swiftui - 无法在使用 SwiftUI 的 ForEach 循环中获取 @state 变量

Question

我想生成一个带有 ForEach 循环的输入 TextFields 列表。 textFields 显然是@State 变量。

我确实得到了错误:

Generic struct 'ForEach' requires that 'Binding' conform to 'Hashable'

这是我的代码:

struct ContentView: View {
    @State private var mainPrice = ""
    @State private var mainGrade = ""
    
    var body: some View {
        
        var inputFields = [$mainPrice,$mainGrade]
        
        HStack {
            List{
                ForEach(inputFields, id: \.self)  { value in   /// here is the error

                    TextField("Enter data", text: value)

                    }
                }
        }
       
    }

因此，我将绑定(bind)变量放在一个数组中，因为我需要在循环中使用绑定(bind)类型，也许这不是该怎么做？我试图将 Hashable 添加到 inputFields var 以响应错误消息，但我怀疑整个设置是错误的。

Answer 1

import SwiftUI

struct ContentView: View {
    @State private var mainPrice = ""
    @State private var mainGrade = ""
    
    var body: some View {
        
        let inputFields = [BindingWrapper(binding: $mainPrice), BindingWrapper(binding: $mainGrade)]
        
        HStack {
            List{
                ForEach(inputFields, id: \.uuid)  { value in   /// here is the error
                    TextField("Enter data", text: value.$binding)

                }
            }
        }
    }
}

struct BindingWrapper {
    let uuid: UUID = UUID()
    @Binding var binding: String
}