展开当前单元格时折叠其他 UITableViewCell [英] Collapse other UITableViewCell when current cell is expanded

问题描述

我正在尝试扩展我的 UITableViewCell 并且我可以扩展单元格.但我想折叠未选中的 UITableViewCell.

I am trying to expand my UITableViewCell and I can expand cells. But I want to collapse the UITableViewCell which are not selected.

我在代码中尝试的内容:

What I am trying in code:

var expandedCells = [Int]()
@IBOutlet weak var tableVieww:UITableView!
@IBAction func buttonPressed(_ sender: AnyObject) {
    // If the array contains the button that was pressed, then remove that button from the array
    if expandedCells.contains(sender.tag) {
        expandedCells = expandedCells.filter({ $0 != sender.tag})
    }
        // Otherwise, add the button to the array
    else {
        expandedCells.append(sender.tag)
    }
    // Reload the tableView data anytime a button is pressed
    tableVieww.reloadData()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 20

}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! exampleCell
    cell.myButton.tag = indexPath.row
    return cell
}

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    // Set the row height based on whether or not the Int associated with that row is contained in the expandedCells array
    if expandedCells.contains(indexPath.row) {
        return 212
    } else {
        return 57
    }
}

推荐答案

您可以维护一个变量来维护选定的索引，如下所示，

You can maintain a variable for maintaining the selected index as below,

var expandedIndexPath: IndexPath?

然后按如下方式更新您的 tableView 委托，

Then update your tableView delegate as follows,

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    expandedIndexPath = indexPath // Update the expandedIndexPath with the selected index
    tableView.reloadData() // Reload tableview to reflect the change
}

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    // Check wether expanded indexpath is the current index path and updated return the respective height
    if expandedIndexPath == indexPath {
        return 212
    } else {
        return 57
    }
}

这应该可以正常工作.

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