使用Swift从Firebase中的所有孩子获取数据 [英] Get the data from all children in firebase using swift

问题描述

我有一个firebase实时数据库.看起来像这样:

I have a firebase realtime database. It looks like this:

这是我的代码:

ref.child("2").observeSingleEvent(of: .value, with: { snapshot in

        guard let dict = snapshot.value as? [String:Any] else {
            print("Error")
            return
        }
        let latitude = dict["Latitude"] as Any
        let longtitude = dict["Longtitude"] as Any
        print(longtitude)
        print(latitude)
    })

我的问题是我的代码仅从名为2的孩子那里检索数据.如何使它从所有孩子那里检索数据?

My problem is that my code retrieves the data from only the child called 2. How can I make it retrieve the data from all the children?

如果您有任何疑问，请告诉我.感谢您的帮助！

If you have any questions just let me know. Thanks for any help!

推荐答案

您需要在JSON中将观察者附加上一层，然后循环遍历子节点:

You'll want to attach the observer one level higher in the JSON, and then loop over the child nodes:

ref.observeSingleEvent(of: .value) { snapshot in
    for case let child as FIRDataSnapshot in snapshot.children {
        guard let dict = child.value as? [String:Any] else {
            print("Error")
            return
        }
        let latitude = dict["Latitude"] as Any
        let longtitude = dict["Longtitude"] as Any
        print(longtitude)
        print(latitude)
    }
}

取自在Firebase中对快照子代进行迭代的循环语法，请参阅>如何循环播放所有内容一次在同一循环中找到Firebase孩子?和在Firebase中循环

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