如何通过再次轻触所选按钮取消选择多个UITableview单元格

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath)
    
    // 判断当前单元格是否已经被选中
    if cell?.isSelected == true {
        cell?.isSelected = false
        // 取消选中状态，修改选中按钮的图片或状态
    } else {
        cell?.isSelected = true
        // 设置选中状态，修改选中按钮的图片或状态
    }
}

var selectedIndexPaths: [IndexPath] = []

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath)
    
    // 判断当前单元格是否已经被选中
    if cell?.isSelected == true {
        cell?.isSelected = false
        // 取消选中状态，修改选中按钮的图片或状态
        if let index = selectedIndexPaths.firstIndex(of: indexPath) {
            selectedIndexPaths.remove(at: index)
        }
    } else {
        cell?.isSelected = true
        // 设置选中状态，修改选中按钮的图片或状态
        selectedIndexPaths.append(indexPath)
    }
}

@IBAction func deselectAllButtonTapped(_ sender: UIButton) {
    for indexPath in selectedIndexPaths {
        if let cell = tableView.cellForRow(at: indexPath) {
            cell.isSelected = false
            // 取消选中状态，修改选中按钮的图片或状态
        }
    }
    selectedIndexPaths.removeAll()
}