ios - 无法解决 "Type of expression is ambiguous without more context"错误。有人可以检查我的代码吗？

Question

我对 SwiftUI 比较陌生，时常会遇到错误并通过互联网搜索来解决它们，但这一次我找不到任何解决方案来解决我的问题，并决定在这里寻求一些帮助，堆栈溢出。我希望下面的代码可以帮助您找到我的问题。

我的两个结构都是可识别的，并且我实际上在同一 View 中使用了 ShoppingList 结构，以相同的技术创建了它的列表，并且它的工作没有错误。但是，当我尝试将 ForEach 用于 ShoppingList 结构的变量(这也是一个结构并符合可识别协议(protocol))时，我收到此错误“表达式类型在没有更多上下文的情况下不明确”

这是我得到错误的 View :

struct ListDetailView: View {
    @EnvironmentObject var session: SessionStore
    var item: ShoppingList
    @State private var isAddNewViewActive: Bool = false

    var body: some View {
        List {
            Section(header: Text("Products")) {
                ForEach(self.item.products, id: \.id) { product in <<<--- ERROR LINE
                        Text(product.name)
                    }
            }
            Section(header: Text("")) {
                Button(action: { self.isAddNewViewActive.toggle() } ) {
                    Text("Click to add new product")
                }
            }
        }
        .listStyle(GroupedListStyle())
        .navigationBarTitle(self.item.name)
        .sheet(isPresented: $isAddNewViewActive) {
            AddNewItemView(session: self.session, item: self.item, isViewActive: self.$isAddNewViewActive)
        }
    }
}

这些是代码中的结构

struct ShoppingList: Identifiable, Equatable {
    var id: UUID
    var name: String
    var coverPhoto: String
    var products: [Product]

    init(id: UUID = UUID(), name: String, coverPhoto: String = "cart", products: [Product] = [Product]()) {
        self.id = id
        self.name = name
        self.coverPhoto = coverPhoto
        self.products = products
    }

    mutating func addProduct(product: Product) {
        products.append(product)
        print(products)
    }

}

struct Product: Identifiable, Equatable {
    var id: UUID
    var name: String
    var brand: String
    var imageURL: String
    var links: [Int: String]
    var description: String

    init(id: UUID = UUID(), name: String, brand: String = "", imageURL: String = "", links: [Int: String] = [:], description: String = "") {
        self.id = id
        self.name = name
        self.brand = brand
        self.imageURL = imageURL
        self.description = description
        self.links = links
    }
}

提前感谢所有 StackOverflow 社区。

Answer 1

我正确遵守了 Equatable 协议(protocol)

struct ShoppingList: Identifiable, Equatable {
        static func == (lhs: ShoppingList, rhs: ShoppingList) -> Bool {
            return lhs.id == rhs.id && rhs.id == lhs.id
        }
        var id: UUID()
        ...
        init(name: String, brand: String = "", imageURL: String = "", links: [Int: String] = [:], description: String = "") {
            ...
        }
    }

无需初始化UUID，UUID()会自行生成