Firebase将数据追加到节点

Question

如何将数据追加到Firebase中的节点？值更新只是一个字符串，而不是字典。

Firebase应该能够增加每个项目。我认为update会工作，但只会更新字典。当我尝试设置值时，它会擦除​​所有内容。

FIRDatabase().reference().database.childRef(refUrl: path).updateChildValues([:]) 

实施例：

node{ 
     1:itemOne 
     2:itemTwo 
     3:itemThree 
} 

Answer 1

从火力文档

https://firebase.google.com/docs/database/ios/read-and-write

Update specific fields To simultaneously write to specific children of a node without overwriting other child nodes, use the updateChildValues method.

试somethi ng like

let key = ref.child("node").childByAutoId().key 
let post = ["uid": userID, 
      "author": username, 
      "title": title, 
      "body": body] 
let childUpdates = ["/posts/\(key)": post, 
        "/user-posts/\(userID)/\(key)/": post] 
ref.updateChildValues(childUpdates)