我有 2 个 ViewControllers,每个 ViewController 都有一个 UITableView。
在 MainViewController 中,我有几行,我想为每一行添加来自第二个 ViewController 的不同标签。
我的标签保存在字典中(我不知道这是否是最好的方法,但我在想也许我会避免使用字典而不是数组来两次附加标签)。
问题是我没有正确附加选定的标签,我不知道该怎么做。
我在这里创建了一个反射(reflect)我的问题的小项目:https://github.com/tygruletz/AppendTagsToCells
这是主要 VC 的代码:
class ChecklistVC: UIViewController {
@IBOutlet weak var questionsTableView: UITableView!
//Properties
lazy var itemSections: [ChecklistItemSection] = {
return ChecklistItemSection.checklistItemSections()
}()
var lastIndexPath: IndexPath!
var selectedIndexPath: IndexPath!
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
questionsTableView.reloadData()
}
}
extension ChecklistVC: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let itemCategory = itemSections[section]
return itemCategory.checklistItems.count
}
func numberOfSections(in tableView: UITableView) -> Int {
return itemSections.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "checklistCell", for: indexPath) as! ChecklistCell
let itemCategory = itemSections[indexPath.section]
let item = itemCategory.checklistItems[indexPath.row]
cell.delegate = self
cell.configCell(item)
cell.vehicleCommentLabel.text = item.vehicleComment
cell.trailerCommentLabel.text = item.trailerComment
cell.tagNameLabel.text = item.vehicleTags[indexPath.row]?.name
return cell
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goChecklistAddComment" {
let addCommentVC = segue.destination as! ChecklistAddCommentVC
addCommentVC.delegate = self
}
if segue.identifier == "goChecklistAddTag" {
let checklistAddTag = segue.destination as! ChecklistAddTagVC
checklistAddTag.indexForSelectedRow = self.selectedIndexPath
checklistAddTag.tagsCallback = { result in
print("result: \(result)")
let item = self.itemSections[self.lastIndexPath.section].checklistItems[self.lastIndexPath.row]
item.vehicleTags = result
}
}
}
}
这是标签 ViewController 的代码:
class ChecklistAddTagVC: UIViewController {
// Interface Links
@IBOutlet weak var tagsTitleLabel: UILabel!
@IBOutlet weak var tagsTableView: UITableView!
// Properties
var tagsDictionary: [Int: Tag] = [:]
var tagsAdded: [Int:Tag] = [:]
var tagsCallback: (([Int:Tag]) -> ())?
var indexForSelectedRow: IndexPath!
override func viewDidLoad() {
super.viewDidLoad()
tagsTableView.tableFooterView = UIView()
tagsDictionary = [
1: Tag(remoteID: 1, categoryID: 1, name: "Tag1", colour: "red"),
2: Tag(remoteID: 2, categoryID: 1, name: "Tag2", colour: "blue"),
3: Tag(remoteID: 3, categoryID: 1, name: "Tag3", colour: "orange"),
4: Tag(remoteID: 4, categoryID: 1, name: "Tag4", colour: "black")
]
print("Received index for SelectedRow: \(indexForSelectedRow ?? IndexPath())")
}
}
extension ChecklistAddTagVC: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return tagsDictionary.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "defectAndDamageTagCell", for: indexPath) as! ChecklistAddTagCell
cell.configCell()
cell.delegate = self
cell.tagNameLabel.text = tagsDictionary[indexPath.row + 1]?.name.capitalized
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 60
}
}
extension ChecklistAddTagVC: ChecklistAddTagCellDelegate{
// When the user press Add Tag then will be added in a dictionary and sent to ChecklistVC using a callback closure.
func addTagBtnPressed(button: UIButton, tagLabel: UILabel) {
if button.currentTitle == "+"{
button.setTitle("-", for: UIControl.State.normal)
tagLabel.textColor = UIColor.orange
tagsAdded = [0: Tag(remoteID: 1, categoryID: 1, name: tagLabel.text ?? String(), colour: "red")]
print(tagsAdded[0]?.name ?? String())
tagsCallback?(tagsAdded)
}
else{
button.setTitle("+", for: UIControl.State.normal)
tagLabel.textColor = UIColor.black
tagsAdded.removeValue(forKey: 0)
print(tagsAdded)
tagsCallback?(tagsAdded)
}
}
}
这是我的问题的截图:
感谢您阅读本文!
最佳答案
我修好了!
解决方案如下。您也可以在此链接中找到已完成的项目: https://github.com/tygruletz/AppendCommentsToCells
主VC:
class ChecklistVC: UIViewController {
@IBOutlet weak var questionsTableView: UITableView!
//Properties
lazy var itemSections: [ChecklistItemSection] = {
return ChecklistItemSection.checklistItemSections()
}()
var lastIndexPath: IndexPath!
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
questionsTableView.reloadData()
}
}
extension ChecklistVC: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let itemCategory = itemSections[section]
return itemCategory.checklistItems.count
}
func numberOfSections(in tableView: UITableView) -> Int {
return itemSections.count
}
// Set the header of each section
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
let checklistItemCategory = itemSections[section]
return checklistItemCategory.name.uppercased()
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "checklistCell", for: indexPath) as! ChecklistCell
let itemCategory = itemSections[indexPath.section]
let item = itemCategory.checklistItems[indexPath.row]
cell.delegate = self
cell.configCell(item)
cell.vehicleCommentLabel.text = item.vehicleComment
cell.trailerCommentLabel.text = item.trailerComment
let sortedTagNames = item.vehicleTags.keys.sorted(by: {$0 < $1}).compactMap({ item.vehicleTags[$0]})
print("Sorted tag names: \(sortedTagNames.map {$0.name})")
let joinedTagNames = sortedTagNames.map { $0.name}.joined(separator: ", ")
cell.tagNameLabel.text = joinedTagNames
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 150
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goChecklistAddComment" {
let addCommentVC = segue.destination as! ChecklistAddCommentVC
addCommentVC.delegate = self
}
if segue.identifier == "goChecklistAddTag" {
let addTagVC = segue.destination as! ChecklistAddTagVC
addTagVC.delegate = self
addTagVC.addedTags = itemSections[lastIndexPath.section].checklistItems[lastIndexPath.row].vehicleTags
}
}
}
extension ChecklistVC: ChecklistCellDelegate {
func tapGestureOnCell(_ cell: ChecklistCell) {
showOptionsOnCellTapped(questionsTableView.indexPath(for: cell)!)
}
func showOptionsOnCellTapped(_ indexPath: IndexPath){
let addComment = UIAlertAction(title: "? Add Comment", style: .default) { action in
self.lastIndexPath = indexPath
self.performSegue(withIdentifier: "goChecklistAddComment", sender: nil)
}
let addTag = UIAlertAction(title: "? Add Tag ⤵", style: .default) { action in
self.showOptionsForAddTag(indexPath)
}
let actionSheet = configureActionSheet()
actionSheet.addAction(addComment)
actionSheet.addAction(addTag)
self.present(actionSheet, animated: true, completion: nil)
}
// A menu from where the user can choose to add tags for Vehicle or Trailer
func showOptionsForAddTag(_ indexPath: IndexPath){
self.lastIndexPath = indexPath
let addVehicleTag = UIAlertAction(title: "Add Vehicle tag", style: .default) { action in
self.performSegue(withIdentifier: "goChecklistAddTag", sender: nil)
}
let addTrailerTag = UIAlertAction(title: "Add Trailer tag", style: .default) { action in
self.performSegue(withIdentifier: "goChecklistAddTag", sender: nil)
}
let actionSheet = configureActionSheet()
actionSheet.addAction(addVehicleTag)
actionSheet.addAction(addTrailerTag)
self.present(actionSheet, animated: true, completion: nil)
}
func configureActionSheet() -> UIAlertController {
let actionSheet = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
let cancel = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
actionSheet.addAction(cancel)
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiom.pad ){
actionSheet.popoverPresentationController?.sourceView = self.view
actionSheet.popoverPresentationController?.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 0, height: 0)
actionSheet.popoverPresentationController?.permittedArrowDirections = []
}
return actionSheet
}
}
// Receive Comments from ChecklistAddCommentVC using the Delegate Pattern
extension ChecklistVC: ChecklistAddCommentDelegate {
func receiveVehicleComment(vehicleComment: String?, trailerComment: String?) {
let item = itemSections[lastIndexPath.section].checklistItems[lastIndexPath.row]
item.vehicleComment = vehicleComment ?? String()
item.trailerComment = trailerComment ?? String()
questionsTableView.reloadData()
}
}
// Receive Tags from ChecklistAddTagVC using the Delegate Pattern
extension ChecklistVC: ChecklistAddTagVCDelegate{
func receiveAddedTags(tags: [Int : Tag]) {
let item = self.itemSections[self.lastIndexPath.section].checklistItems[self.lastIndexPath.row]
item.vehicleTags = tags
}
}
添加标签VC:
protocol ChecklistAddTagVCDelegate {
func receiveAddedTags(tags: [Int: Tag])
}
class ChecklistAddTagVC: UIViewController {
// Interface Links
@IBOutlet weak var tagsTableView: UITableView!
// Properties
var tagsDictionary: [Int: Tag] = [:]
var addedTags: [Int: Tag] = [:]
var delegate: ChecklistAddTagVCDelegate?
var indexPathForBtn: IndexPath!
override func viewDidLoad() {
super.viewDidLoad()
tagsTableView.tableFooterView = UIView()
tagsDictionary = [
1: Tag(remoteID: 1, categoryID: 1, name: "Tag1", color: "red"),
2: Tag(remoteID: 2, categoryID: 1, name: "Tag2", color: "blue"),
3: Tag(remoteID: 3, categoryID: 1, name: "Tag3", color: "orange"),
4: Tag(remoteID: 4, categoryID: 1, name: "Tag4", color: "black")
]
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
print("Added tags: \(addedTags.map {$1.name})")
setupButtons()
tagsTableView.reloadData()
}
}
extension ChecklistAddTagVC: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return tagsDictionary.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "defectAndDamageTagCell", for: indexPath) as! ChecklistAddTagCell
cell.configCell()
cell.delegate = self
cell.tagNameLabel.text = tagsDictionary[indexPath.row + 1]?.name.capitalized
indexPathForBtn = indexPath
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 60
}
}
extension ChecklistAddTagVC: ChecklistAddTagCellDelegate{
// When the user press Add Tag then will be added in a dictionary and sent to ChecklistVC using a callback closure.
func addTagBtnPressed(button: UIButton, tagLabel: UILabel) {
let buttonPosition: CGPoint = button.convert(CGPoint.zero, to: tagsTableView)
let indexPath = tagsTableView.indexPathForRow(at: buttonPosition)
let indexPathForBtn: Int = indexPath?.row ?? 0
let tag: Tag = tagsDictionary[indexPathForBtn + 1] ?? Tag(remoteID: 0, categoryID: 0, name: String(), color: String())
if button.currentTitle == "+"{
button.setTitle("-", for: UIControl.State.normal)
tagLabel.textColor = UIColor.orange
// Add selected tag to Dictionary when the user press +
addedTags[tag.remoteID] = tag
}
else{
button.setTitle("+", for: UIControl.State.normal)
tagLabel.textColor = UIColor.black
// Delete selected tag from Dictionary when the user press -
addedTags.removeValue(forKey: tag.remoteID)
}
// Send the Dictionary to ChecklistVC
if delegate != nil{
delegate?.receiveAddedTags(tags: addedTags)
}
print("\n ****** UPDATED DICTIONARY ******")
print(addedTags.map {"key: \($1.remoteID) - name: \($1.name)"})
}
// Setup the state of the buttons and also the color of the buttons to be orange if that Tag exist in `addedTags` dictionary.
func setupButtons(){
for eachAddedTag in addedTags {
if eachAddedTag.value.remoteID == tagsDictionary[1]?.remoteID {
print(eachAddedTag)
}
}
}
}
现在是这样的:
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