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首页 > 解决方案 > 如何解析从 UITableViewCell 到主视图控制器的值（步进器）？

ios - 如何解析从 UITableViewCell 到主视图控制器的值（步进器）？

问题描述

我有一个UITableViewCell和一个UIViewController。在UITableViewCell我有一个步进器。当用户单击步进器将值发送到主视图控制器并在我的表格视图单元格中接收它时，我该如何做到这一点？

我试图从单元格中的步进器获取值，但它不起作用。我的代码如下。

第一个：UITableViewCell

import UIKit
import HCSStarRatingView
import GMStepper

class FoodsSecoundTableViewCell: UITableViewCell {
    @IBOutlet weak var foodTitle: UILabel!
    @IBOutlet weak var foodPrice: UILabel!
    @IBOutlet weak var foodRating: HCSStarRatingView!
    @IBOutlet weak var foodImage: UIImageView!
    @IBOutlet weak var steperCount: GMStepper!
    var result : Double?

    override func awakeFromNib() {
        super.awakeFromNib()
        print(steperCount.value) // this line has print the value just one time
    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)
    }

    @IBAction func myStepper(_ sender: Any) { // its a function         
    }

}

二：主视图控制器

import UIKit

class FoodsViewController: UIViewController , UITableViewDataSource {

    var foods = [Foods]()

    @IBOutlet weak var myTable: UITableView!

    override func viewDidLoad() {
        super.viewDidLoad()

        foods = [Foods(name: "myData", price: 15, count: 0, description: "myData", time: "20 - 30 min", rating: 4, image: #imageLiteral(resourceName: "chick")),
             Foods(name: "myData", price: 30, count: 0,description: "myData", time: "20 - 30 min", rating: 5, image: #imageLiteral(resourceName: "chick")),
             Foods(name: "myData", price: 20,count: 0,description: "myData", time: "20 - 30 min", rating: 3, image: #imageLiteral(resourceName: "chick")),
             Foods(name: "myData", price: 40,count: 0, description: "myData", time: "20 - 30 min", rating: 5, image: #imageLiteral(resourceName: "chick")),
             Foods(name: "myData", price: 55, count: 0,description: "myData", time: "20 - 30 min", rating: 4, image: #imageLiteral(resourceName: "chick"))
        ]

        myTable.rowHeight = 171
        myTable.dataSource = self
    }

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

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let food = foods[indexPath.row]
        let cell = tableView.dequeueReusableCell(withIdentifier: "foods")  as! FoodsSecoundTableViewCell
        cell.foodImage.image = food.image
        cell.foodPrice.text = String(food.price)
        print(cell.steperCount.value) // the result hear : its print just for one time

        cell.foodTitle.text = food.name
        cell.foodRating.value = CGFloat(food.rating)
        return cell
    }
}

标签： iosswiftxcodeuitableview

解决方案

您可以查看GMStepper的示例代码。

在FoodsViewController中，当您创建单元格时，将回调添加到steperCount

cell.steperCount.addTarget(self, action: #selector(FoodsViewController.stepperValueChanged), for: .valueChanged)

添加回调函数：

@objc func stepperValueChanged(stepper: GMStepper) {
    print(stepper.value, terminator: "")
}

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