Question

我创建的应用程序能够从firebase读取数据没问题。但是，当我尝试向其写入数据时，似乎并没有起作用。我检查了我的规则以确保＆＃34; .write＆＃34;设置为true，仍然没有看到任何弹出窗口。

尝试将事件写入firebase，如下所示：ref?.child(email).child("events").setValue("Test")

电子邮件变量有一个值，但要仔细检查它是不是奇怪的事我甚至尝试用电子邮件代替＆＃34;测试＆＃34;。不知道我哪里可能出错，任何帮助都是天赐之物！

完整的参考代码：

//
//  NewEventToCreateVC.swift
//  WSUStudentEvents
//
//  Created by Colin Warn on 7/31/17.
//  Copyright © 2017 Colin Warn. All rights reserved.
//

import UIKit
import FirebaseDatabase
import Firebase

class NewEventToCreateVC: UIViewController {
    var eventToCreate: UserEvent?



    @IBOutlet weak var titleOutlet: UILabel!
    @IBOutlet weak var startTimeOutlet: UILabel!
    @IBOutlet weak var endTimeOutlet: UILabel!
    @IBOutlet weak var eventTypeOutlet: UILabel!
    @IBOutlet weak var locationOutlet: UILabel!
    @IBOutlet weak var descriptionOutlet: UITextView!
    @IBOutlet weak var passwordOutlet: UILabel!

    let defaults = UserDefaults.standard

    var ref: DatabaseReference?

    override func viewDidLoad() {
        super.viewDidLoad()

        ref = DatabaseReference().database.reference()

        let formatter = DateFormatter()
        formatter.dateStyle = .short
        formatter.timeStyle = .short
        var startDateString = ""
        var endDateString = ""
        if let startTime = eventToCreate?.startTime, let endTime = eventToCreate?.endTime {
            startDateString = formatter.string(from: startTime)
            endDateString = formatter.string(from: endTime)
        }


        titleOutlet.text = eventToCreate?.eventName
        startTimeOutlet.text = startDateString
        endTimeOutlet.text = endDateString
        eventTypeOutlet.text = eventToCreate?.eventType
        locationOutlet.text = eventToCreate?.eventLocation
        descriptionOutlet.text = eventToCreate?.description
        if let password = eventToCreate?.password {
            if password == "" {
                passwordOutlet.text = "(no password)"
            } else {
                passwordOutlet.text = "Password: \(password)"
            }

        }


        // Do any additional setup after loading the view.

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    override func viewDidAppear(_ animated: Bool) {
        print("EVENT TO CREATE, new VC data transfer check")
        print(eventToCreate)
        print(eventToCreate?.eventName)
    }


    @IBAction func addEventPressed(_ sender: Any) {
        uploadDataToFirebase()
    }



    @IBAction func backBtnPressed(_ sender: Any) {
        let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

        let nextViewController = storyBoard.instantiateViewController(withIdentifier: "AddEventViewModelVC") as! AddEventViewModelVC
        if let eventName = eventToCreate?.eventName {
            nextViewController.eventName = eventName
        }

        if let eventLocation = eventToCreate?.eventLocation {
            nextViewController.eventLocation = eventLocation
        }

        nextViewController.startTime = eventToCreate?.startTime
        nextViewController.endTime = eventToCreate?.endTime
        if let description = eventToCreate?.description {
            nextViewController.eventDescription = description
        }

        if let password = eventToCreate?.password {
            nextViewController.password = password

        }

        if let eventType = eventToCreate?.eventType
        {
            nextViewController.eventType = eventType
        }
        nextViewController.eventEnum = .password



        self.present(nextViewController, animated:true, completion: {
            nextViewController.titleLabel.text = nextViewController.eventEnum.rawValue
            nextViewController.textField.text = self.eventToCreate?.password
        })
    }

    func uploadDataToFirebase(){


        let email = defaults.object(forKey: "email") as! String
        print(email)

        //Email->Events->Data

        //Set Email


        //Set events
        ref?.child(email).child("events").setValue("Test")



    }

}

提前非常感谢你：

Answer 1

将事情简化为最小代码通常有助于排除故障。例如，试试这个

@class xxxx
  var ref: DatabaseReference!

  override func viewDidLoad() {
       super.viewDidLoad()

       ref = Database.database().reference()
       ref.child("events").setValue("test")
  }

这将导致像这样的Firebase

root_ref
   events: "test"

在Firebase调用中包含闭包也是一个好主意，这样你就可以捕获任何错误......所以你可以使用setValue代替setValue完成块（swift中的闭包）

let eventsRef = self.ref.child("events")
eventsRef.setValue("test", withCompletionBlock: { error in
    if error != nil {
        print(error)
    }
})

Firebase可以阅读，但我不能发布

1 个答案: