如何从弹出视图控制器获取数据到自定义表格视图单元格？
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【中文标题】如何从弹出视图控制器获取数据到自定义表格视图单元格？【英文标题】：How to get data from popup view controller to custom table view cell? 【发布时间】：2019-03-07 20:24:08 【问题描述】：我有 3 个视图控制器。首先是MainViewController。
在此MainViewController 中，自定义表格视图单元格为FoodCell 类，其中两个属性为name 和price。
我在MainViewController 中实例化这个对象，当点击到表格视图单元格时，这个对象传递到弹出窗口DetailViewController 这不是表格视图，它只有View 带有标签（foodName 和 foodPrice 标签）和AddToBasket 按钮.
最后我想将这个类对象从弹出窗口DetailViewController 传递给MyCartViewController。 MyCartViewController 是我展示foodNames 和foodPrices 对象的最后一个场景。
（例如，MainViewController 是我的食物菜单列表。DetailViewController 是我选择的食物列表。MyCartViewController 是我的市场包。）
MainViewController(食物菜单列表)
import UIKit
class MainViewController: UIViewController, UITableViewDataSource, UITableViewDelegate,
UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout
@IBOutlet weak var searchBar: UISearchBar!
@IBOutlet weak var mainTableView: UITableView!
var imageNames = [ImageNames]()
var searchFoods: [String]!
var priceFood: [Double]!
var searching = false
override func viewWillAppear(_ animated: Bool)
super.viewWillAppear(animated)
self.tabBarController?.tabBar.isHidden = false
override func viewDidLoad()
super.viewDidLoad()
self.navigationController?.navigationBar.isHidden = true
let foodCell = Food(name: ["Hamburger big mac",
"Patates",
"Whopper",
"Steakhouse"], price: [15.0, 20.0, 25.0, 30.0])
searchBar.delegate = self
searchFoods = foodCell.name
priceFood = foodCell.price
imageNames = [
ImageNames(name: "images"),
ImageNames(name: "unnamed"),
ImageNames(name: "unnamed")
]
func numberOfSections(in tableView: UITableView) -> Int
return 2
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
return section == 0 ? 1 : searchFoods.count
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
return indexPath.section == 0 ? 130 : 65
func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat
return indexPath.section == 0 ? 100 : 65
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
if indexPath.section == 0
let cell = tableView.dequeueReusableCell(withIdentifier: "MainFoodTableViewCell", for: indexPath) as! MainFoodTableViewCell
cell.mainFoodCollectionView.delegate = self
cell.mainFoodCollectionView.dataSource = self
cell.mainFoodCollectionView.reloadData()
cell.mainFoodCollectionView.tag = indexPath.row
return cell
else
let cell = tableView.dequeueReusableCell(withIdentifier: "CellForFood", for: indexPath) as! MainFoodTitleTableViewCell
cell.titleLabel?.text = searchFoods[indexPath.row]
cell.priceLabel?.text = priceFood[indexPath.row].description
return cell
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
if segue.identifier == "cellForFoodSegue"
if let destinationViewController = segue.destination as? DetailViewController
let indexPath = self.mainTableView.indexPathForSelectedRow!
var foodNameArray: [String]
var foodPriceArray: [Double]
foodNameArray = [searchFoods[indexPath.row]]
foodPriceArray = [priceFood[indexPath.row]]
destinationViewController.detailFoodName = foodNameArray
destinationViewController.detailFoodPrice = foodPriceArray
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
return imageNames.count
//MARK:- collection view cell size
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize
let width = UIScreen.main.bounds.width
return CGSize(width: width, height: 130)
//MARK:- //collection view cell data
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "MainFoodCollectionViewCell", for: indexPath) as! MainFoodCollectionViewCell
let img = imageNames[indexPath.row]
cell.mainFoodImage.image = UIImage(named: img.name)
return cell
DetailViewController(选定的食物列表)
import UIKit
class DetailViewController: UIViewController
@IBOutlet weak var foodTitle: UILabel!
@IBOutlet weak var foodSubTitle: UILabel!
@IBOutlet weak var foodPiece: UILabel!
@IBOutlet weak var foodPrice: UILabel!
@IBOutlet weak var drinkPicker: UITextField!
@IBOutlet weak var menuPieceStepper: UIStepper!
var drinkPickerView = UIPickerView()
var selectDrinkType: [String] = []
var detailFoodName : [String] = []
var detailFoodPrice : [Double] = [0.0]
let foods = Food(name: ["Hamburger big mac",
"Patates",
"Whopper",
"Steakhouse"], price: [15.0, 20.0, 25.0, 30.0])
@IBAction func foodPieceStepper(_ sender: Any)
@objc func foodPieceChangeStepper()
let res = menuPieceStepper.value + foods.price.first!
foodPrice.text = "\(res)"
//TODO:- Add to basket
@IBAction func addBasket(_ sender: Any)
let destinationVC = MyCartViewController()
destinationVC.fromDetailFoodNames = foods.name
destinationVC.fromDetailFoodPrices = foods.price
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
if(segue.identifier == "addToCartSegue")
if let addToCartVC = segue.destination as? MyCartViewController
addToCartVC.fromDetailFoodNames = [foodTitle.text]
addToCartVC.fromDetailFoodPrices = foods.price
override func viewDidLoad()
super.viewDidLoad()
menuPieceStepper.value = 0.0
menuPieceStepper.minimumValue = 0.0
menuPieceStepper.maximumValue = 30.0
menuPieceStepper.stepValue = foods.price.first!
menuPieceStepper.addTarget(self, action: #selector(foodPieceChangeStepper), for: .valueChanged)
drinkPickerView.delegate = self
drinkPicker.inputView = drinkPickerView
selectDrinkType = ["Ayran", "Kola", "Su", "Fanta", "Şalgam", "Sprite"]
foodTitle.text = detailFoodName.description
foodPrice.text = detailFoodPrice.description
self.navigationController?.navigationItem.title = "Sipariş Detayı"
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.dismissKeyboard (_:)))
self.view.addGestureRecognizer(tapGesture)
@objc func dismissKeyboard (_ sender: UITapGestureRecognizer)
drinkPicker.resignFirstResponder()
override func viewWillAppear(_ animated: Bool)
self.navigationController?.navigationBar.isHidden = false
override func viewWillDisappear(_ animated: Bool)
self.navigationController?.navigationBar.isHidden = true
extension DetailViewController: UIPickerViewDelegate, UIPickerViewDataSource
func numberOfComponents(in pickerView: UIPickerView) -> Int
return 1
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int
return selectDrinkType.count
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String?
return selectDrinkType[row]
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)
let selectedDrink = selectDrinkType[row]
drinkPicker.text = selectedDrink
MyCartViewController（我的杂货袋）
import UIKit
class MyCartViewController: UIViewController, UITableViewDataSource, UITableViewDelegate
var fromDetailFoodNames: [String?] = []
var fromDetailFoodPrices: [Double?] = []
@IBOutlet weak var myCartTableView: UITableView!
@IBOutlet weak var totalPriceLabel: UILabel!
let foodNames = [
"Hamburger big mac",
"Cemal",
"Emre",
"Memo"
]
//TODO-: Delete my cart
@IBAction func deleteMyCart(_ sender: Any)
//TODO: - Approve my cart
@IBAction func approveCart(_ sender: Any)
override func viewDidLoad()
super.viewDidLoad()
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
return section == 0 ? 1 : foodNames.count
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = tableView.dequeueReusableCell(withIdentifier: "myCartCell", for: indexPath) as! MyCartTableViewCell
if indexPath.section == 1 && indexPath.last! <= fromDetailFoodPrices.indices.last!
let name = fromDetailFoodNames[indexPath.row]?.description ?? ""
let price = fromDetailFoodPrices[indexPath.row]
cell.myCartFoodNameLabel?.text = name
cell.myCartFoodPriceLabel?.text = "\(String(describing: price))₺"
return cell
【问题讨论】：
好的，我看到了你的流程，我有一个问题请告诉我，有没有关于详细 ViewController 的 api 用于发送数据？如果不创建字典 [String:Any] 将所有数据添加到字典 [keys : value] 中，将字典保存在用户默认的 sepete ekle 按钮上，当您在购物车视图控制器上时，获取您的字典并附加到数组 [[String:任何]] on viewdidload.... @sukhwinder-singh 不，我只是使用虚拟数据来确定我是否可以通过 3 个视图传递数据。如果我在 Detail VC 上创建字典，它将是在 DetailVC 上创建的独立数据吗？因此，这与来自 MainVC 的数据无关。 【参考方案1】：// Create Custom delegate for him
// eg:- On PopUp View Controller
// Create protocol
protocol PopUpVCDelegate: class
func refresh(text: String)
// declare delegate var
weak var delegate:PopUpVCDelegate?
// puting value on it
self.delegate?.refresh(text: self.mDateTxtFld.text!)
// On Main ViewController (Recieving Data Class)
extension MainViewController: PopUpVCDelegate
func refresh(text: String)
self.dateLbl.text = text
// and don't forget to call or connect delegate when you present or push popup Vc
//like
let resultController = self.storyboard?.instantiateViewController(withIdentifier: "PopUpVCID") as? PopUpVC
resultController?.delegate = self
self.present(resultController!, animated: true, completion: nil)
// Hope Its work for you!
【讨论】：
我用协议和委托尝试了 2 次，但没有得到任何结果。您能否将您的示例与我的确切课程一起使用？我正在使用 MainViewController，这是我在那里的第一个数据。其次是来自 MainViewController 的 DetailViewController。第三个也是最重要的视图是 MyCartViewController。 但是你有 3 个 ViewController。我不知道你的 viewController 流程，如果可能请描述一下？ 我在问题中添加了图片以上是关于如何从弹出视图控制器获取数据到自定义表格视图单元格？的主要内容，如果未能解决你的问题，请参考以下文章