ios - 如何从 Firebase Cloud Firestore 提取数据

Question

我正在尝试从 Firebase Firestore 中提取所有对象(参见下图)。如何将输出结果添加到字典中？

func getLinks() {
    let user = Auth.auth().currentUser
    let userID = user?.uid
    let db = Firestore.firestore()
    print(userID!)
    let docRef = db.collection("files").document(userID!)

    docRef.getDocument { (document, error) in
        if let document = document, document.exists {
            let dataDescription = document.data().map(String.init(describing:)) ?? "nil"
            print("Document data: \(dataDescription)")
        } else {
            print("Document does not exist")
        }
    }

}

Output Image

Answer 1

从 Firebase 获取数据然后使用它

步骤:-1获取数据

    var dictData = [String:Any]() 
    let ref = Database.database().reference()
    ref.observe(.childAdded, with: { (snapshot) in
        print(snapshot.value!)
        self.dictData = snapshot.value as! [String : Any]
        print(self.dictData)
       
    })

步骤:- 2从快照中提取数据

var arrFetchedData:NSMutableArray = NSMutableArray()
    
    for data in dictData{
        print(data.key) //Key will be printed here
        
        var tempDict:NSMutableDictionary = NSMutableDictionary()
        
        let innerData = data.value as! [String:Any]
        
        let expires = innerData["expires"]
        tempDict.setValue(expires, forKey: "expires")
        let name = innerData["name"]
        tempDict.setValue(name, forKey: "name")
        let url = innerData["url"]
        tempDict.setValue(url, forKey: "url")
        arrFetchedData.add(tempDict)
    }
    
    print(arrFetchedData) //All the Fetched data will be here

希望这有帮助!