Swift 6 actor error in didReceiveRemoteNotification of UIApplicationDelegate

Question

Created Jun ’24

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Boosts 1

Participants 2

From Xcode 16.0 Beta I am getting the following error at didReceiveRemoteNotification of UIApplicationDelegate protocol:

Non-sendable type '[AnyHashable : Any]' in parameter of the protocol requirement satisfied by main actor-isolated instance method 'application(_:didReceiveRemoteNotification:)' cannot cross actor boundary; this is an error in the Swift 6 language mode

Generic struct 'Dictionary' does not conform to the 'Sendable' protocol (Swift.Dictionary)

How can I fix this warning before moving to Swift 6 mode.

Answered by oogafish in 799590022

@zoha131 Please add @MainActor before the AppDelegate class:

@MainActor
class AppDelegate: NSObject, UIApplicationDelegate, UNUserNotificationCenterDelegate {
    func application(_ application: UIApplication,
                     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        UNUserNotificationCenter.current().delegate = self
        return true
    }

    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]) async -> UIBackgroundFetchResult {
        return .noData
    }
}

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Answer 1

oogafish OP

Aug ’24

Accepted Answer

@zoha131 Please add @MainActor before the AppDelegate class:

@MainActor
class AppDelegate: NSObject, UIApplicationDelegate, UNUserNotificationCenterDelegate {
    func application(_ application: UIApplication,
                     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        UNUserNotificationCenter.current().delegate = self
        return true
    }

    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]) async -> UIBackgroundFetchResult {
        return .noData
    }
}

0

Answer 2

oogafish OP

3w

Did my answer help you at all zoha131? I'm just curious.

Thanks, Mark

0