Question

根据以下代码，我第一次运行应用程序。前3行正常工作。但是当我向上和向下滚动时。有些线也会改变。当我多做一点上下它改为其他行

我该如何解决这个问题

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    var cell = KategoriEkleCell()
  var KategoriId :String = ""


    if tableView == tableView {
        cell.selectionStyle = .none
        cell = self.tableView.dequeueReusableCell(withIdentifier: "cellIdentifier", for: indexPath as IndexPath) as! KategoriEkleCell
        cell.itemLabel.text = (AltKategoriKayit[indexPath.section][indexPath.row] as? [String:String])?["kategoriadi"]
        cell.itemLabel.font = UIFont(name:"OpenSans-Light", size: 14.0)

        KategoriId = ((AltKategoriKayit[indexPath.section][indexPath.row]  as? [String:String])?["kategoriid"])!
        if (KategoriId) == (MenuKategoriKayit[indexPath.row]["kategoriid"]!) {

            cell.EkleButton.layer.cornerRadius = 2
            cell.EkleButton.layer.borderWidth = 1
            cell.EkleButton.layer.borderColor = UIColor(red: 255/255, green: 56/255, blue: 107/255, alpha: 1.0).cgColor
            cell.EkleButton.backgroundColor = UIColor(red: 255/255, green: 56/255, blue: 107/255, alpha: 1.0)
            cell.EkleButton.setTitleColor(UIColor.white, for: .normal)
            cell.EkleButton.clipsToBounds = true

        }else {

            cell.EkleButton.layer.cornerRadius = 2
            cell.EkleButton.layer.borderWidth = 1
            cell.EkleButton.layer.borderColor = UIColor(red: 255/255, green: 56/255, blue: 107/255, alpha: 1.0).cgColor
            cell.EkleButton.clipsToBounds = true

        }
    }
    return cell
}

合适的员工

员工有缺陷。当我向上和向下滚动时。

Answer 1

正如评论中所提到的，细胞被重复使用。

您必须确保在cellForRow中将任何UI元素设置为已定义的状态。我将if和else分支中执行的重复行移出if - else范围，以提高可读性。

顺便说一句，if行中的括号也不需要

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

    let specialRed = UIColor(red: 1.0, green: 56/255, blue: 107/255, alpha: 1.0)
    let cell = self.tableView.dequeueReusableCell(withIdentifier: "cellIdentifier", for: indexPath) as! KategoriEkleCell
    cell.selectionStyle = .none
    cell.itemLabel.text = (AltKategoriKayit[indexPath.section][indexPath.row] as? [String:String])?["kategoriadi"]
    cell.itemLabel.font = UIFont(name:"OpenSans-Light", size: 14.0)

    let KategoriId = ((AltKategoriKayit[indexPath.section][indexPath.row]  as? [String:String])?["kategoriid"])!
    cell.EkleButton.layer.cornerRadius = 2
    cell.EkleButton.layer.borderWidth = 1
    cell.EkleButton.clipsToBounds = true
    cell.EkleButton.layer.borderColor = specialRed.cgColor

    if KategoriId == MenuKategoriKayit[indexPath.row]["kategoriid"]! {

        cell.EkleButton.backgroundColor = specialRed
        cell.EkleButton.setTitleColor(UIColor.white, for: .normal)
    } else {
        cell.EkleButton.backgroundColor = UIColor.white
        cell.EkleButton.setTitleColor(specialRed, for: .normal)
    }
    return cell
}

请注意，根据命名约定，变量名称应以小写字母开头。

UITableView cellForRowAt if语句错误工作

1 个答案: