如何旋转图像选定行和取消旋转图像未选定行

Question

我有这样的问题：

我有一些行，当我单击第 0 行时，它会展开并且下拉图像会旋转。当我单击第 1 行时，它会展开第 1 行并取消展开第 0 行，第 0 行中的下拉图像恢复正常（向下箭头），第 1 行中的下拉图像旋转（向上箭头）。

到目前为止，这是我的代码：

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let cell = self.tableView.cellForRow(at: indexPath) as! PaymentMethodCell
    let clickedRow = indexPath.row
    if indexPath.row == selectedRow{
        print("yang muncul selectedRow = -1")
        if cell.isSelected {
            selectedRow = -1
            print("This cell is deselected :\(selectedRow)")
            cell.ivExpand.transform = CGAffineTransform(rotationAngle: (180.0 * CGFloat.pi) * 180.0)
        }else{
            selectedRow = indexPath.row
            cell.ivExpand.transform = CGAffineTransform(rotationAngle: (180.0 * CGFloat.pi) / 180.0)
        }
    }else{
        if cell.isSelected {
            selectedRow = indexPath.row
            print("This cell is selected :\(selectedRow)")
            cell.ivExpand.transform = CGAffineTransform(rotationAngle: (180.0 * CGFloat.pi) / 180.0)
        }else{
            selectedRow = -1
            cell.ivExpand.transform = CGAffineTransform(rotationAngle: (180.0 * CGFloat.pi) * 180.0)
        }
        cell.lblclickedsubcell.text="00"
        print("cell.lblclickedsubcell.text:\(String(describing: cell.lblclickedsubcell.text!))")
    }
    tableView.reloadData()
}

但结果是在我展开第 0 行然后单击第 1 行、第 0 行未展开和第 1 行展开后。但是第 0 行的下拉图像仍然没有恢复正常（向下箭头）。它仍然是向上箭头。

这里是 cellForRowAt ：

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    var cell = tableView.dequeueReusableCell(withIdentifier: "PaymentMethodCell", for: indexPath) as! PaymentMethodCell
    cell.ivPaymentMeyhod.contentMode = UIViewContentMode.scaleAspectFit
    cell.ivPaymentMeyhod.contentMode = UIViewContentMode.left
    cell.ivPaymentMeyhod.clipsToBounds=false
    //cell.ivPaymentMeyhod.kf.setImage(with: url!)
    cell.ivPaymentMeyhod.image = UIImage(named: "\(PaymentImageArray[indexPath.item])")
    let clickedRow = indexPath.row
    cell.lblclickedRow.text = "\(indexPath.row)"
    let ContractNumber = "\(contractnumber!)"
    if(CustomUserDefaults.shared.isGuest() || ContractNumber==""){
        cell.lblContractNumber.text = ""
        cell.lblContractAmount.text = ""
    }else{
        cell.lblContractNumber.text = "\(contractnumber!)"
        cell.lblContractAmount.text = "\(contractamount!)"
    }
    if(clickedRow==0){
        cell.tableView.isHidden=true
        cell.XibView.isHidden=false
        let AlfaIndoView = HowToPayView.AlfaIndoNib()
        let cellwidth = cell.XibView.bounds.width
        print("cellwidth:\(cellwidth)")
        cell.XibView.addSubview(AlfaIndoView)
        AlfaIndoView.autoresizingMask = [.flexibleHeight, .flexibleWidth]
        AlfaIndoView.frame.size.width = cellwidth
    }else if(clickedRow==1){
        cell.tableView.isHidden=true
        cell.XibView.isHidden=false
        let POSindonesiaView = HowToPayView.POSindonesiaNib()
        let cellwidth = cell.XibView.bounds.width
        print("cellwidth:\(cellwidth)")
        cell.XibView.addSubview(POSindonesiaView)
        POSindonesiaView.autoresizingMask = [.flexibleHeight, .flexibleWidth]
        POSindonesiaView.frame.size.width = cellwidth
    }else if(clickedRow==2){
        cell.tableView.isHidden=false
        cell.XibView.isHidden=true
        cell.setUpTable()
    }else if(clickedRow==3){
        cell.tableView.isHidden=false
        cell.XibView.isHidden=true
        cell.setUpTable()
    }else if(clickedRow==4){
        cell.tableView.isHidden=false
        cell.XibView.isHidden=true
        cell.setUpTable()
    }else if(clickedRow==5){
        cell.tableView.isHidden=false
        cell.XibView.isHidden=true
        cell.setUpTable()
    }else if(clickedRow==6){
        cell.tableView.isHidden=true
        cell.XibView.isHidden=false
        let ATMbersamaView = HowToPayView.ATMbersamaNib()
        let cellwidth = cell.XibView.bounds.width
        print("cellwidth:\(cellwidth)")
        cell.XibView.addSubview(ATMbersamaView)
        ATMbersamaView.autoresizingMask = [.flexibleHeight, .flexibleWidth]
        ATMbersamaView.frame.size.width = cellwidth
    }
    return cell
}

帮帮我，请修复此代码

Answer 1

如果我们能看到您的cellForRow 代码会更清楚。据我所知，您最后调用了reloadData()，因此您的单元格正在重新渲染，因此您必须在cellForRow 代码中处理箭头的方向。所以在伪代码形式下，它会有点像以下：

在didSelect函数中：

selectedIndexPath = indexPath
//...other related statements

在cellForRow函数中：

if indexPath == selectedIndexPath {
    //rotate arrow down
    //other relevant code
}
else {
    //rotate arrow up
    //other relevant code
}