Swift 3.0 多选与全选单元格

问题描述

我已经在表格视图中添加了数据，并且我已经在列表的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选"然后人手动选项全选"未被选中.全选，单击然后为所有人工作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，所以有人能帮我解决这个问题吗?

I have added data in table view and I have manually added "select all" option to the list at first position, now when the user selects the first option which is 'select all' then the person manually option "Select all" is not selected. Select all, click then work all person or deselect working but signal selection all the person not working "Select all"I have tried the code below but it's not working so can any one help me to solve this?

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()
         }

推荐答案

为具有 Bool 属性的模型数据创建结构.您可以通过选择单元格来修改此属性.

Create a struct for model data with a Bool property. You can modify this property by cell selection.

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
  }
}

从字典数组创建结构对象数组

let SubjectArray = json["students"] as! [[String:Any]]
allCharacters = SubjectArray.map({ Character(name: $0["studentName"] as! String) })
allCharacters.insert(Character(name:"All"), at: 0)

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