What is the difference between @stateobject and @observedobject in swiftui
Generated on 9/15/2024
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In SwiftUI, @StateObject and @ObservedObject are both used for managing state in your views, but they serve different purposes:
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@StateObject: This is used to create a new instance of an observable object. You should use@StateObjectwhen you are initializing an observable object within a view. It ensures that the object is created once and persists for the lifetime of the view. This is particularly useful when the view is responsible for creating and owning the lifecycle of the object. -
@ObservedObject: This is used to observe an existing observable object. You should use@ObservedObjectwhen the object is created and managed elsewhere, and you just want to observe changes to it. It does not create or own the object, but rather listens for changes to update the view accordingly.
In summary, use @StateObject when the view is responsible for creating the object, and use @ObservedObject when the object is created outside the view and you just need to observe it.
For more details on state management in SwiftUI, you can refer to the SwiftUI essentials session.
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