如何在Swift的Firebase中的嵌套键中获取值 [英] How to get values inside nested keys in Firebase on Swift

问题描述

我正在尝试在Firebase中的两个嵌套键中获取值.

I'm trying to get values inside two nested keys in Firebase.

:

我需要将name的所有值放入数组中.这是我仅访问节点用户"的代码.我当时以为我可以一个接一个地使用"queryOrderedByKey"，但是在那种情况下，xCode崩溃了，并说不允许多次查询.

I need to put all the value of name inside an array. Here is my code where I'm accessing just the node "user". I was thinking that I could use "queryOrderedByKey" one after another, but in that case xCode crashes and says something like multiple quires aren't allowed.

        Database.database().reference().child("user").queryOrderedByKey().observe(.childAdded) { (snapshot) in

        if snapshot.value != nil {

            let result = snapshot.value as! [String : AnyObject]

            if let name = result["name"] as? String {
                self.myArray.append(name)
            }

            DispatchQueue.main.async(execute: {
                self.tableView.reloadData()
            })

        }
    }

这就是打印结果时得到的.

And this is what I'm getting when printing the result.

推荐答案

这是答案

        Database.database().reference().child("user").observe(.childAdded) { (snapshot) in

        if let dictinoary = snapshot.value as? [String: Any] {
            if let myFinalStep = dictinoary["GeneralInformation"] as? [String: Any] {
                print(myFinalStep["name"])

            }
        }
    }

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