为什么这个 ForEach 循环不断导致错误？

Question

我遇到了这个 ForEach 循环的问题。我试图让它循环遍历一个数组，但它一直给出一个未知错误，显示 'Failed to produce diagnostic for expression; please submit a bug report and include the project'。当我删除 ForEach 循环时，错误消失了。

这是出现错误的文件

struct ReceiptView: View {

let item: ItemsStruct

var body: some View {
    VStack {
        
        // Header
        HStack {
            VStack(alignment: .leading) {
                Text(item.company)
                    .font(.title2)
                    .fontWeight(.semibold)
                Text(item.date)
                    .font(.caption)
            }
            Spacer()
            Menu {
                Text("Menu Item 1")
                Text("Menu Item 2")
                Text("Menu Item 3")
            } label: {
                Image(systemName: "ellipsis.circle")
                    .scaleEffect(1.2)
            }
        }.padding()
        
        
        // FIXME: This ForEach is causing an error
        ForEach(item.products) { prod in
            Text(prod.product)
        }

    }
}

}

这是 ItemsStruct：

public struct ItemsStruct: Identifiable {
    public let id = UUID()
    let company: String
    let date: String
    let total: String
    let products: [itemsArray]

    struct itemsArray {
        let product: String
        let quantity: Int
        let totalPrice: Double
    }

}

对导致此错误的原因有任何想法吗？

Answer 1

你需要另一个可识别的

public struct ItemsStruct: Identifiable {
    
    public let id: UUID = UUID()
    let company: String
    let date: String
    let total: String
    let products: [ItemsArray]
    
}

struct ItemsArray: Identifiable {
    
    let id: UUID = UUID()          // <<: Here!
    let product: String
    let quantity: Int
    let totalPrice: Double
    
}

为什么这个 ForEach 循环不断导致错误？

Why does this ForEach loop keep causing an error?

swift

swiftui

swiftui-foreach