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。
最佳答案
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]
希望这有助于...
关于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，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49921796/