ObservableObject {
    @Published var name = ""
}

SPONSORED Building in-app subscriptions are hard. RevenueCat makes it simple. With their open source SDKs, you can painlessly implement subscriptions for your app in hours, not months.

Explore the docs to learn more

Sponsor Hacking with Swift and reach the world's largest Swift community!

Similar solutions…

• How to fix “Initializer 'init(_:rowContent:)' requires that ‘SomeType’ conform to 'Identifiable’”
• How to fix “Fatal error: No ObservableObject of type SomeType found”
• How to fix “Property declares an opaque return type, but has no initializer expression from which to infer an underlying type”
• What is the @ObservedObject property wrapper?
• What’s the difference between @ObservedObject, @State, and @EnvironmentObject?