iOS开发：读取Plist数组元素并传值至ViewController展示菜品信息

Hey there! Let's fix this step by step to get your restaurant menu data showing up correctly in the RestaurantViewController when a collection view cell is tapped.

First, Let's Clean Up Data Handling with Models #

Instead of relying on NSMutableArray (which is Objective-C-era code), let's define Swift structs to model your data. This makes it way easier to work with and avoids messy dictionary access.

// Define a model for individual menu items
struct MenuItem {
    let name: String
    let price: String // Use Double instead if your plist stores numeric prices
}

// Define a model for restaurants
struct Restaurant {
    let name: String
    let menuItems: [MenuItem]
}

Next, Load and Parse the Plist Properly #

Load your plist once (not every time a cell is tapped!) and convert it into our [Restaurant] array. Add this method to your collection view controller:

private func loadRestaurants() -> [Restaurant] {
    // Get the plist path safely
    guard let plistPath = Bundle.main.path(forResource: "ResturantFile", ofType: "plist"),
          // Load raw data as an array of dictionaries
          let rawRestaurantData = NSArray(contentsOfFile: plistPath) as? [[String: Any]] else {
        print("Failed to load or parse the RestaurantFile.plist")
        return []
    }
    
    var restaurants = [Restaurant]()
    
    for rawRestaurant in rawRestaurantData {
        // Extract the restaurant name (the only key in each dictionary)
        guard let restaurantName = rawRestaurant.keys.first,
              // Extract the menu items array for this restaurant
              let rawMenuItems = rawRestaurant[restaurantName] as? [[String: String]] else {
            continue // Skip invalid entries
        }
        
        // Convert raw menu items to our MenuItem model
        let menuItems = rawMenuItems.compactMap { itemDict in
            guard let itemName = itemDict["itemName"],
                  let itemPrice = itemDict["ItemPrice"] else {
                return nil // Skip items missing name/price
            }
            return MenuItem(name: itemName, price: itemPrice)
        }
        
        restaurants.append(Restaurant(name: restaurantName, menuItems: menuItems))
    }
    
    return restaurants
}

Then load this array in viewDidLoad so it's ready to use:

var restaurants: [Restaurant] = []
var restaurantImageArray: [UIImage] = [] // Your existing image array

override func viewDidLoad() {
    super.viewDidLoad()
    restaurants = loadRestaurants()
    // Other setup code for your collection view
}

Fix the didSelectItemAt Method #

Your original code had a broken sorting line and was reloading the plist every tap. Let's replace it with logic that grabs the selected restaurant's data and passes it to RestaurantViewController:

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    // Get the selected restaurant from our preloaded array
    let selectedRestaurant = restaurants[indexPath.row]
    let selectedImage = restaurantImageArray[indexPath.row]
    
    // Option 1: Use your existing closure to pass data
    blockClosure?(selectedImage, selectedRestaurant.name, selectedRestaurant.menuItems)
    
    // Option 2: If you're using navigation to push the VC directly (instead of closure)
    let restaurantVC = RestaurantViewController()
    restaurantVC.restaurantImage = selectedImage
    restaurantVC.restaurantName = selectedRestaurant.name
    restaurantVC.menuItems = selectedRestaurant.menuItems
    navigationController?.pushViewController(restaurantVC, animated: true)
}

Set Up RestaurantViewController to Display the Data #

Update your RestaurantViewController to accept the data and populate the table view:

class RestaurantViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
    // Properties to receive data
    var restaurantImage: UIImage?
    var restaurantName: String?
    var menuItems: [MenuItem] = []
    
    @IBOutlet weak var tableView: UITableView!
    @IBOutlet weak var restaurantImageView: UIImageView!
    @IBOutlet weak var restaurantNameLabel: UILabel!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Configure table view
        tableView.dataSource = self
        tableView.delegate = self
        
        // Set up UI with received data
        restaurantImageView.image = restaurantImage
        restaurantNameLabel.text = restaurantName
        title = restaurantName
    }
    
    // MARK: - UITableView Data Source
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return menuItems.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "MenuItemCell", for: indexPath)
        let item = menuItems[indexPath.row]
        
        // Configure cell labels (adjust based on your cell's structure)
        cell.textLabel?.text = item.name
        cell.detailTextLabel?.text = item.price
        
        return cell
    }
}

Key Fixes from Your Original Code #

• No more repeated plist loads: We load the data once in viewDidLoad instead of every time a cell is tapped.
• Broken sorting logic removed: Your original sorted(by: {$0 == "ItemName"}) was incorrect because it tried to compare array elements to a string instead of sorting menu items properly (our model handles this cleanly).
• Type-safe data passing: Using structs ensures we're passing valid, typed data instead of ambiguous Any objects.

内容的提问来源于stack exchange，提问作者Gurjit Singh