无法将数据从一个视图控制器传递到另一个

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英文:

I can not pass data from one View Controller to another

问题

I will only translate the non-code parts of your text, as you requested:

"Could you help me with my code. I can not pass ma data on prepare segue. // cannot assign value of type Response to type Meals. I don't know what I do wrong. I just need a help with line prepare for segue. It is a last line of code. Will be glad for any help. thank you!

Please check it here."

英文:

Could you help me with my code. I can not pass ma data on prepare segue. // cannot assign value of type Response to type Meals. I don't know what I do wrong. I just need a help with line prepare for segue. It is a last line of code. Will be glad for any help. thank you!

struct Response: Codable {
var meals: [Meals]?

}

struct Meals: Codable {
var strMeal: String?
var strMealThumb: String?
var idMeal: String?

}

class MealsViewController: UIViewController {

//var results: Response?

var meals : Meals = Meals()

@IBOutlet weak var mealImage: UIImageView!
@IBOutlet weak var nameLbl: UILabel!
@IBOutlet weak var idLbl: UILabel!

override func viewDidLoad() {
    super.viewDidLoad()
   
    nameLbl.text = meals.strMeal
    idLbl.text = meals.idMeal
   
}

class ViewController: UIViewController {

@IBOutlet weak var tableView: UITableView!

var resultsData: Response?

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    
    
    getResultData {
        DispatchQueue.main.async {
            self.tableView.reloadData()
        }
     }
    
    tableView.delegate = self
    tableView.dataSource = self
    
}

}

extension ViewController: UITableViewDelegate, UITableViewDataSource {
    

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    resultsData?.meals?.count ?? 0
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = UITableViewCell(style: .subtitle, reuseIdentifier: nil)
    let meal = resultsData?.meals
    cell.textLabel?.text = meal![indexPath.row].strMeal
    
    return cell
}

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        performSegue(withIdentifier: "showDetails", sender: self)
    }
    
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if let destination = segue.destination as? MealsViewController {
           destination.meals = resultsData // cannot assign value of type Response to type Meals
        }
    }

Please check it here.

答案1

得分: 1

你的 meals 应该在 viewDidLoad 外部声明。

应该如下所示。

class MealsViewController: UIViewController {
    
    var meals: Meals = Meals()
    
    override func viewDidLoad() {
        super.viewDidLoad()
    
        print("你的餐名是==\(meals.strMeal ?? "")")
    }
}
英文:

Your meals should be outside the viewDidLoad

It should be as below.

class MealsViewController : UIViewController {

    var meals : Meals = Meals()

    override func viewDidLoad() {
         super.viewDidLoad()

         print("your meal name is==\(meals.strMeal ?? "")")
    }

}

huangapple
  • 本文由 发表于 2023年3月12日 12:51:54
  • 转载请务必保留本文链接:https://go.coder-hub.com/75711105.html
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