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如何在Firebase数据库中追加子项中的数据?以下是我的代码。如何在Firebase数据库中追加子项中的数据?
import UIKit
import Firebase
import FirebaseDatabase
class MedalViewController: UICollectionViewController {
var imagesArray = [String]()
var identities = [String]()
var identities2 = [String]() //Creates an empty array
var imagesArrayGreyed = [String]()
let databaseRef = FIRDatabase.database().reference()
let userID = FIRAuth.auth()?.currentUser?.uid
override func viewDidLoad() {
super.viewDidLoad()
imagesArray = ["1", "2", "3"] //Add all the medal images here
identities = ["Shield", "Tie", "Star"] //Add all the identities here
identities2 = ["Shield"] //Choose what medals the user has.
imagesArrayGreyed = ["1Greyed","2Greyed","3Greyed"] //Add all the greyed images here
databaseRef.child("users").child(userID!).observeSingleEventOfType(.Value, withBlock: { (snapshot) in
// Get user value
var newIdentities2 = snapshot.value!["medals"] as! String
// how do I continue on from here?
// ...
}) { (error) in
print(error.localizedDescription)
}
}
这是我的火力地堡数据结构的一个图:
数据应该被打开时ViewController
只能使用一次获得,然后附加到阵列。谢谢你的帮助。
编辑:其目的是从火力子获得数据“奖牌”,并将它附加到本地阵列“identifier2”