双击 UITableView 单元格应该转到以前的状态 [英] UITableView cell on double click should go to previous state

问题描述

如果我选择(单击)TableView 的行，它应该添加 Image 说我选择了这个特定的项目.它工作正常！

If I select (click) row of TableView, it should add Image saying that I selected this particular Item. It's working fine!

我的问题是:如果用户想从所选项目移回.如果我点击同一行，它应该取消选择该单元格并隐藏该图像.

My problem is: if user want to move back from that selected item. If I click on the same row it should deselect that cell and hide that image.

我尝试的是:

func tableView (_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
     return tableData.count
        }

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

    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath as IndexPath) as! leistungCell

    // Configure the cell...
    let tableData = self.tableData[indexPath.row]

    cell.leistungLbl.text = tableData["leistung_info"] as? String

    //space between Rows
    cell.contentView.backgroundColor = colorLightGray
    cell.contentView.layer.borderColor = UIColor.white.cgColor


    //space between Rows
    cell.contentView.layer.borderWidth = 3.0
    cell.contentView.layer.cornerRadius = 8

    return cell


}

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


    let cell = tableView.cellForRow(at: indexPath)


    cell?.imageView?.image = UIImage(named: "check.png")

    let value = Info["leistung_info"] as! String     

}

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

    let cell = tableView.cellForRow(at: indexPath)
    cell?.imageView?.image = nil
}

推荐答案

忘记并删除 didDeSelectRowAt，只需使用 didSelectRowAt 和一个数组来保存选择:

Forget and remove didDeSelectRowAt, just use didSelectRowAt, and an array to save selections:

var selectedIndexPaths = [IndexPath]()

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath)

    if let index = selectedIndexPaths.index(of: indexPath) { //deselect it if the row is selected
        tableView.deselectRow(at: indexPath, animated: true)
        cell?.imageView?.image = nil
        selectedIndexPaths.remove(at: index)
    }
    else{ //select it if the row is deselected
        cell?.imageView?.image = UIImage(named: "check.png")
        selectedIndexPaths.append(indexPath)
    }
}

并注意细胞正在重用！请在 cellForRowAt 方法中做同样的检查.

And be aware of that the cells are being REUSED ! Please do the same check in cellForRowAt method.

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