ios - Swift 3.1 UITableViewController 作为 subview 或弹出窗口
<p><p>我有一个棘手的任务。我有带有两个 tableView、按钮等的 TableUIViewController(父 UIViewController)。此 UIViewController 显示有关咖啡馆中表的信息。 </p>
<p>我还有另一个名为 MenuTableViewController 的 Controller (父级是 UITableViewController)，它是显示菜单项列表的单独 View 。只有三个 UI 项 - 每个单元格中有两个标签和按钮。</p>
<p>想法:
我想以两种不同的方式使用这个 MenuTableViewController。</p>
<ol>
<li><p>如果从主菜单执行到此 View 的 segue - 只需显示菜单并允许用户编辑每个单元格。 Button.title = "打开"。</p></li>
<li><p>如果 View 是从 TableUIViewController 打开的 - 将按钮标题更改为“选择”，如果按下按钮以创建订单等，则返回到 MenuTableViewController。</p></li>
</ol>
<p>我发现执行 segue + prepare for segue 对我有用，但如果我使用 segue，我会遇到导航 Controller 的问题 - 我完全失去了“返回”按钮并且无法返回主菜单。 </p>
<p>所以我认为我可以使用 AddSubView 或一些弹出窗口执行以下步骤:</p>
<ol>
<li><p>TableUIViewController 中的点击按钮</p></li>
<li><p>显示 MenuTableViewController</p></li>
<li><p>点击某个按钮</p></li>
<li><p>返回到 TableUIViewController - 理想情况下无需重新初始化，以保留所有变量的值。</p></li>
</ol>
<p>但我不明白如何在这里使用 AddSubview。有人可以指导我吗？或者提供一些例子。没发现什么好东西。</p>
<p>这是我的类(class):</p>
<p><strong>TableUIViewController</strong></p>
<pre><code>import UIKit
import CoreData
class TableUIViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, GuestAtTableTableViewCellDelegate, OrderInTableTableViewCellDelegate {
//MARK: variables:
//The following three variables will be set before segue to this view.
fileprivate let myGenericFunctions = MyGenericFunctions()
var tableName: String? = nil
var currentTable: TablesTable? = nil
var currentTableSession: TableSessionTable? = nil
let tableSessionTable = TableSessionTable()
let guestsTable = GuestsTable()
fileprivate var countOfGuests: Int {
get {
guard currentTableSession != nil else {return 0}
return guestsTable.getActiveGuestsForTable(tableSession: currentTableSession!)!.count
}
}
fileprivate var guestsTableFetchedResultsController: NSFetchedResultsController<GuestsTable>?
fileprivate var ordersTableFetchedResultsController: NSFetchedResultsController<OrdersTable>?
//MARK: IBOutlets
@IBOutlet weak var tableCapacityLabel: UILabel!
@IBOutlet weak var tableCountOfGuestsLabel: UILabel!
@IBOutlet weak var tableOpenTimeLabel: UILabel!
@IBOutlet weak var tableDescriptionTextView: UITextView!
@IBAction func closeTableButtonPressed(_ sender: UIButton) {
guard currentTableSession != nil else {return}
guestsTable.removeAllGuestsForTable(tableSession: currentTableSession!)
updateGuestsTableView()
updateOrdersTableView()
tableSessionTable.removeTableSession(tableSession: currentTableSession!)
currentTableSession = nil
updateLabels()
}
@IBOutlet weak var guestsTableView: UITableView!
@IBOutlet weak var ordersTableView: UITableView!
@IBAction func addGuestButtonPressed(_ sender: UIButton) {
if currentTableSession == nil {
currentTableSession = tableSessionTable.createTableSession(table: currentTable!)
}
if let capacity = Int(tableCapacityLabel.text!) {
guard capacity > countOfGuests else {return}
}
let guestsTable = GuestsTable()
guestsTable.addNewGuest(tableSession: currentTableSession!)
updateGuestsTableView()
updateLabels()
}
@IBAction func addOrderButtonPressed(_ sender: UIButton) {
guard currentTableSession != nil else {return}
}
//MARK: functions:
override func viewDidLoad() {
super.viewDidLoad()
guestsTableView.dataSource = self
guestsTableView.delegate = self
ordersTableView.dataSource = self
ordersTableView.delegate = self
updateGuestsTableView()
updateLabels()
}
private func updateLabels() {
tableCapacityLabel.text = String(describing: currentTable!.tableCapacity)
tableCountOfGuestsLabel.text = String(describing: countOfGuests)
if currentTableSession != nil {
tableOpenTimeLabel.text = String(describing: myGenericFunctions.convertDate(inputDate: currentTableSession!.openTime!))
} else {
tableOpenTimeLabel.text = " - "
}
if currentTable!.tableDescription != nil {
tableDescriptionTextView.text = currentTable!.tableDescription
}
}
//MARK: Delegates of cell buttons
func didPressGuestCellButton(guest: GuestsTable) {
guestsTable.closeGuest(guest: guest)
updateLabels()
updateGuestsTableView()
}
func didPressOrderCellButton(order: OrdersTable) {
}
//MARK: Functions for tableViews update
private func updateGuestsTableView () {
guard currentTableSession != nil else {return}
let tableView = guestsTableView
let context = AppDelegate.viewContext
let request : NSFetchRequest<GuestsTable> = GuestsTable.fetchRequest()
request.predicate = NSPredicate(format: "table= %@", currentTableSession!)
request.sortDescriptors =
guestsTableFetchedResultsController = NSFetchedResultsController<GuestsTable>(fetchRequest: request, managedObjectContext: context, sectionNameKeyPath: nil, cacheName: nil)
try? guestsTableFetchedResultsController?.performFetch()
tableView?.reloadData()
}
private func updateOrdersTableView () {
let tableView = ordersTableView
let context = AppDelegate.viewContext
let request : NSFetchRequest<OrdersTable> = OrdersTable.fetchRequest()
request.sortDescriptors =
ordersTableFetchedResultsController = NSFetchedResultsController<OrdersTable>(fetchRequest: request, managedObjectContext: context, sectionNameKeyPath: nil, cacheName: nil)
try? ordersTableFetchedResultsController?.performFetch()
tableView?.reloadData()
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if tableView == self.guestsTableView {
let cell = tableView.dequeueReusableCell(withIdentifier: "guestCell", for: indexPath) as! GuestAtTableTableViewCell
if let guest = guestsTableFetchedResultsController?.object(at: indexPath) {
cell.guestNameLabel.text = guest.guestName
cell.openTimeLabel.text = "Пришел: " + myGenericFunctions.convertDate(inputDate: guest.openTime!)
if let closeTime = guest.closeTime {
cell.closeTimeLabel.text = "Ушел: " + myGenericFunctions.convertDate(inputDate: closeTime)
cell.closeGuestButton.isEnabled = false
cell.guestNameLabel.textColor = UIColor.darkGray
cell.openTimeLabel.textColor = UIColor.darkGray
cell.closeTimeLabel.textColor = UIColor.darkGray
}
cell.cellDelegate = self
cell.guest = guest
}
return cell
}
else {
let cell = tableView.dequeueReusableCell(withIdentifier: "orderCell", for: indexPath)
return cell
}
}
func numberOfSections(in tableView: UITableView) -> Int {
if tableView == self.guestsTableView {
return guestsTableFetchedResultsController?.sections?.count ?? 1
}
else if tableView == self.ordersTableView {
return ordersTableFetchedResultsController?.sections?.count ?? 1
}
else {return 1}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if tableView == self.guestsTableView {
if let sections = guestsTableFetchedResultsController?.sections, sections.count > 0 {
return sections.numberOfObjects
}
else {
return 0
}
}
else if tableView == self.ordersTableView {
if let sections = ordersTableFetchedResultsController?.sections, sections.count > 0 {
return sections.numberOfObjects
}
else {
return 0
}
}
else {return 0}
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
if tableView == self.guestsTableView {
if let sections = guestsTableFetchedResultsController?.sections, sections.count > 0 {
return sections.name
}
else {
return nil
}
}
else if tableView == self.ordersTableView {
if let sections = ordersTableFetchedResultsController?.sections, sections.count > 0 {
return sections.name
}
else {
return nil
}
}
else {return nil}
}
func sectionIndexTitles(for tableView: UITableView) -> ? {
if tableView == guestsTableView {
return guestsTableFetchedResultsController?.sectionIndexTitles
}
else {
return ordersTableFetchedResultsController?.sectionIndexTitles
}
}
func tableView(_ tableView: UITableView, sectionForSectionIndexTitle title: String, at index: Int) -> Int {
if tableView == guestsTableView {
return guestsTableFetchedResultsController?.section(forSectionIndexTitle: title, at: index) ?? 0
}
else if tableView == ordersTableView {
return ordersTableFetchedResultsController?.section(forSectionIndexTitle: title, at: index) ?? 0
}
else {return 0}
}
//Prepare for segues
/*override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "openMenuToAddOrder" {
if let menuTVC = segue.destination as? MenuTableViewController {
menuTVC.isOpenedFromTable = true
menuTVC.currentTableSession = currentTableSession
menuTVC.currentTable = currentTable
}
}
}*/
}
</code></pre>
<p><strong>ManuTableViewController:</strong></p>
<pre><code>class MenuTableViewController: FetchedResultsTableViewController, MenuTableViewCellDelegate {
var tableName: String? = nil
var currentTable: TablesTable? = nil
var currentTableSession: TableSessionTable? = nil
var isOpenedFromTable: Bool = false
let ordersTable = OrdersTable()
fileprivate var fetchedResultsController: NSFetchedResultsController<MenuTable>?
override func viewDidLoad() {
updateMenuTableView()
self.navigationItem.rightBarButtonItem = self.editButtonItem
}
//MARK: delegate of table cell
func didPressMenuItemCellButton (menuItem: MenuTable) {
if isOpenedFromTable {
ordersTable.addOrUpdateOrderForTableSession(tableSession: currentTableSession!, menuItem: menuItem)
performSegue(withIdentifier: "returnToTableView", sender: self)
} else {
//here will be code for editing menu item
}
}
//MARK: Functioms for table view update
private func updateMenuTableView () {
let context = AppDelegate.viewContext
let request : NSFetchRequest<MenuTable> = MenuTable.fetchRequest()
request.sortDescriptors =
fetchedResultsController = NSFetchedResultsController<MenuTable>(fetchRequest: request, managedObjectContext: context, sectionNameKeyPath: nil, cacheName: nil)
fetchedResultsController?.delegate = self
try? fetchedResultsController?.performFetch()
tableView.reloadData()
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "menuCell", for: indexPath) as! MenuTableViewCell
if let menuTable = fetchedResultsController?.object(at: indexPath) {
cell.menuItemNameLabel.text = menuTable.itemName
cell.menuItemDescriptionLabel.text = menuTable.itemDescription
cell.menuItemPriceLabel.text = String(describing: menuTable.itemPrice)
if isOpenedFromTable == true {
cell.button.setTitle("Выбрать", for: UIControlState.normal)
} else {
cell.button.setTitle("Открыть", for: UIControlState.normal)
}
cell.menuItem = menuTable
cell.cellDelegate = self
}
return cell
}
//Prepare for segues
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "returnToTableView" {
if let tableTVC = segue.destination as? TableUIViewController {
tableTVC.currentTableSession = currentTableSession
tableTVC.currentTable = currentTable
tableTVC.tableName = currentTable?.tableName
}
}
}
}
extension MenuTableViewController {
override func numberOfSections(in tableView: UITableView) -> Int {
return fetchedResultsController?.sections?.count ?? 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if let sections = fetchedResultsController?.sections, sections.count > 0 {
return sections.numberOfObjects
}
else {
return 0
}
}
override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
if let sections = fetchedResultsController?.sections, sections.count > 0 {
return sections.name
}
else {
return nil
}
}
override func sectionIndexTitles(for tableView: UITableView) -> ? {
return fetchedResultsController?.sectionIndexTitles
}
override func tableView(_ tableView: UITableView, sectionForSectionIndexTitle title: String, at index: Int) -> Int {
return fetchedResultsController?.section(forSectionIndexTitle: title, at: index) ?? 0
}
}
</code></pre>
<p><strong>更新:</strong>
这是我的 Storyboard。我感觉我没有正确使用导航 Controller 。但是在 View 之间没有一些 Controller- 后退按钮不会出现。并对图像中的俄语文本感到抱歉。
<a href="/image/Ok67Q.jpg" rel="noreferrer noopener nofollow"><img src="/image/Ok67Q.jpg" alt="enter image description here"/></a> </p>
<p><strong>标记为已解决后更新:</strong></p>
<p>我删除了 performSegue 并将 Controller 中的 segues 放到按钮本身。现在导航 Controller 保持返回按钮应有的状态。
还将更新 UI 功能移动到 viewWillAppear 以在 segues 后保持表格更新。</p>
<pre><code>override func viewWillAppear(_ animated: Bool) {
updateGuestsTableView()
updateOrdersTableView()
updateLabels()
updateOrdersTableView()
}
</code></pre>
<p>另一个更新，现在它完全可以按照我的意愿运行。
我已添加到由 Menu Cell Button 调用的函数以返回到先前的 ViewController(与 Back 按钮相同):</p>
<pre><code> //MARK: delegate of table cell
func didPressMenuItemCellButton (menuItem: MenuTable) {
if isOpenedFromTable {
ordersTable.addOrUpdateOrderForTableSession(tableSession: currentTableSession!,
menuItem: menuItem)
_ = navigationController?.popViewController(animated: true)
} else {
//here will be code for editing menu item
}
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>听起来你想要这样的结构:</p>
<p> <a href="/image/AObIk.png" rel="noreferrer noopener nofollow"><img src="/image/AObIk.png" alt="enter image description here"/></a> </p>
<p>如果您从主菜单中选择“编辑食物菜单”，您将直接进入“食物菜单”。如果您选择“接受订单”，您将看到“表格列表”。</p>
<p>如果您选择“编辑食物菜单”，那么您的食物菜单代码应显示“编辑”作为表格中每一行的按钮标题。点击“编辑”将带您进入“编辑菜单项” View 。</p>
<p>如果您选择“接受订单”，然后从列表中选择一个表，<em>也会</em>将您带到“食物菜单”，但在这种情况下，您的食物菜单代码应显示“订单” "作为按钮标题。点击“订购”会将该食品添加到您的数据结构中，或者可能会显示确认警报，或者在此时执行任何其他需要的操作。</p>
<p>因为所有 View 都是同一个导航 Controller 结构的一部分，所以您将始终能够通过选择导航栏上的标准“<返回”按钮来“返回堆栈”。</p>
<p>希望这有点道理:)</p></p>
<p style="font-size: 20px;">关于ios - Swift 3.1 UITableViewController 作为 subview 或弹出窗口，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/44309653/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/44309653/
</a>
</p>
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