Question

我有一个Down代码，该代码在ForEach循环中制作了一些Text，该循环使用（int：.self）Int，但是在这种情况下，我们生成的（id = UUID（））将被忽略！而且ForEach可以使用一些内部Int编号！我们如何强制ForEach将我们构建的UUID用作ID？

    struct Data: Identifiable
{
    let id  = UUID()
    var name: String
}

let Data1 = Data(name: "Data 1")
let Data2 = Data(name: "Data 2")
let Data3 = Data(name: "Data 3")
let Data4 = Data(name: "Data 4")

class DataModel: ObservableObject
{
    @Published var items: [Data] = [Data1, Data2, Data3, Data4]
}



struct ContentView: View
{
    
    @StateObject var dataModel = DataModel()
    
    var body: some View
    {
        
        ForEach(dataModel.items.indices, id: \.self) { index in // ← Here: I want UUID 
            
            Text(dataModel.items[index].name)
                .font(.title2)
                .padding()
            
            
        }
    }
}

Answer 1

您可以尝试以下方法：

ForEach(dataModel.items.map{ $0.id }, id: \.self) { uuid in // ← Here: I want UUID

Answer 2

您可以按照How do you use .enumerated() with ForEach in SwiftUI?所述使用zip

ForEach(Array(zip(dataModel.items.indices, dataModel.items)), id: \.1) { index, item in
  // index and item are both safe to use here
}

我们如何强制ForEach使用UUID代替（id：\ .self）？

2 个答案: