ios - 如何检索某些 childByAutoId() 键

Question

我环顾四周，没有运气。我需要在 firebase 中获取某个字典键的字符串值。

如果你看下面的图片，我需要那个键在上面，并且需要将它设置为一个字符串，这样我就可以连接到其他 View Controller ，所以当用户想要在共享者下发帖时，例如，我根据 key 进入正确的值，然后到共享者，我可以在其中添加值。谢谢，我也不需要所有值，一旦我观察到 WithSingleEvent，我就需要获取每个页面或字典的键。

我的代码:

    let ref = FIRDatabase.database().reference()
    ref.child("Notes").queryOrderedByKey().observeSingleEvent(of: .value, with: { snapshot in
        if let pagers = snapshot.value as? [String : AnyObject] {
           let numb = snapshot.key //what I want
            for (_, val) in pagers {
                if let useri = val["postUsername"] as? String {
                    if useri == FIRAuth.auth()?.currentUser?.uid {

                        let bindfl = Page()
                        if let title = val["title"] as? String, let descript = val["description"] as? String,
                            let sharers = val["sharers"] as? [String], let poster = val["postUsername"] as? String, let setter = val["setter"] as? String, let creatorName = val["creatorName"] as? String {
                            bindfl.title = title
                            bindfl.descriptions = descript
                            bindfl.setter = setter
                            bindfl.sharers = sharers
                            bindfl.usernameOfBinder = poster
                            bindfl.creatorName = creatorName
                            bindfl.theBit = numb

                            self.pages.append(bindfl)

Answer 1

当你向数据库中添加数据时，你可以这样做

let key = ref.("Notes").childByAutoId().key
let notes = ["userName": userName,
            "description": description,
            "title": title,
            "author": author,
            "keyID": key]
let childUpdates = ["/Notes/\(key)": notes]
ref.updateChildValues(childUpdates)

之后就可以了，这样获取key

bindfl.title = title
bindfl.descriptions = descriptions
bindfl.userName = userName
bindfl.author= author
bindfl.keyID= keyID

希望它有用。