Parse EKEventStoreChanged notification user info

EventStoreNotificationInfo.swift

struct EventStoreNotificationInfo {
    let changeType: Int
    let calendarDataChanged: Bool
    let remindersDataChanged: Bool
    let changedObjectIDs: [NSObject]
    let modifiedObjectIdentifiers: Set<String>? // Not included in iOS 16?

    struct UserInfoKeys {
        static let changeType = "EKEventStoreChangeTypeUserInfoKey"
        static let calendarDataChanged = "EKEventStoreCalendarDataChangedUserInfoKey"
        static let remindersDataChanged = "EKEventStoreRemindersDataChangedUserInfoKey"
        static let changedObjectIDs = "EKEventStoreChangedObjectIDsUserInfoKey"
        static let modifiedObjectIdentifiers = "EKEventStoreModifiedObjectIdentifiers"
    }

    init?(_ userInfo: [AnyHashable: Any]?) {
        guard
            let changeType = userInfo?[UserInfoKeys.changeType] as? NSNumber,
            let calendarDataChanged = userInfo?[UserInfoKeys.calendarDataChanged] as? NSNumber,
            let remindersDataChanged = userInfo?[UserInfoKeys.remindersDataChanged] as? NSNumber,
            let changedObjectIDs = userInfo?[UserInfoKeys.changedObjectIDs] as? [NSObject]
        else { return nil }

        self.changeType = changeType.intValue
        self.calendarDataChanged = calendarDataChanged.boolValue
        self.remindersDataChanged = remindersDataChanged.boolValue
        self.changedObjectIDs = changedObjectIDs
        modifiedObjectIdentifiers = userInfo?[UserInfoKeys.modifiedObjectIdentifiers] as? Set<String>
    }
}

NotificationCenter.default.addObserver(forName: .EKEventStoreChanged, object: nil, queue: nil) { note in
    guard let info = EventStoreNotificationInfo(note.userInfo) else { return }
    print(info)
}

Updated: modifiedObjectIdentifiers changed to optional

In this case I suggest an extension is quite easier to use

extension Notification {
    var changeType: Int? {
        (userInfo?["EKEventStoreChangeTypeUserInfoKey"] as? NSNumber)?.intValue
    }
    var calendarDataChanged: Bool? {
        (userInfo?["EKEventStoreCalendarDataChangedUserInfoKey"] as? NSNumber)?.boolValue
    }
    var remindersDataChanged: Bool? {
        (userInfo?["EKEventStoreRemindersDataChangedUserInfoKey"] as? NSNumber)?.boolValue
    }
    var changedObjectIDs: [NSObject]? {
        userInfo?["EKEventStoreChangedObjectIDsUserInfoKey"] as? [NSObject]
    }
    var modifiedObjectIdentifiers: Set<String>? {
        userInfo?["EKEventStoreModifiedObjectIdentifiers"] as? Set<String>
    }
}