ios - 从 TableViewCell 行获取当前子 ID 到另一个 View Controller 并通过添加新字段更新此子 ID

Question

我有以下代码。数据库树、客户类、CustomerAddViewController、CustomerViewController 和 OrderAddViewController。单击该行时，我想从 CustomerViewController TableView 行中获取如数据库树中所示的客户子键，并将其转发到 OrderAddViewController 并更新正确选择的行的客户键，并生成一个带有新字段的新订单键，如 OrderAddViewController 所示在数据库树中。谁能帮我解决这个问题？我可以将客户子键作为 CustomerKey 转发给 OrderAddViewController，但我无法编写订单字段来更正客户子键。我该怎么做？

数据库树:

    -Customers
       -L9foIoskS8pOdKVI8BN <----- Customers Child Key
            -created by: "Test Test"
            -created by id: "khfRNU9vDTXSUqH5ArZhStzEmEr1"
            -customer address: "ABC"
            -customer id: "-L9foIoskS8pOdKVI8BN"
            -customer name: "Test 11"
            -customer phone: "0123456789"
            -customer reference: "XYZ"
            -customer school name: "DEF"
            -customer type: "Customer Type A"
            -timestamp: "10.04.2018 01:13:44"
--------->  - I want to add a new Uniq ID here and add Order Details under this  like below
                -order period: 
                -order id:
                -order school name:
                -order name:
                -order girl count:
                -order boy count:
                -order shoes count:
                -order delivery date:
                -order return date:
                -order created by:
                -order created by id:
                -timestamp:
       -L9gSIWPcWnWdkl2kPUx
            -created by: "Test Test"
            -created by id: "khfRNU9vDTXSUqH5ArZhStzEmEr1"
            -customer address: "ABC"
            -customer id: "-L9gSIWPcWnWdkl2kPUx"
            -customer name: "Test 12"
            -customer phone: "0123456789"
            -customer reference: "XYZ"
            -customer school name: "DEF"
            -customer type: "Customer Type A"
            -timestamp: "10.04.2018 01:13:44"

客户.swift

import UIKit

class Customer: NSObject {

    var customertype: String?
    var customerid: String?
    var customername: String?
    var customerphone: String?
    var customerreference: String?
    var customerschoolname: String?
    var customeraddress: String?
}

CustomerAddViewController.swift

import UIKit
import Firebase

class CustomerAddViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {

    @IBOutlet weak var customertypeField: UITextField!
    @IBOutlet weak var customernametextField: UITextField!
    @IBOutlet weak var customerphonetextField: UITextField!
    @IBOutlet weak var customerreferencetextField: UITextField!
    @IBOutlet weak var customerschooltextField: UITextField!
    @IBOutlet weak var customeraddresstextField: UITextField!

    let customertypes = ["Hoca", "Tek", "Kargo"]
    var customertypepickerView = UIPickerView()

    var ref: DatabaseReference!

    override func viewDidLoad() {
        super.viewDidLoad()

        customertypepickerView.delegate = self
        customertypepickerView.dataSource = self
        customertypeField.inputView = customertypepickerView
        customertypeField.textAlignment = .center

        ref = Database.database().reference()

    }

    @IBAction func cancelBtnPressed(_ sender: Any) {
        dismiss(animated: true, completion: nil)
    }

    @IBAction func saveBtnPressed(_ sender: Any) {

        let key = ref.child("Customers").childByAutoId().key

        guard customernametextField.text != "", customerphonetextField.text != ""  else {return}

        let date = Date()
        let df = DateFormatter()
        df.dateFormat = "dd.MM.yyyy HH:mm:ss"
        let timestamp = df.string(from: date)

        let CustomerInfo: [String: Any] = ["customer type" : self.customertypeField.text!,
                                           "customer id" : key,
                                           "customer name" : self.customernametextField.text!,
                                           "customer phone": self.customerphonetextField.text!,
                                           "customer reference": self.customerreferencetextField.text!,
                                           "customer school name":self.customerschooltextField.text!,
                                           "customer address":customeraddresstextField.text!,
                                           "created by" : Auth.auth().currentUser!.displayName!,
                                           "created by id" : Auth.auth().currentUser!.uid,
                                           "timestamp": timestamp]

        self.ref.child("Customers").child(key).setValue(CustomerInfo)
        print(self.customernametextField.text! + " - Customer created.")

        dismiss(animated: true, completion: nil)
    }

    public func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }

    public func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return customertypes.count

    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return customertypes[row]
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        customertypeField.text = customertypes[row]
        customertypeField.resignFirstResponder()

        if customertypeField.text != "Hoca" {
            customerreferencetextField.isHidden = false
            customerschooltextField.isHidden = false
            customeraddresstextField.isHidden = false
        } else {
            customerreferencetextField.isHidden = true
            customerschooltextField.isHidden = true
            customeraddresstextField.isHidden = true

        }

    }
}

CustomerViewController.swift

import UIKit
import Firebase

class CustomerViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

    @IBOutlet weak var customertableview: UITableView!

    var customerList = [Customer]()

    override func viewDidLoad() {
        super.viewDidLoad()

        retrieveCustomers()

    }

    func retrieveCustomers() {

        Database.database().reference().child("Customers").queryOrdered(byChild: "customer type").observe(.childAdded, with: { (snapshot: DataSnapshot) in

            let customers = Customer()

            if let value = snapshot.value as? [String: Any] {
                let type = value["customer type"] as? String ?? "Customer Type not found."
                let id = value["customer id"] as? String ?? "Customer Type not found."
                let name = value["customer name"] as? String ?? "Customer Name not found."
                let phone = value["customer phone"] as? String ?? "Customer Phone not found."
                let reference = value["customer reference"] as? String ?? "Customer Reference not found."
                let school = value["customer school"] as? String ?? "Customer School Name not found."
                let address = value["customer address"] as? String ?? "Customer Address not found."
                customers.customertype = type
                customers.customerid = id
                customers.customername = name
                customers.customerphone = phone
                customers.customerreference = reference
                customers.customerschoolname = school
                customers.customeraddress = address
                self.customerList.append(customers)
            }
            self.customertableview.reloadData()
        })
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return customerList.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath ) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "CustomerCell", for: indexPath) as? CustomerTableViewCell

        let customers = customerList[indexPath.row]
        cell?.nametextField.text = customers.customername
        cell?.phonetextField.text = customers.customerphone
        cell?.typetextField.text = customers.customertype
        return cell!
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if(segue.identifier == "CustomerToOrder") {
            if let indexPath = self.customertableview.indexPathForSelectedRow {
            let orderAddVC:OrderAddViewController = segue.destination as! OrderAddViewController
                let story = customerList[indexPath.row]
                orderAddVC.CustomerKey = [story.customerid as! String]
        }
        }
    }
}

OrderAddViewController.swift

import UIKit
import Firebase

class OrderAddViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {

    @IBOutlet weak var orderperiodtextField: UITextField!
    @IBOutlet weak var schoolnametextField: UITextField!
    @IBOutlet weak var ordernametextField: UITextField!
    @IBOutlet weak var girlcounttextField: UITextField!
    @IBOutlet weak var boycounttextField: UITextField!
    @IBOutlet weak var shoestextField: UITextField!
    @IBOutlet weak var orderdeliverydatetextField: UITextField!
    @IBOutlet weak var orderreturndatetextField: UITextField!
    @IBOutlet weak var notetextField: UITextField!

    let orderperiod = ["Nisan", "Mayıs", "Haziran"]
    var orderperiodpickerView = UIPickerView()

    var CustomerKey:[String] = []

    var ref: DatabaseReference!

    override func viewDidLoad() {
        super.viewDidLoad()

        print(CustomerKey)

        orderperiodpickerView.delegate = self
        orderperiodpickerView.dataSource = self
        orderperiodtextField.inputView = orderperiodpickerView
        orderperiodtextField.textAlignment = .center

        ref = Database.database().reference()

    }

    @IBAction func backBtnPressed(_ sender: Any) {
        dismiss(animated: true, completion: nil)
    }

    @IBAction func saveBtnPressed(_ sender: Any) {

        let key = ref.child("Customers").childByAutoId().key

        let date = Date()
        let df = DateFormatter()
        df.dateFormat = "dd.MM.yyyy HH:mm:ss"
        let timestamp = df.string(from: date)

        let OrderInfo: [String: Any] = ["order period" : self.orderperiodtextField.text!,
                                        "order id" : key,
                                        "order school name" : self.schoolnametextField.text!,
                                        "order name": self.ordernametextField.text!,
                                        "order girl count": self.girlcounttextField.text!,
                                        "order boy count":self.boycounttextField.text!,
                                        "order shoes count":self.shoestextField.text!,
                                        "order delivery date":self.orderdeliverydatetextField.text!,
                                        "order return date":self.orderreturndatetextField.text!,
                                        "order created by" : Auth.auth().currentUser!.displayName!,
                                        "order created by id" : Auth.auth().currentUser!.uid,
                                        "timestamp": timestamp]

        self.ref.updateChildValues(["/Customers/\(key)/": OrderInfo])
        print(self.ordernametextField.text! + " - Order created.")

        dismiss(animated: true, completion: nil)
    }

    public func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }

    public func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return orderperiod.count

    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return orderperiod[row]
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        orderperiodtextField.text = orderperiod[row]
        orderperiodtextField.resignFirstResponder()
    }
}

更新 1:

如果我如下更改代码，错误消息是“无法将类型 '[String]' 的值转换为预期的参数类型字符串”。

let key = ref.child("Customers").child(CustomerKey).childByAutoId().key如果我只更改下面的代码，那么应用程序就会因此崩溃。由于未捕获的异常“InvalidFirebaseData”而终止应用程序，原因:“(updateChildValues:) 对象中的键无效。键必须是非空的并且不能包含“.” '#' '$' '[' 或 ']''

self.ref.updateChildValues(["/Customers/(CustomerKey)/(key)/": OrderInfo])使用 CustomerAddViewController，我已经创建了如下所示的数据库树

-Customers
   -L9foIoskS8pOdKVI8BN <----- Customers Child Key
        -created by: "Test Test"
        -created by id: "khfRNU9vDTXSUqH5ArZhStzEmEr1"
        -customer address: "ABC"
        -customer id: "-L9foIoskS8pOdKVI8BN"
        -customer name: "Test 11"
        -customer phone: "0123456789"
        -customer reference: "XYZ"
        -customer school name: "DEF"
        -customer type: "Customer Type A"
        -timestamp: "10.04.2018 01:13:44"

--------> - 这部分需要在更新时添加。 -订购时间: - 订单编号: -订购学校名称: -订单名称: -订购女孩数量: -订购男孩数量: -订购鞋子数量: -订单交货日期: - 订单返回日期: -订单创建者: - 由 id 创建的订单: -时间戳:我需要使用 OrderAddViewController 更新数据库树，但我认为转发 CustomerKey 是错误的或此技术是错误的。但是我没有找到从 tableview 中单击行然后通过 OrderAddViewController 更新所选表的好方法。

Answer 1

你的问题是这一行:

self.ref.updateChildValues(["/Customers/\(key)/": OrderInfo])

您要告诉 Firebase 将数据写入您刚刚创建的 Customers -> Key。

您需要 Customers -> CustomerKey -> Key。

更新

在 class OrderAddViewController: 中，将 var CustomerKey:[String] = [] 更改为 var customerKey:String?

在 class CustomerAddViewController 中更新 override func prepare(for segue: UIStoryboardSegue, sender: Any?) 这样你就可以传递客户 id 字符串。

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if(segue.identifier == "CustomerToOrder") {
            if let indexPath = self.customertableview.indexPathForSelectedRow {
                let orderAddVC:OrderAddViewController = segue.destination as! OrderAddViewController
                if let customerId = customerList[indexPath.row].customerid {
                    orderAddVC.customerKey = customerId
                }
            }
        }
    }

我建议进行以下更改:

self.ref.updateChildValues(["/Customers/\(key)/": OrderInfo])

应该是

self.ref.updateChildValues(["/Customers/-L9foIoskS8pOdKVI8BN/\(key)/": OrderInfo])

使用我们得到的传递变量

self.ref.updateChildValues(["/Customers/\(customerId!)/\(key)/": OrderInfo])

不确定这是否重要，但您可能还想更改:

let key = ref.child("Customers").childByAutoId().key

收件人:

let key = ref.child("Customers").child(customerId!).childByAutoId().key

根据您的评论，您原来的 CustomerKey 似乎是一个字符串数组，因此您可以使用 CustomerKey[0]

传递所需的字符串值

希望这有助于...