Question

我的上传代码在这里

import UIKit
import Firebase

class ChatViewController: UIViewController {

    let chatRef = FIRDatabase.database().reference().child("chat")
    let userUid = FIRAuth.auth()?.currentUser?.uid
    var userName = ""
    @IBOutlet weak var topBar: UINavigationItem!
    @IBOutlet weak var containerView: UIView!
    @IBOutlet var inputTextField: UITextField!
    override func viewDidLoad() {
    super.viewDidLoad()
    topBar.title = "Chat Log Controller"
    FIRDatabase.database().reference().child("users/\(userUid!)/name").observe(.value) { (snap: FIRDataSnapshot) in
        self.userName = (snap.value! as! String).description
    }
}

@IBAction func handleSend(_ sender: AnyObject) {
    let childChatRef = chatRef.childByAutoId()
    let message = inputTextField.text!
    childChatRef.child("text").setValue(message)
    print(inputTextField.text)
}

@IBAction func handleSendByEnter(_ sender: AnyObject) {
    let childChatRef = chatRef.childByAutoId()
    let message = inputTextField.text!
    print(userName)
    childChatRef.child("name").setValue(userName)
    childChatRef.child("text").setValue(message)
    print(inputTextField.text)
}

}

文字已成功上传但是它不会打印userName，也不会将其上载到Firebase数据库但用户名是坚果零！

Answer 1

尝试使用您的观察者代码，

ref.observeSingleEventOfType(.Value, withBlock: { snapshot in

}

Answer 2

只需self.username = snap.value! as! String 它会解决你的问题。

Firebase数据库未上载

2 个答案: