swift - Firebase Realtime DB - 从数组获取特定数据？

Question

我有一个 FB 实时数据库，我正在查询其中的一部分。

let databaseRef = Database.database().reference(withPath: "developer")
    databaseRef.observe(.value) { (snapshot) in
    snapshot.children.forEach({ (child) in
        print(child)
    })
 }

这将打印以下内容:

Snap (0) {
    email = "foo@bar.com";
    id = 1;
    image = "dolecki.png";
    name = "Mr. Dolecki";
}
Snap (1) {
    email = "foo@bar.com";
    id = 2;
    image = "bourque.png";
    name = "Mr. Bourque";
}
Snap (2) {
    email = "foo@bar.com";
    id = 3;
    image = "shaw.png";
    name = "Mr. Shaw";
}

如何从这些内容中提取我想要的部分(例如每个名称、ID 等)？我无法转换为字典，因为我收到一条错误，指出它作为数组出现。

Answer 1

我想我现在已经拥有了。

let databaseRef = Database.database().reference(withPath: "developer")
    databaseRef.observe(.value) { (snapshot) in
        print(snapshot.childrenCount) //3
        if let snapshot = snapshot.children.allObjects as? [DataSnapshot] {
            for snap in snapshot {

                if let postDict = snap.value as? Dictionary<String, AnyObject> {
                    if let name = postDict["name"] {
                        print(name)
                    }
                    //print(postDict.keys) // name, email, id, image
                } else {
                    print("Failed to convert.")
                }
            }
        }
    }