UIButton状态在滚动具有多个部分的表视图时发生变化-Swift

Question

我的表视图中有多个部分，其中包含多个自定义单元格(带有单选按钮的单元格、带有复选框的单元格和带有文本字段的单元格(。问题出现在带有单选按钮的部分下，单选按钮部分下只能选择一个单选按钮。选择后，我尝试滚动，选择了多个单选按钮。非常感谢您的帮助。

class RedioButtonCell: UITableViewCell {
var radioButtonDelegate: RedioCellDelegate?
var cellindexPath : IndexPath?
@IBOutlet weak var btnRediouttion: UIButton?
@IBOutlet weak var lblTitle: UILabel?

override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
}

行法单元格：

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if ((qaArray[indexPath.section]["Que"] as! [String:String])["type"]!) == CONTROL
{
let  cell = tableView.dequeueReusableCell(withIdentifier: "RedioButtonCell", for: indexPath) as! RedioButtonCell
cell.btnRediouttion?.tag = Int("(indexPath.section)" +  "(indexPath.row)")!
cell.lblTitle!.text = String(describing: ansDetailArray[indexPath.row]["survey_answer"]!)

let deselectedImage = UIImage(named:         "Radio_Unselected")?.withRenderingMode(.alwaysTemplate)
let selectedImage = UIImage(named: "radio_Selected")?.withRenderingMode(.alwaysTemplate)
btnRediouttion?.setImage(deselectedImage, for: .normal)
btnRediouttion?.setImage(selectedImage, for: .selected)
btnRediouttion?.addTarget(self, action:    #selector(self.radioButtonTapped), for: .touchUpInside)
cell.cellindexPath = indexPath;
return cell
}
}
func radioButtonTapped(_ radioButton: UIButton) {
print("radio button tapped")
let isSelected = !(radioButton?.isSelected)!
radioButton?.isSelected = isSelected
if isSelected {

}
}

Answer 1

tableView单元格被重用(在滚动时发生(，因此您需要通过保存所选单元格的IndexPath并将其分配到cellForRowAt中来跟踪所选单元格

//

在您的VC 中声明

var currentIndex:IndexPath?

//

class RadioButton:UIButton {
var indexPath:IndexPath
}

//

func radioButtonTapped(_ radioButton: RadioButton) {
self.currentIndex = radioButton.indexPath
}

//

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath == currentIndex {
// this should be selected
}
else {
// Deselect this 
}
cell.radioButton.indexPath = indexPath 
}