ios - Firestore 读取旧数据

Question

我已经删除了我的“卡片”收藏中的所有文档。但我的旧数据不断出现!我最近更新了我的 Firebase Pod。

这是我的阅读数据代码:

CARDS_REF.addSnapshotListener({ (snapshot, error) in
            if let error = error {
                debugPrint("ERROR WHILE FETCHING CARDS: \(error.localizedDescription)")
                return
            }

            var newCards = [Card]()
            guard let snaps = snapshot else { return }
            for snap in snaps.documents {
                let newCard = Card(key: snap.documentID, dictionary: snap.data() as [String: AnyObject])

                let timeStamp = newCard.expirationDate
                let expirationDate: Date = timeStamp!.dateValue()
                let currentDate = Date()

                if currentDate < expirationDate {
                   newCards.append(newCard)
                }
            }

            self.cards = newCards
            self.mainVC?.cardsLoaded()
        })

这是CARDS_REF:

let firestoreRef = Firestore.firestore() // <-- Declared outside of class
fileprivate var _CARDS_REF = firestoreRef.collection("cards") // <-- Declared inside DataService class

var CARDS_REF: CollectionReference { // <-- Declared inside DataService class
    return _CARDS_REF
}

有什么想法吗？谢谢!

Answer 1

是的，Firebase 正在为您缓存数据。要禁用此功能，请执行以下操作:

let settings = FirestoreSettings()
settings.isPersistenceEnabled = false
db.settings = settings // db is your firebase database reference.