如何使用自定义复选框按钮选择表格视图行选择？

Question

如何使用自定义按钮选择 tableview 行。我有另一个按钮，称为选择所有它在表格视图之外我的问题是在点击表格视图按钮外部时如何在表格视图行内选择和取消选择？同时我可以在表格视图中选择单行吗？如何在swift 3中做到这一点？这是我在 cellforrow 方法中的代码

 func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {


    let identifier = "Custom"
    var cell: TStudentAttendanceCell! = tableView.dequeueReusableCell(withIdentifier: identifier) as? TStudentAttendanceCell
    if cell == nil {
        tableView.register(UINib(nibName: "TStudentAttendanceCell", bundle: nil), forCellReuseIdentifier: identifier)
        cell = tableView.dequeueReusableCell(withIdentifier: identifier) as? TStudentAttendanceCell
    }
    print("studentAttendanvceArray--",studentAttendanceArray.object(at: indexPath.row) )
    var localDic :NSDictionary!

    localDic = studentAttendanceArray.object(at: indexPath.row) as! NSDictionary

    Common.sharedInstance.StopActivity()        
    cell.profile_img.image = self.image
    cell.name_lbl.text = localDic["student_name"] as? String
    cell.selectionStyle = UITableViewCellSelectionStyle.none
    cell.contentView.backgroundColor = UIColor.clear
    let whiteRoundedView : UIView = UIView(frame: CGRect(x: 10, y: 8, width: self.view.frame.size.width - 20, height: 90))

    whiteRoundedView.layer.backgroundColor = CGColor(colorSpace: CGColorSpaceCreateDeviceRGB(), components: [1.0, 1.0, 1.0, 0.9])
    whiteRoundedView.layer.masksToBounds = false
    whiteRoundedView.layer.cornerRadius = 2.0
    whiteRoundedView.layer.shadowOffset = CGSize(width: -1, height: 1)
    whiteRoundedView.layer.shadowOpacity = 0.2
    cell.contentView.addSubview(whiteRoundedView)
    cell.contentView.sendSubview(toBack: whiteRoundedView)

    return cell

}

Answer 1

视图控制器

class ViewController: UIViewController,UITableViewDelegate, UITableViewDataSource {

  @IBOutlet var tableView: UITableView!
  var allStudentsArr:[[String:String]] = []
  var selectedRows:[IndexPath] = []


  override func viewDidLoad() {
    super.viewDidLoad()
    tableView.allowsSelection = false
    allStudentsArr = [["name":"name1"],["name":"name2"],["name":"name3"],["name":"name4"],["name":"name5"],["name":"name6"],["name":"name7"],["name":"name8"]]
  }
  func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return allStudentsArr.count
  }

  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as! CustomTableViewCell
    cell.nameLbl.text = allStudentsArr[indexPath.row]["name"]
    if selectedRows.contains(indexPath)
    {
      cell.checkBox.setImage(UIImage(named:"selected"), for: .normal)
    }
    else
    {
      cell.checkBox.setImage(UIImage(named:"unselected"), for: .normal)
    }
    cell.checkBox.tag = indexPath.row
    cell.checkBox.addTarget(self, action: #selector(checkBoxSelection(_:)), for: .touchUpInside)
    return cell
  }
  @objc func checkBoxSelection(_ sender:UIButton)
  {
    let selectedIndexPath = IndexPath(row: sender.tag, section: 0)
    if self.selectedRows.contains(selectedIndexPath)
    {
      self.selectedRows.remove(at: self.selectedRows.index(of: selectedIndexPath)!)
    }
    else
    {
      self.selectedRows.append(selectedIndexPath)
    }
    self.tableView.reloadData()
  }
  @IBAction func selectAllBtnAction(_ sender: UIBarButtonItem) {
    self.selectedRows = getAllIndexPaths()
    self.tableView.reloadData()
  }

  func getAllIndexPaths() -> [IndexPath] {
    var indexPaths: [IndexPath] = []
      for j in 0..<tableView.numberOfRows(inSection: 0) {
        indexPaths.append(IndexPath(row: j, section: 0))
      }
        return indexPaths
  }
}

自定义单元格

class CustomTableViewCell: UITableViewCell {

  @IBOutlet var nameLbl: UILabel!
  @IBOutlet var checkBox: UIButton!
}

Answer 2

这就是您如何以编程方式选择单个部分的所有行

@IBAction func didTapSelectAllButton(sender: UIButton) {
        let totalRows = tableView.numberOfRows(inSection: 0)// Make some logic if you have more than 1 section
        for row in 0..<totalRows {
            let indexPath = IndexPath(row: row, section: 0)
            tableView.selectRow(at: indexPath, animated: false, scrollPosition: .none)
        }
    }

如果您不想使用 tableView 的默认复选框，请禁用 tableView 的 multipleSelection 并使用额外的全局数组实现逻辑。

var selectedArrayIndex = [Int]()
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    if selectedArrayIndex.contains(indexPath.row) {
        selectedArrayIndex.remove(at: selectedArrayIndex.index(of: indexPath.row)!)
    }else {
        selectedArrayIndex.append(indexPath.row)
    }
}
override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    if selectedArrayIndex.contains(indexPath.row) {
        // Enable You Check
        cell.checkBoxView.isHidden = false
    }else {
        cell.checkBoxView.isHidden = true
    }
}
@IBAction func didTapSelectAllButton(sender: UIButton) {
    let totalRows = tableView.numberOfRows(inSection: 0)// Make some logic if you have more than 1 section
    selectedArrayIndex.removeAll()
    for row in 0..<totalRows {
        selectedArrayIndex.append(row)
    }
}