使用表格显示添加的用户及其数据
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【中文标题】使用表格显示添加的用户及其数据【英文标题】：Use a table to display users added and their data 【发布时间】：2020-07-27 20:17:30 【问题描述】：我是编码新手，过去几周一直在尝试找出当前的问题。
我发布了一堆询问同一问题的不同变体的帖子，并被告知我试图执行我的想法的方式不正确。
我正在尝试将数据集合发送到用户列表。这些数据涉及公司名称、公司形象、他们需要做出决定的日期以及发送日期。我目前能够将该信息发送到我的 firebase 数据库和公司形象的 firebase 存储。公司图片也以字符串形式存储在公司信息节点下。
我最初想要完成的是能够通过按下按钮来创建单元格。该表将使用四个文本字段填充一个单元格。名称文本字段将是我选择用户的位置。他们的 firebase 数据库名称将显示在文本字段中。然后，我可以在仅对应于该用户的其他三个文本字段中输入文本。用户将能够看到公司信息和日期，但只能看到他们的特定行数据。有人告诉我我不应该这样做，我决定冒险尝试另一种可能的解决方案。
现在的情况：
我用公司信息和添加按钮设置了相同的视图控制器。看起来像：
按下添加按钮时，会显示一个带有四个文本字段的新视图控制器。视图控制器名称文本字段允许用户从数据库中选择一个用户，并且文本更改为该人的姓名。它看起来像这样：
我使用名称文本字段来附加一个数组，然后将其用于第一个视图控制器中的表以确定行数。它当前正在附加数组但不填充任何单元格。我计划使用标签将用户和其他 3 个文本字段保存到同一行。但我什至无法填充任何单元格。
这是视图控制器的代码，它将在公司信息下方的表格中显示用户及其信息：
import UIKit
import Firebase
class ConsiderationsTestViewController: UIViewController, UITextFieldDelegate
@IBOutlet weak var tableView: UITableView!
static var numberOfPeople: [String] = []
var AddPersonCell = "AddPersonCell"
@IBOutlet weak var CompanyImage: UIImageView!
@IBOutlet weak var companyNameTextFieldConsiderations: UITextField!
@IBOutlet weak var companyDescriptionTextFieldConsiderations: UITextField!
@IBOutlet weak var startDateTextFieldConsiderations: UITextField!
@IBOutlet weak var endDateTextFieldConsiderations: UITextField!
let datePickerS = UIDatePicker()
let datePickerE = UIDatePicker()
var database: Database!
var storage: Storage!
var selectedImage: UIImage?
var ref:DatabaseReference?
var databaseHandle:DatabaseHandle = 0
let dbref = Database.database().reference()
let uid = Auth.auth().currentUser?.uid
override func viewDidLoad()
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
self.companyNameTextFieldConsiderations.delegate = self
self.companyDescriptionTextFieldConsiderations.delegate = self
// Set the Firebase reference
ref = Database.database().reference()
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(ConsiderationsTestViewController.handleSelectCompanyImageView))
CompanyImage.addGestureRecognizer(tapGesture)
CompanyImage.isUserInteractionEnabled = true
self.navigationController!.navigationBar.isTranslucent = false
navigationItem.backBarButtonItem = UIBarButtonItem(
title: "", style: .plain, target: nil, action: nil)
createDatePickerForStart()
createDatePickerForEnd()
@objc func handleSelectCompanyImageView()
let pickerController = UIImagePickerController()
pickerController.delegate = self
pickerController.allowsEditing = true
present(pickerController, animated: true, completion: nil)
@IBAction func AddPersonTapped(_ sender: Any)
@IBAction func sendButtonTapped(_ sender: Any)
let companyNameC = companyNameTextFieldConsiderations.text!.trimmingCharacters(in: .whitespacesAndNewlines)
let companyDescriptionC = companyDescriptionTextFieldConsiderations.text!.trimmingCharacters(in: .whitespacesAndNewlines)
let today = Date()
let formatter1 = DateFormatter()
formatter1.dateFormat = "MMM d y"
print(formatter1.string(from: today))
let todaysDate = formatter1.string(from: today)
let storageRef = Storage.storage().reference(forURL: " MY STORAGE URL HERE")
let imageName = companyNameTextFieldConsiderations.text!
let storageCompanyRef = storageRef.child("Company_Image_Considerations").child("\(todaysDate)").child(imageName)
let companyDescriptionTextFieldText = companyDescriptionTextFieldConsiderations.text
let dateToStart = startDateTextFieldConsiderations.text
let dateToDecide = endDateTextFieldConsiderations.text
let companyRef = Database.database().reference().child("Considerations").child("\(todaysDate)").child(imageName)
let index = IndexPath(row: 0,section: 0)
let cell = tableView.cellForRow(at:index) as! ConsiderationsCell
let nameTFC = cell.nameTextFieldConsiderations.text!.trimmingCharacters(in: .whitespacesAndNewlines)
let feedTFC = cell.feedTextFieldConsiderations.text!.trimmingCharacters(in: .whitespacesAndNewlines)
let storyTFC = cell.storyTextFieldConsiderations.text!.trimmingCharacters(in: .whitespacesAndNewlines)
let compensationTFC = cell.compensationTextFieldConsiderations.text!.trimmingCharacters(in: .whitespacesAndNewlines)
let values = ["Feed_Quantity": feedTFC, "Story_Quantity": storyTFC, "Compensation": compensationTFC]
let considerationInfluencerRef = Database.database().reference().child("Considerations").child("\(todaysDate)").child(imageName).child("Users").child("\(nameTFC)")
guard let imageSelected = self.CompanyImage.image else
print ("Avatar is nil")
return
var dict: Dictionary<String, Any> = [
"Company Image": "",
"Company Description": companyDescriptionTextFieldText!,
"Start Date": dateToStart!,
"Decision Date": dateToDecide! ]
guard let imageData = imageSelected.jpegData(compressionQuality: 0.5) else
return
let metadata = StorageMetadata()
metadata.contentType = "image/jpeg"
storageCompanyRef.putData(imageData, metadata: metadata, completion:
(StorageMetadata, error) in
if (error != nil)
return
storageCompanyRef.downloadURL (url, error) in
if let metadateImage = url?.absoluteString
dict["Company Image"] = metadateImage
companyRef.updateChildValues(dict, withCompletionBlock:
(error, ref) in
if error == nil
print("Done")
return
)
storageRef.updateMetadata(metadata) metadata, error in
if error != nil
//Uh-oh, an error occurred!
else
// Updated metadata for 'images/forest.jpg' is returned
)
considerationInfluencerRef.updateChildValues(values as [AnyHashable : Any]) (error, ref) in
if error != nil
print(error ?? "")
return
self.navigationController?.popViewController(animated: true)
func createDatePickerForStart()
// center text in field
startDateTextFieldConsiderations.textAlignment = .center
// toolbar
let toolbar = UIToolbar()
toolbar.sizeToFit()
// barbutton
let doneButton = UIBarButtonItem(barButtonSystemItem: .done, target: nil, action: #selector(donePressedStart))
toolbar.setItems([doneButton], animated: true)
// assign toolbar to textfield
startDateTextFieldConsiderations.inputAccessoryView = toolbar
// assign datePicker to text field
startDateTextFieldConsiderations.inputView = datePickerS
// date picker mode
datePickerS.datePickerMode = .date
func createDatePickerForEnd()
// center text in field
endDateTextFieldConsiderations.textAlignment = .center
// toolbar
let toolbar = UIToolbar()
toolbar.sizeToFit()
// barbutton
let doneButton = UIBarButtonItem(barButtonSystemItem: .done, target: nil, action: #selector(donePressedEnd))
toolbar.setItems([doneButton], animated: true)
// assign toolbar to textfield
endDateTextFieldConsiderations.inputAccessoryView = toolbar
// assign datePicker to text field
endDateTextFieldConsiderations.inputView = datePickerE
// date picker mode
datePickerE.datePickerMode = .dateAndTime
@objc func donePressedStart()
// formatter
let formatter = DateFormatter()
formatter.dateStyle = .medium
formatter.timeStyle = .none
startDateTextFieldConsiderations.text = formatter.string(from: datePickerS.date)
self.view.endEditing(true)
@objc func donePressedEnd()
// formatter
let formatter = DateFormatter()
formatter.dateStyle = .medium
formatter.timeStyle = .medium
endDateTextFieldConsiderations.text = formatter.string(from: datePickerE.date)
self.view.endEditing(true)
extension ConsiderationsTestViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
//print("did Finish Picking Media")
if let image = info[UIImagePickerController.InfoKey(rawValue: "UIImagePickerControllerEditedImage")] as? UIImage
selectedImage = image
CompanyImage.image = image
dismiss(animated: true, completion: nil)
extension ConsiderationsTestViewController: UITableViewDelegate, UITableViewDataSource
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
return ConsiderationsTestViewController.numberOfPeople.count
func numberOfSections(in tableView: UITableView) -> Int
return 1
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = tableView.dequeueReusableCell(withIdentifier: AddPersonCell, for: indexPath) as! ConsiderationsCell
return cell
这是我选择用户并输入他们各自信息的视图控制器的代码：
import UIKit
import Firebase
class DropDownCellViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UISearchBarDelegate, UITextFieldDelegate
var numberOfPeople = [String]()
var users = [User]()
var userName = [String]()
var filteredNames: [String]!
let dropDownCell = "dropDownCell"
var emptyField = [String]()
@IBOutlet weak var nameTextField: NoCopyPasteUITextField!
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var gridTextField: UITextField!
@IBOutlet weak var storyTextField: UITextField!
@IBOutlet weak var compensationTextField: UITextField!
@IBAction func textFieldChanged(_ sender: AnyObject)
tableView.isHidden = true
@IBAction func cancelButtonTapped(_ sender: Any)
self.navigationController?.popViewController(animated: true)
@IBAction func addButtonTapped(_ sender: Any)
ConsiderationsTestViewController.numberOfPeople.append("\(nameTextField.text!)")
self.navigationController?.popViewController(animated: true)
print(ConsiderationsTestViewController.numberOfPeople)
let searchController = UISearchController(searchResultsController: nil)
override func viewDidLoad()
super.viewDidLoad()
updateDataArray()
tableView.register(UserCell.self, forCellReuseIdentifier: dropDownCell)
filteredNames = userName
tableView.delegate = self
tableView.dataSource = self
nameTextField.delegate = self
tableView.isHidden = true
// Manage tableView visibility via TouchDown in textField
nameTextField.addTarget(self, action: #selector(textFieldActive), for: UIControl.Event.touchDown)
override func didReceiveMemoryWarning()
super.didReceiveMemoryWarning()
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?)
guard let touch:UITouch = touches.first else
return;
if touch.view != tableView
nameTextField.endEditing(true)
tableView.isHidden = true
@objc func textFieldActive()
tableView.isHidden = !tableView.isHidden
// MARK: UITextFieldDelegate
func textFieldDidEndEditing(_ textField: UITextField)
// TODO: Your app can do something when textField finishes editing
print("The textField ended editing. Do something based on app requirements.")
func textFieldShouldReturn(_ textField: UITextField) -> Bool
textField.resignFirstResponder()
return true
func numberOfSections(in tableView: UITableView) -> Int
// #warning Incomplete implementation, return the number of sections
return 1
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
// #warning Incomplete implementation, return the number of rows
return filteredNames.count
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = tableView.dequeueReusableCell(withIdentifier: dropDownCell, for: indexPath) as!
UserCell
let user = users[indexPath.row]
cell.textLabel?.text = user.name
if let profileImageUrl = user.profileImageUrl
cell.profileImageView.loadImageUsingCacheWithUrlString(urlString: profileImageUrl)
return cell
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
return 72
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
// Row selected, so set textField to relevant value, hide tableView
// endEditing can trigger some other action according to requirements
nameTextField.text = userName[indexPath.row]
tableView.isHidden = true
nameTextField.endEditing(true)
//Mark: Search Bar Config
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String)
filteredNames = []
if searchText == ""
filteredNames = userName
else
for names in userName
if names.lowercased().contains(searchText.lowercased())
filteredNames.append(names)
self.tableView.reloadData()
func updateDataArray()
Database.database().reference().child("users").observe(.childAdded, with: (snapshot) in
if let dictionary = snapshot.value as? [String: AnyObject]
let user = User()
//self.setValuesForKeys(dictionary)
user.name = dictionary["name"] as? String
user.email = dictionary["email"] as? String
user.facebookUrl = dictionary["facebookUrl"] as? String
user.instagramUrl = dictionary["instagramUrl"] as? String
user.linkedInUrl = dictionary["linkedInUrl"] as? String
user.profileImageUrl = dictionary["profileImageUrl"] as? String
user.twitterUrl = dictionary["twitterUrl"] as? String
user.id = dictionary["id"] as? String
user.userType = dictionary["userType"] as? String
self.users.append(user)
self.userName.append(user.name!)
self.filteredNames.append(user.name!)
DispatchQueue.main.async
self.tableView.reloadData()
, withCancel: nil)
我在原始视图控制器中有一个可以打印数组的按钮。我在尝试附加数组之前对其进行了测试。它是空的。然后我添加到人员并对其进行了测试。它打印了两个名称，但表格没有改变。我试图在添加按钮中 dispatch.resync 但它太模棱两可了。我真的可以使用帮助。谢谢！谢谢你的耐心。我是编码新手，除了自学外，没有任何编码方面的教育。
【问题讨论】：
【参考方案1】：我发现了如何重新加载数据。我只需要弄清楚如何将标签设置为等于文本字段文本。这样我就可以看到它并能够将其发送到 firebase。我修复它的方法是让我的添加按钮具有以下代码：
@IBAction func addButtonTapped(_ sender: Any)
ConsiderationsTestViewController.numberOfPeople.append("\(nameTextField.text!)")
self.navigationController?.popViewController(animated: true)
print(ConsiderationsTestViewController.numberOfPeople)
DispatchQueue.main.async
NotificationCenter.default.post(name: NSNotification.Name(rawValue: "load"), object: nil)
然后我将它插入到我想重新加载的视图控制器的 viewDidLoad 中：
NotificationCenter.default.addObserver(self, selector: #selector(loadList), name: NSNotification.Name(rawValue: "load"), object: nil)
【讨论】：
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