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SwiftUI: Access @EnvironmentObject from AppDelegate

I want to use the applicationWillTerminate function to save some user defaults before the app closes. The data I want to save is stored in an EnvironmentObject.

How can I access it from the AppDelegate class?

Solution

  • An @EnvironmentObject doesn't need to be instantiated directly in your SwiftUI objects; rather, it can be allocated somewhere else (for example, your UISceneDelegate) and then passed through using the .environment(…) function.

    You could also allocate it on your AppDelegate, and pass that object though to your views in UISceneDelegate.scene(_:willConectTo:options:) method.

    Paul Hudson has a good description of all of this at https://www.hackingwithswift.com/quick-start/swiftui/how-to-use-environmentobject-to-share-data-between-views