我有一个名为yearOne
的CollectionViewController,它看起来像这样:
当您单击每个四分之一单元格的添加按钮时,会将您引至SearchPage
:
我使用委派将在SearchPage
上单击的数据附加到yearOne
当我尝试打印(vc.data)时,委托似乎正常工作,并且似乎追加了数据,但是当通过yearOne
返回到navigationController?.popViewController(animated: true)
viewcontroller时,它似乎没有显示在tableView上吗? >
import UIKit class yearOne: UICollectionViewController, coursesDelegate { let customCellIdentifier = "cellID" let customCellIdentifier2 = "cellID2" let customCellIdentifier3 = "cellID3" let customCellIdentifier4 = "cellID4" let quarters = [ customLabel (title: "Fall Quarter"), customLabel (title: "Winter Quarter"), customLabel (title: "Spring Quarter"), customLabel (title: "Summer Quarter") ] let vc = fallQuarterCell() let vc2 = winterQuarterCell() let vc3 = springQuarterCell() let vc4 = summerQuarterCell() func sendDataBackFall(data: String) { vc.data.append(data) print(vc.data) //UserDefaults.standard.set(vc.data, forKey: "SavedArray") } func sendDataBackWinter(data2: String) { vc2.data.append(data2) } func sendDataBackSpring(data3: String) { vc3.data.append(data3) } func sendDataBackSummer(data4: String) { vc4.data.append(data4) } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) vc.tableView.reloadData() collectionView.reloadData() } override func viewDidLoad() { super.viewDidLoad() collectionView.dataSource = self collectionView.delegate = self self.collectionView!.register(fallQuarterCell.self, forCellWithReuseIdentifier: customCellIdentifier)// self.collectionView!.register(winterQuarterCell.self, forCellWithReuseIdentifier: customCellIdentifier2) self.collectionView!.register(springQuarterCell.self, forCellWithReuseIdentifier: customCellIdentifier3) self.collectionView!.register(summerQuarterCell.self, forCellWithReuseIdentifier: customCellIdentifier4) navigationItem.title = "Year One" navigationController?.navigationBar.prefersLargeTitles = true collectionView?.backgroundColor = .lightGray } override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { return quarters.count } override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { if (indexPath.row == 0){ let cell1 = collectionView.dequeueReusableCell(withReuseIdentifier: customCellIdentifier, for: indexPath) as! fallQuarterCell cell1.layer.borderColor = UIColor.orange.cgColor cell1.layer.borderWidth = 2 cell1.layer.cornerRadius = 5 cell1.quarters = self.quarters[0] return cell1 } else if (indexPath.row == 1){ let cell2 = collectionView.dequeueReusableCell(withReuseIdentifier: customCellIdentifier2, for: indexPath) as! winterQuarterCell cell2.layer.borderColor = UIColor.blue.cgColor cell2.layer.borderWidth = 2 cell2.layer.cornerRadius = 5 cell2.quarters = self.quarters[1] return cell2 } else if (indexPath.row == 2){ let cell3 = collectionView.dequeueReusableCell(withReuseIdentifier: customCellIdentifier3, for: indexPath) as! springQuarterCell cell3.layer.borderColor = UIColor.green.cgColor cell3.layer.borderWidth = 2 cell3.layer.cornerRadius = 5 cell3.quarters = self.quarters[2] return cell3 } else if (indexPath.row == 3){ let cell4 = collectionView.dequeueReusableCell(withReuseIdentifier: customCellIdentifier4, for: indexPath) as! summerQuarterCell cell4.layer.borderColor = UIColor.red.cgColor cell4.layer.cornerRadius = 5 cell4.quarters = self.quarters[3] return cell4 } else{ return UICollectionViewCell() } } @objc func buttonAction(sender: UIButton!) { switch sender.tag { case 0: let destination = SearchPage() destination.delegate = self destination.tag = sender.tag navigationController?.pushViewController(destination, animated: true) case 1: let destination = SearchPage() destination.delegate = self destination.tag = sender.tag navigationController?.pushViewController(destination, animated: true) case 2: let destination = SearchPage() destination.delegate = self destination.tag = sender.tag navigationController?.pushViewController(destination, animated: true) case 3: let destination = SearchPage() destination.delegate = self destination.tag = sender.tag navigationController?.pushViewController(destination, animated: true) default: let destination = SearchPage() destination.delegate = self destination.tag = sender.tag navigationController?.pushViewController(destination, animated: true) } } } extension yearOne : UICollectionViewDelegateFlowLayout{ func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { let width = (view.frame.width - 30) return CGSize(width: width, height: 200) } func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat { return 8 } func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat { return 1 } func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets { UIEdgeInsets(top: 30, left: 10, bottom: 30, right: 10) } } class fallQuarterCell: UICollectionViewCell, UITableViewDelegate, UITableViewDataSource { //var data = UserDefaults.standard.object(forKey: "SavedArray") as? [String] ?? [String]() var data : [String] = [] // func load(){ // if let loadeddata: [String] = UserDefaults.standard.object(forKey: "SavedArray") as? [String] { // data = loadeddata // tableView.reloadData() // } // } let cellId = "coursesName" let tableView:UITableView = { let tableView = UITableView() tableView.translatesAutoresizingMaskIntoConstraints = false tableView.backgroundColor = UIColor.white return tableView }() override init(frame: CGRect){ super.init(frame: frame) addSubview(tableView) setupView() } func setupView(){ tableView.register(UITableViewCell.self, forCellReuseIdentifier: cellId) tableView.delegate = self tableView.dataSource = self self.backgroundColor = UIColor.white contentView.addSubview(quarterLabel) contentView.addSubview(addButton) quarterLabel.translatesAutoresizingMaskIntoConstraints = false quarterLabel.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 10).isActive = true quarterLabel.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 10).isActive = true addButton.translatesAutoresizingMaskIntoConstraints = false addButton.topAnchor.constraint(equalTo: quarterLabel.topAnchor, constant: -5).isActive = true addButton.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: -10).isActive = true addButton.heightAnchor.constraint(equalToConstant: 25).isActive = true addButton.widthAnchor.constraint(equalToConstant: 25).isActive = true tableView.translatesAutoresizingMaskIntoConstraints = false tableView.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 35).isActive = true tableView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 5).isActive = true tableView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: -10).isActive = true tableView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor, constant: -5).isActive = true } func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return data.count } func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath) cell.textLabel?.text = data[indexPath.row] return cell } func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { return 40 } func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool { return true } func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) { if (editingStyle == .delete) { if (indexPath.row == 0){ data.remove(at: 0) //UserDefaults.standard.set(data, forKey: "SavedArray") self.tableView.reloadData() } else if (indexPath.row == 1){ data.remove(at: 1) //UserDefaults.standard.set(data, forKey: "SavedArray") self.tableView.reloadData() } else if (indexPath.row == 2){ data.remove(at: 2) //UserDefaults.standard.set(data, forKey: "SavedArray") self.tableView.reloadData() } else if (indexPath.row == 3){ data.remove(at: 3) //UserDefaults.standard.set(data, forKey: "SavedArray") self.tableView.reloadData() } else if (indexPath.row == 4){ data.remove(at: 4) //UserDefaults.standard.set(data, forKey: "SavedArray") self.tableView.reloadData() } } } func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { //add class information??? } var quarters: customLabel? { didSet { guard let quarters = quarters else {return} quarterLabel.text = quarters.title } } let quarterLabel : UILabel = { let label = UILabel()//frame: CGRect(x: 15, y: -75, width: 300, height: 50)) label.translatesAutoresizingMaskIntoConstraints = false label.textColor = UIColor.black label.font = UIFont.boldSystemFont(ofSize: 16) //label.textAlignment = .center return label }() let addButton : UIButton = { let button = UIButton()//frame: CGRect(x: 345, y: 10, width: 30, height: 30)) button.setImage(UIImage(named: "addicon"), for: .normal) button.imageEdgeInsets = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5) button.tag = 0 button.addTarget(self, action: #selector(yearOne.buttonAction), for: .touchUpInside) return button }() required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } }
我也有
class winterQuarterCell: UICollectionViewCell, UITableViewDelegate, UITableViewDataSource
class springQuarterCell: UICollectionViewCell, UITableViewDelegate, UITableViewDataSource
class summerQuarterCell: UICollectionViewCell, UITableViewDelegate, UITableViewDataSource
类似于fallQuarterCell,但排除了它。
import UIKit protocol coursesDelegate { func sendDataBackFall(data: String) func sendDataBackWinter(data2: String) func sendDataBackSpring(data3: String) func sendDataBackSummer(data4: String) } class SearchPage: UITableViewController { var delegate: coursesDelegate? let cellId = "course" var allCourses : NSArray = NSArray() var filteredCourses = [String]() var resultSearchController = UISearchController() var tag: Int? let vc = fallQuarterCell() let vc2 = winterQuarterCell() let vc3 = springQuarterCell() let vc4 = summerQuarterCell() override func viewDidLoad() { super.viewDidLoad() let courses : CourseList = CourseList() allCourses = courses.coursesList navigationItem.title = "Select Courses" navigationController?.navigationBar.prefersLargeTitles = true //let button1 = UIBarButtonItem(title: "Add Course", style: .plain, target: self, action: #selector(addTapped)) //self.navigationItem.rightBarButtonItem = button1 self.view.backgroundColor = .systemBackground tableView.register(UITableViewCell.self, forCellReuseIdentifier: cellId) tableView.delegate = self tableView.dataSource = self self.tableView.tableFooterView = UIView() resultSearchController = ({ let controller = UISearchController(searchResultsController: nil) controller.searchResultsUpdater = self controller.obscuresBackgroundDuringPresentation = false controller.searchBar.placeholder = "Search Courses" controller.searchBar.sizeToFit() tableView.tableHeaderView = controller.searchBar return controller })() } override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { if (resultSearchController.isActive) { return filteredCourses.count } else{ return allCourses.count } } override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath) if (resultSearchController.isActive) { cell.textLabel?.text = filteredCourses[indexPath.row] return cell } else { let courses = self.allCourses[indexPath.row] cell.textLabel?.text = courses as? String return cell } } override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){ tableView.deselectRow(at: indexPath, animated: true) if (tag == 0){ if (resultSearchController.isActive){ // vc.data.append(filteredCourses[indexPath.row]) // UserDefaults.standard.set(vc.data, forKey: "SavedArray") // self.navigationController?.popViewController(animated: true) let data = filteredCourses[indexPath.row] delegate?.sendDataBackFall(data: data) self.navigationController?.popViewController(animated: true) } else{ // vc.data.append(allCourses[indexPath.row] as! String) // UserDefaults.standard.set(vc.data, forKey: "SavedArray") // self.navigationController?.popViewController(animated: true) let data = allCourses[indexPath.row] as! String delegate?.sendDataBackFall(data: data) self.navigationController?.popViewController(animated: true) } } else if (tag == 1){ if (resultSearchController.isActive){ // vc2.data.append(filteredCourses[indexPath.row]) // UserDefaults.standard.set(vc2.data, forKey: "SavedArray2") // self.navigationController?.popViewController(animated: true) let data = filteredCourses[indexPath.row] delegate?.sendDataBackWinter(data2: data) self.navigationController?.popViewController(animated: true) } else{ // vc2.data.append(allCourses[indexPath.row] as! String) // UserDefaults.standard.set(vc2.data, forKey: "SavedArray2") // self.navigationController?.popViewController(animated: true) let data = allCourses[indexPath.row] as! String delegate?.sendDataBackWinter(data2: data) self.navigationController?.popViewController(animated: true) } } else if (tag == 2){ if (resultSearchController.isActive){ // vc3.data.append(filteredCourses[indexPath.row]) // UserDefaults.standard.set(vc3.data, forKey: "SavedArray3") // self.navigationController?.popViewController(animated: true) } else{ // vc3.data.append(allCourses[indexPath.row] as! String) // UserDefaults.standard.set(vc3.data, forKey: "SavedArray3") // self.navigationController?.popViewController(animated: true) } } else if (tag == 3){ if (resultSearchController.isActive){ // vc4.data.append(filteredCourses[indexPath.row]) // UserDefaults.standard.set(vc4.data, forKey: "SavedArray4") // self.navigationController?.popViewController(animated: true) } else{ // vc4.data.append(allCourses[indexPath.row] as! String) // UserDefaults.standard.set(vc4.data, forKey: "SavedArray4") // self.navigationController?.popViewController(animated: true) } } } var isSearchBarEmpty: Bool { return resultSearchController.searchBar.text?.isEmpty ?? true } } extension SearchPage: UISearchResultsUpdating { func updateSearchResults(for searchController: UISearchController) { filteredCourses.removeAll(keepingCapacity: false) let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchController.searchBar.text!) let array = (allCourses as NSArray).filtered(using: searchPredicate) filteredCourses = array as! [String] self.tableView.reloadData() } }
我注释掉了UsersDefault.standard.set ....,因为数据本身似乎没有刷新并没有显示在tableView atm中
我有一个名为yearOne的CollectionViewController,它看起来像这样:当您单击每个四分之一单元格的添加按钮时,它会带您到SearchPage:我曾使用委托来追加数据...
检查您的cellForRow方法。我不相信您在任何地方设置文字。