Question

我的词典中包含相同的键：

var food = [["item" : "Burger", "image": "burger"],
            ["item" : "Pizza", "image": "pizza"],
            ["item" : "Lunch", "image": "lunch"],
            ["item" : "Coffee", "image": "coffee"]],

它在我的表视图中使用。每个单元都显示出一个名称。

 override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! Cell

    let foodObjects = food[indexPath.row]

    cell.background.image = UIImage(named: foodObjects["image"]!)
    cell.nameLabel.text  = foodObjects["item"]

    return cell
}

我想要的是，来自所选单元格的项目值会传递给第二个View Controller。我知道我可以在整个函数中执行此操作，但我无法从所选项中获取值。有人能帮助我吗？

 override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    let indexPath = self.tableView.indexPathForSelectedRow?.row

    let resVC = segue.destination as! RestaurantVC //second View controller

    let selectedItem = food[indexPath.["item"]] // How to do this??
}

Answer 1

创建像

这样的属性

控制器上的var selectedItem。

On did选择将该项目保存到selectediItem。

比在准备segue方法中使用它。

Answer 2

使用此方法从tableview

中选择特定对象

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

 //print(food[indexPath.row].first?.value)
            }

Answer 3

如果要从override func prepare(for segue: UIStoryboardSegue, sender: Any?)函数中找到所选的索引路径。你可以使用tableView.indexPath(for cell: UITableViewCell)。请尝试以下代码

override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{

        let destinationViewController = segue.destination as! RestaurantVC

        if let selectedCell = sender as? UITableViewCell
        {
            let indexPath = tableView.indexPath(for: selectedCell)
            let foodObjects = food[indexPath.row]

        }

}

Answer 4

像这样在RestaurantVC中创建一个属性

var selectedItem:String!

然后尝试这个

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    let indexPath = self.tableView.indexPathForSelectedRow?.row

    let resVC = segue.destination as! RestaurantVC //second View controller

    resVC.selectedItem = food[tableview.indexPathForSelectedRow.row]["item"] // How to do this??
}

Answer 5

请试试这个

var food: [Dictionary<String, String>] = [["item" : "Burger", "image": "burger"],
            ["item" : "Pizza", "image": "pizza"],
            ["item" : "Lunch", "image": "lunch"],
            ["item" : "Coffee", "image": "coffee"]]

您可以通过以下代码

在控制器selectedItem中设置resVC

resVC.selectedItem = food[indexPath]["item"]!

或

let selectedItem = food[indexPath]["item"]
if let selectedItem = selectedItem {
    resVC.selectedItem = selectedItem
}

Answer 6

检查my answer here的可能性。使用委托从所选单元格（您已经传递到cellForRowAtIndexPath上的单元格（如cell.nameLabel.text = foodObjects["item"]）中检索数据，并在委托事件中执行segue以移动到新控制器并将您收到的数据作为参数到事件。所以它会像：

func foodItemCellSelected(using foodItem: [String]) // Delegate event of custom cell
{
    self.selectedFoodItem = foodItem; // Retrieve selected item and save it in VC
    self.performSegue(.....);  // Perform segue
}


override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    let indexPath = self.tableView.indexPathForSelectedRow?.row

    let resVC = segue.destination as! RestaurantVC //second View controller

    resVC.foodItem = self.selectedFoodItem
}

如何通过tableView从字典中获取选定的值？

6 个答案: