ios – swift 3.0多项选择,全选选项

我已经在表格视图中添加了数据,并且我已经手动添加“全选”选项以便在第一个位置列出现在当用户选择第一个选项时选择全部,然后选择列表中的所有项目并在选择相同时取消选择.我已经尝试过下面的代码,但它没有工作,所以任何人都可以帮我解决这个问题

func tableView(_ tableView: UITableView,didSelectRowAt indexPath: IndexPath) {
    let cell = ObjTableview.dequeueReusableCell(withIdentifier: "Cell",for: indexPath) as! SelectUserCell
    for i in 0 ..< self.getStudentName.count {
        cell.btnCheckBox.setimage(UIImage(named: "selectedItem"),for: .normal)
        print (i) //i will increment up one with each iteration of the for loop

    }

}
var unchecked = true
 @IBAction func btnCheckBoxClick(_ sender: Any) {

if unchecked == true {
           //(sender as AnyObject).setimage(UIImage(named: "selectedItem"),for: .normal)
            cell?.btnCheckBox.setimage(UIImage(named: "selectedItem"),for: .normal)
            //unchecked = false
            let cello = ObjTableview.cellForRow(at: indexPath!)
            print(cello!)
            ObjTableview.reloadData()
        }else
        {
            //(sender as AnyObject).setimage(UIImage(named: "unSelectedItem"),for: .normal)
            cell?.btnCheckBox.setimage(UIImage(named: "unSelectedItem"),for: .normal)
           // unchecked = true
        }
}

解决方法

Jayprakash,你快到了.你需要修改一些行 –

这是您修改后的代码段

var unchecked:Bool = true

@IBAction func btnCheckBoxClick(_ sender: Any) {

    if(unchecked){

        unchecked = false
    }
    else{

        unchecked = true
    }


    ObjTableview.reloadData()


}



func tableView(_ tableView: UITableView,didSelectRowAt indexPath: IndexPath) {

    if(indexPath.row == 0){

            btnCheckBoxClick(sender: UIButton())

      }

 }


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

        let cell : SelectUserCell!
        cell = tableView .dequeueReusableCell(withIdentifier: "SelectUserCell",for: indexPath) as! SelectUserCell
        cell.selectionStyle = UITableViewCellSelectionStyle.none


       if(unchecked){

              cell.btnCheckBox.setimage(UIImage(named: "unSelectedItem"),for: .normal)

         }
       else{

              cell.btnCheckBox.setimage(UIImage(named: "selectedItem"),for: .normal)
         }


   // Do your stuff here

   return cell
}

跳它将简化您的代码结构.