Question

如何将数据从视图控制器传递到表视图控制器？以及如何将所选数据存储到表视图控制器？但是输出显示多行，如何根据用户在袋子上的点击使其显示？以及如何传递其中的数据？

! ] 2

这里是我的商品详细信息视图控制器

import UIKit


class ItemDetailViewController: UIViewController {

     var items = [item]()

    var name : String = ""
    var price : String = ""
    var imagee : String = ""

    @IBOutlet weak var labelname: UILabel!

    @IBOutlet weak var image: UIImageView!

    @IBOutlet weak var labelprice: UILabel!

//here the button to add to the table view

    @IBAction func addtobag(_ sender: Any) {

        let viewController = storyboard?.instantiateViewController(withIdentifier: "BagViewController") as? BagViewController
        viewController?.name = self.name
        viewController?.imagee = self.imagee
        viewController?.price = self.price

        viewController?.items = self.items
        navigationController?.pushViewController(viewController!, animated: true)

    }



    override func viewDidLoad() {
        super.viewDidLoad()

        labelname.text = name
        labelprice.text = price
        image.image = UIImage(named: imagee)

    }

}

这里是我的Bag View Controller

import UIKit

class BagViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {


    @IBOutlet weak var totalprice: UILabel!

    @IBOutlet weak var tableview: UITableView!
    var items = [item]()

    var name : String = ""
    var price : String = ""
    var imagee : String = ""

    override func viewDidLoad() {
        super.viewDidLoad()
        tableview.delegate = self
        tableview.dataSource = self


        // Do any additional setup after loading the view.
    }

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

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

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

        return cell
    }        
}

以及我的购物表视图

import UIKit

class ShoppingTableViewCell: UITableViewCell {    

    @IBOutlet weak var dfs: UIImageView!

    @IBOutlet weak var labelname: UILabel!

    @IBOutlet weak var labelprice: UILabel!

    @IBOutlet weak var stepperlabel: UILabel!


    override func awakeFromNib() {
        super.awakeFromNib()

    }

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

        // Configure the view for the selected state
    }


    @IBAction func stepper(_ sender: UIStepper) {
        stepperlabel.text = String(Int(sender.value))
    } 
}

Answer 1

我认为您的逻辑有点不好，您正在用代码实例化一个VC，但是您有一个问题，我建议您通过prepare函数传递数据：

// MARK: - Navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    // Get the new view controller using segue.destination.
    if let vc = segue.destination as? BagViewController {
        vc.name = self.name
        vc.imagee = self.imagee
        vc.price = self.price
        vc.items = self.items
    }

    // Pass the selected object to the new view controller.
}

然后在您的 addtobag IBAction中，您将调用segue，我建议您使用基于字符串的segue扩展名String+PerformSegue.swift，它可以让您轻松地在给定的ViewController中执行segue，如下所示：

@IBAction func addtobag(_ sender: Any) {
    "nameOfTheSegue".performSegue(on: self)
    // If you don't want to use String+PerformSegue.swift uncomment      
    // the next line and comment the last one.
    // self.performSegue(withIdentifier: "nameOfTheSegue", sender: nil)
}

如何将数据从视图控制器传递到表视图控制器？

1 个答案: