选择所有单元格的Swift 3.0多重选择
我在表格视图中添加了数据，并且我已经在第一个位置手动添加了“全选”选项，现在当用户选择第一个选项“全部选择”时，则手动选择“全部选择”选项未被选中。 选择全部，点击然后工作所有人或取消选择工作但信号选择所有不工作的人“全选”我已经尝试了下面的代码，但它不起作用所以任何人都可以帮我解决这个问题？
var unchecked:Bool = true func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { // create a new cell if needed or reuse an old one let cell = ObjTableview.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! SelectUserCell // set the text from the data model cell.selectionStyle = UITableViewCellSelectionStyle.none cell.lblStudentName.text = getStudentName[indexPath.row] if UnAll == "unselect" { if indexPath.row == 0 { cell.btnCheckbox.setImage(UIImage(named: "unSelectedItem"), for: .normal) } if indexPath.row == Int(selectedNumber) { cell.btnCheckbox.setImage(UIImage(named: "unSelectedItem"), for: .normal) } if indexPath.row == Int(unSelectNumber) { //var j = "\(i)" cell.btnCheckbox.setImage(UIImage(named: "selectedItem"), for: .normal) } }else { if(unchecked){ cell.btnCheckbox.setImage(UIImage(named: "unSelectedItem"), for: .normal) } else{ cell.btnCheckbox.setImage(UIImage(named: "selectedItem"), for: .normal) } } return cell } var UnAll = "" var selectedNumber = "" var unSelectNumber = "" var checkselect:Bool = true func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { UnAll.removeAll() selectedNumber.removeAll() unSelectNumber.removeAll() if(indexPath.row == 0){ btnCheckBoxClick(sender: UIButton()) }else { UnAll = "unselect" btnCheckBoxClick(sender: UIButton()) if checkselect { selectedNumber = "\(indexPath.row)" checkselect = false }else { unSelectNumber = "\(indexPath.row)" checkselect = true } print("the selected index is : \(indexPath.row)") } } @IBAction func btnCheckBoxClick(_ sender: Any) { if(unchecked){ unchecked = false } else{ unchecked = true } ObjTableview.reloadData() } 使用Bool属性为模型数据创建结构。 您可以通过单元格选择来修改此属性。
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource { var allCharacters:[Character] = [] override func viewDidLoad() { super.viewDidLoad() allCharacters = [Character(name: "All"),Character(name: "Luke Skywalker"),Character(name: "Leia Organa"),Character(name: "Advik Shah"),Character(name: "Aarav Modi")] } func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return allCharacters.count } func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { var cell = tableView.dequeueReusableCell(withIdentifier: "Cell") if cell == nil{ cell = UITableViewCell(style: .subtitle, reuseIdentifier: "Cell") } cell?.textLabel?.text = allCharacters[indexPath.row].name if allCharacters[indexPath.row].isSelected { cell?.accessoryType = .checkmark } else { cell?.accessoryType = .none } cell?.selectionStyle = .none return cell! } func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { if indexPath.row == 0 { allCharacters[indexPath.row].isSelected = !allCharacters[indexPath.row].isSelected for index in allCharacters.indices { allCharacters[index].isSelected = allCharacters[indexPath.row].isSelected } } else { allCharacters[indexPath.row].isSelected = !allCharacters[indexPath.row].isSelected if allCharacters.dropFirst().filter({ $0.isSelected }).count == allCharacters.dropFirst().count { allCharacters[0].isSelected = true } else { allCharacters[0].isSelected = false } } tableView.reloadData() } } struct Character { var name:String // var otherDetails var isSelected:Bool! = false init(name:String) { self.name = name } }
从字典数组创建Struct对象数组
let SubjectArray = json["students"] as! [[String:Any]] allCharacters = SubjectArray.map({ Character(name: $0["studentName"] as! String) }) allCharacters.insert(Character(name:"All"), at: 0)
我喜欢@Pranil建议在“All”行中使用单独的部分，所以我偷了它。
您可以使用NSMutableIndexSet跟踪选定的行。 这比必须创建一个新的结构或布尔数组或其他东西更简单。 您需要注意的唯一事情是，如果您的tableview允许行重新排序，则需要相应地调整索引集。
这是我的实施。 “所有”状态由所选行的数量等于数据源数组中的行数确定。
我刚刚使用简单的表格视图配件作为复选标记，但我相信你可以在cellForRow(at:)看到如何采用基于图像的方法cellForRow(at:)
导入UIKit
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate { @IBOutlet weak var tableview: UITableView! let names: [String]? = ["Luke Skywalker","Leia Organa","Advik Shah","Aarav Modi"] var selectedRows = NSMutableIndexSet() override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } func numberOfSections(in tableView: UITableView) -> Int { return 2 } func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { guard let names = self.names else { return 0 } return 0 == section ? 1 : names.count } func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell = tableView.dequeueReusableCell(withIdentifier: "tableCell", for: indexPath) var text: String var accessory = UITableViewCellAccessoryType.none if 0 == indexPath.section { text = "All" if self.selectedRows.count == self.names!.count { accessory = .checkmark } } else { text = names![indexPath.row] if selectedRows.contains(indexPath.row) { accessory = .checkmark } } cell.textLabel!.text = text cell.accessoryType = accessory return cell } func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath? { if indexPath.section == 0 { if self.selectedRows.count == self.names!.count { self.selectedRows = NSMutableIndexSet() } else { self.selectedRows = NSMutableIndexSet(indexesIn: NSRange(location: 0, length: self.names!.count)) } tableView.reloadData() } else { self.selectedRows.contains(indexPath.row) ? self.selectedRows.remove(indexPath.row) : self.selectedRows.add(indexPath.row) let rows = [IndexPath(row: 0, section: 0), indexPath] tableView.reloadRows(at: rows, with: .none) } return nil } }
我认为你在表格视图中只使用了一个部分。 我建议你在表格视图中使用两个部分，这样第一部分只包含一行（全选），第二部分将包含其他选项。 当您单击“全选”时，即在第一部分的第一行中，您可以在重新加载表视图时将第二部分中的所有行设置为已选中。
// MARK: - struct for cell item struct CellItem { var name : String var isSelected:Bool! = false init(name: String) { self.name = name } } class ViewController: UITableViewController { @IBOutlet var viewTable: UITableView! // Declare a boolean varaible to toggle the checkbox in the first section of table view var isSelectAllSelected : Bool = false var cellData: [CellItem] = [] override func viewDidLoad() { super.viewDidLoad() cellData = [CellItem(name: "Luke Skywalker"),CellItem(name: "Leia Organa"),CellItem(name: "Advik Shah"),CellItem(name: "Aarav Modi")] } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() } // MARK: - Table view data source override func numberOfSections(in tableView: UITableView) -> Int { return 2 } override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { if section == 0 { return 1 } else { return cellData.count } } override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat { return 0 } // MARK: - Table view delegates override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { return 60 } override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{ let cell = TableCell() cell.selectionStyle = .none if indexPath.section == 0 { cell.textLabel?.text = "Select All" if isSelectAllSelected{ cell.accessoryType = .checkmark } else{ cell.accessoryType = .none } } else { cell.textLabel?.text = cellData[indexPath.row].name if cellData[indexPath.row].isSelected{ cell.accessoryType = .checkmark } else{ cell.accessoryType = .none } } return cell } override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { if indexPath.section == 0 { cellData[indexPath.row].isSelected = !cellData[indexPath.row].isSelected isSelectAllSelected = cellData[indexPath.row].isSelected for index in cellData.indices { cellData[index].isSelected = cellData[indexPath.row].isSelected } } else { cellData[indexPath.row].isSelected = !cellData[indexPath.row].isSelected if cellData.filter({ $0.isSelected }).count == cellData.count { isSelectAllSelected = true } else { isSelectAllSelected = false } } viewTable.reloadData() } }
您好，您可以使用addtarget方法在视图控制器内部使用cheboxbutton动作方法并分配标记indexpath.row，这样您就可以轻松获取索引路径。 从下面的代码你可以得到这个想法。
class ViewController:UIViewController,UITableViewDelegate,UITableViewDataSource { @IBOutlet weak var ObjTableview: UITableView! var arrStudent = ["1","2","3","4","5"] var arrSelectedStudent :[Int] = [] var selectAll:Bool = false override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } //MARK: UITableViewDataSource func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return arrStudent.count } func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { // create a new cell if needed or reuse an old one let cell = ObjTableview.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! SelectUserCell // set the text from the data model cell.selectionStyle = UITableViewCellSelectionStyle.none // cell.lblStudentName.text = getStudentName[indexPath.row] cell.lblStudentName.text = arrStudent[indexPath.row] cell.btnCheckbox.tag = indexPath.row cell.btnCheckbox.addTarget(self, action:#selector(btnCheckBoxClick(sender:)), for: .touchUpInside) if selectAll { cell.btnCheckbox.setImage(UIImage(named: "selectedItem"), for: .normal) }else{ if arrSelectedStudent.contains(indexPath.row){ cell.btnCheckbox.setImage(UIImage(named: "selectedItem"), for: .normal) }else{ cell.btnCheckbox.setImage(UIImage(named: "unSelectedItem"), for: .normal) } } return cell } func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { } func btnCheckBoxClick(sender: UIButton) { if sender.tag == 0{ selectAll = true }else { selectAll = false if let index = arrSelectedStudent.index(of: sender.tag) { arrSelectedStudent.remove(at: index) }else{ arrSelectedStudent.append(sender.tag) } } ObjTableview.reloadData() }}