ios - 将数据从 UITableViewCell cocoa touch 类传输到 UIViewController 类

Question

好吧，我本质上想做的是将数据从 UITableViewCell 类传输到 UIViewController 类。下面是我的 UITableViewCell:

class OrderCell: UITableViewCell {

override func awakeFromNib() {
    super.awakeFromNib()

}

var post: OrderModel!
var link: Link!

var addedList: [String:Float] = [:]


@IBOutlet weak var dishName: UILabel!
@IBOutlet weak var dishDescriptionAndPrice: UILabel!
@IBOutlet weak var numberOfOrders: UILabel!
@IBOutlet weak var addOrderBtn: UIButton!
@IBOutlet weak var subtractOderBtn: UIButton!

@IBAction func addButtonPressed(sender: AnyObject) {
    if numberOfOrders.text == "9" {
        numberOfOrders.text = "9"
    } else {
        numberOfOrders.text = String((Int(numberOfOrders.text!)! + 1))
    }
    addedList.updateValue(post.dishPrice, forKey: post.dishName)
    print(addedList)
}

@IBAction func subtractButtonPressed(sender: AnyObject) {
    if numberOfOrders.text == "0" {
        numberOfOrders.text = "0"
    } else {
        numberOfOrders.text = String((Int(numberOfOrders.text!)! - 1))
    }
}

func getOrders() -> Dictionary<String, Float> {
    return addedList
}


func configureCell(post: OrderModel) {
    self.post = post
    self.dishName.text = post.dishName
    self.dishDescriptionAndPrice.text = post.dishDescription
    self.numberOfOrders.text = "0"
}

}

我想做的是让我的另一个类(UIViewController)从上面的类中检索“addedList”。我显然不能使用prepareForSegue，而且我没有找到一种与这两个类兼容的方法来做到这一点。我愿意创建一个新类作为两者之间的“桥梁”并通过它传输数据，但我再次找不到方法来做到这一点。非常感谢您的任何帮助，提前谢谢您。

更具体地说，UIViewController 保存我的 TableView ，上面的类只是每个单元格的对象文件。我需要在调用 addButtonPressed IBaction 时传输数据。

Answer 1

您可以通过在单元类中创建委托(delegate)来完成此操作。在 View Controller 类中，在 indexPath 行的单元格下添加:

cell.delegate = self

并像这样更新你的细胞类别:

 protocol ClassNameDelegate:class {
      func addButtonAction(addedList:[String:Float])
    }

        @IBOutlet weak var dishName: UILabel!
        @IBOutlet weak var dishDescriptionAndPrice: UILabel!
        @IBOutlet weak var numberOfOrders: UILabel!
        @IBOutlet weak var addOrderBtn: UIButton!
        @IBOutlet weak var subtractOderBtn: UIButton!


        //Create a delegate

       weak var delegate: ClassNameDelegate?

        @IBAction func addButtonPressed(sender: AnyObject) {
            if numberOfOrders.text == "9" {
                numberOfOrders.text = "9"
            } else {
                numberOfOrders.text = String((Int(numberOfOrders.text!)! + 1))
            }
            addedList.updateValue(post.dishPrice, forKey: post.dishName)
            print(addedList)

            // Call this when added list is done and get the call to your view controller.

            if delegate != nil {
               delegate?.addButtonAction(addedList: addedList)
            }
        }

        @IBAction func subtractButtonPressed(sender: AnyObject) {
            if numberOfOrders.text == "0" {
                numberOfOrders.text = "0"
            } else {
                numberOfOrders.text = String((Int(numberOfOrders.text!)! - 1))
            }
        }

        func getOrders() -> Dictionary<String, Float> {
            return addedList
        }


        func configureCell(post: OrderModel) {
            self.post = post
            self.dishName.text = post.dishName
            self.dishDescriptionAndPrice.text = post.dishDescription
            self.numberOfOrders.text = "0"
        }

        }

最后在 View Controller 类中导入此委托(delegate)方法，就像导入 tableView 委托(delegate)和数据源一样。