Question

我有一张桌子。我正在使用多个单元格选择。一切都正常运行，从功能角度来看，但在UI方面却没有。每当我选择一个单元格并向下滚动时，我都会看到下面另一个单元格的颜色发生了变化，尽管该单元格从未真正被选择过。我为单元格所做的是这样的：

class FollowSportsCell: UITableViewCell {

@IBOutlet weak var sportL: UILabel!
@IBOutlet weak var backImg: UIImageView!

override func awakeFromNib() {

    super.awakeFromNib()
}

override func setSelected(_ selected: Bool, animated: Bool) {

    super.setSelected(selected, animated: animated) 
}

override func prepareForReuse() {

    super.prepareForReuse()

    backImg.backgroundColor = UIColor(hexString: "E6E6E6")

    sportL.textColor = .black


}

这是代表。

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

    return sportsArr!.count

}

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

    let cell                   = tableView.dequeueReusableCell(withIdentifier: cellReuseIdentifier, for: indexPath) as!                                                                         FollowSportsCell

    let sport                 = sportsArr![indexPath.row]["id"] as! Int

    cell.sportL.text      = sportsArr![indexPath.row]["title"] as? String

    cell.selectionStyle = UITableViewCell.SelectionStyle.none

    if selectedSports.contains(sport) {

        cell.sportL.textColor = .white

        cell.backImg.backgroundColor = UIColor(hexString: "4293CC")

    }

    return cell

}

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

    selectedCell += 1

    let sport = sportsArr![indexPath.row]["id"]

    selectedSports.append(sport! as! Int)

    if selectedCell > 1
    {
        collectionB[0].backgroundColor = UIColor(hexString: "4293CC")

        collectionB[0].isEnabled               = true
    }

}

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

    selectedCell -=  1

    selectedSports = selectedSports.filter{$0 != sportsArr![indexPath.row]["id"] as! Int}

    if selectedCell < 2
    {
        collectionB[0].backgroundColor = .lightGray

        collectionB[0].isEnabled               =  false
    }

}

当数字很低时（例如4或5），并且没有出现滚动条，一切都很好，但是一旦它们达到20-22，我就会遇到这个问题。有帮助吗？

Answer 1

您应该处理tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath)中的背景色。检查并使用以下代码。希望它能工作

 var selectedCells = Array<NSInteger>()

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

    return sportsArr!.count

}

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

    let cell             = tableView.dequeueReusableCell(withIdentifier: cellReuseIdentifier, for: indexPath) as! FollowSportsCell

    cell.sportL.text     = sportsArr![indexPath.row]["title"] as? String

    cell.selectionStyle  = UITableViewCell.SelectionStyle.none

    if self.selectedCells.contains(indexPath.row) {
        cell.sportL.textColor = .white

        cell.backImg.backgroundColor = UIColor(hexString: "4293CC")

        if self.selectedCells.count > 1
        {
            collectionB[0].backgroundColor = UIColor(hexString: "4293CC")

            collectionB[0].isEnabled               = true
        }
    }
    else
    {
        //Here Set your default color for cell backImgr background color
        cell.sportL.textColor = // set default color

            cell.backImg.backgroundColor = // set default color

    }
    return cell

}

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

    let cell = tableView.cellForRow(at: indexPath) as! FollowSportsCell

    if self.selectedCells.contains(indexPath.row) {
        //Here you will get selected cell and going to deselect...Do anything with deselection

        if let index = self.selectedCells.index{$0 == indexPath.row}
        {
          self.selectedCells.remove(at: index)
        }

        cell.sportL.textColor = .black

        cell.backImg.backgroundColor = UIColor(hexString: "E6E6E6")

        selectedCell -=  1

        selectedSports = selectedSports.filter{$0 != sportsArr![indexPath.row]["id"] as! Int}

        if self.selectedCells.count < 2
        {
            collectionB[0].backgroundColor = .lightGray

            collectionB[0].isEnabled               =  false
        }

    }
    else
    {
        self.selectedCells.append(indexPath.row)
        print(cell.sportL.text!)

        selectedCell += 1

        let sport = sportsArr![indexPath.row]["id"]

        selectedSports.append(sport! as! Int)
    }

    self.yourtblView.reloadData()



}

Answer 2

请在“ CellForRowAtIndexPAth”中选择默认颜色和所选颜色。请检查以下代码。

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

    let cell             = tableView.dequeueReusableCell(withIdentifier: cellReuseIdentifier, for: indexPath) as! FollowSportsCell
    cell.sportL.text     = sportsArr![indexPath.row]["title"] as? String
    cell.selectionStyle  = UITableViewCell.SelectionStyle.none

    let sport = sportsArr![indexPath.row]["id"]
    cell.sportL.textColor = default cell colour
    cell.backImg.backgroundColor = default cell colour


    if selectedSports.contain(sport) {
            cell.sportL.textColor = required cell colour
            cell.backImg.backgroundColor = required cell colour

    }
    return cell

    }

Answer 3

    Public Sub SpecNum2()

    Dim lrow As Long
    Worksheets("Sheet1").Range("A2").Select
    lrow = Selection.End(xlDown).Row
    TrgRw = 15

        For X = 2 To lrow
        NumX = Worksheets("Sheet1").Cells(X, 1).Value2


            For Y = 2 To 6
            TrgRw = TrgRw + 1
            Worksheets("Sheet3").Select
            pref = Cells(Y, "E").Value2
            Cells(Y, "C").Value2 = NumX & pref
            'Range("C2", Range("C2").End(xlToRight).End(xlDown)).Copy
            Range("C" & Y, Range("C" & Y).End(xlToRight)).Copy

            Worksheets("Sheet1").Select
            Range("A" & TrgRw).Select
            ActiveSheet.Paste
            Next Y
       Next X
End Sub

这可能会有所帮助

背景颜色在多单元格选择中自动更改

3 个答案: