如何在swiftUI中将文本旁边的颜色添加到列表中？（数据流）

我尝试从用户那里获取（文本和颜色），并将它们添加到SwiftUI中的列表中。我已经可以传递文本数据，但不幸的是，对于颜色，我不能传递，因为它们应该是相同的，下面有一个应用程序的图像。要工作，我们应该为PreAddTextField提供绑定。感谢您的帮助 这是我的密码：

import SwiftUI

struct AddListView: View {


@Binding var showAddListView : Bool
@ObservedObject var appState : AppState
@StateObject private var viewModel = AddListViewViewModel()

var body: some View {
    ZStack {
        
        Title(addItem: { viewModel.textItemsToAdd.append(.init(text: "", color: .purple)) })
        
        VStack {
            ScrollView {
                ForEach(viewModel.textItemsToAdd, id: \.id) { item in //note this is id: 

\.id and not \.self
                        PreAddTextField(textInTextField: viewModel.bindingForId(id: item.id), colorPickerColor: <#Binding<Color>#>)
                }
                
            }
        }
        .padding()
        .offset(y: 40)
        
        Buttons(showAddListView: $showAddListView, save: {
                        viewModel.saveToAppState(appState: appState)
                    })
        
    }
    .frame(width: 300, height: 200)
    .background(Color.white)
    .shadow(color: Color.black.opacity(0.3), radius: 10, x: 0, y: 10)
}
}

struct SwiftUIView_Previews: PreviewProvider {
    static var previews: some View {
        AddListView(showAddListView: .constant(false),appState: AppState())
    }
}

struct PreAddTextField: View {


@Binding var textInTextField : String
@Binding var colorPickerColor :  Color

var body: some View {
    HStack {
        TextField("Enter text", text: $textInTextField)
        ColorPicker("", selection: $colorPickerColor)
    }
}
}

struct Buttons: View {
    @Binding var showAddListView : Bool
    var save : () -> Void
    var body: some View {
        VStack {
            HStack(spacing:100) {
                Button(action: {
                        showAddListView = false}) {
                    Text("Cancel")
                }
                Button(action: {
                    showAddListView = false
                    // What should happen here to add Text to List???
                    save()
                }) {
                    Text("Add")
                }
            }
        }
        .offset(y: 70)
    }
}

struct Title: View {

var addItem : () -> Void

var body: some View {
    VStack {
        HStack {
            Text("Add Text to list")
                .font(.title2)
            Spacer()
            Button(action: {
                addItem()
            }) {
                Image(systemName: "plus")
                    .font(.title2)
            }
        }
        .padding()
        Spacer()
    }
}
}

---

您可以为整个

Text1

项创建

绑定，而不是仅对
字符串使用
绑定
：

class AddListViewViewModel : ObservableObject {
    @Published var textItemsToAdd : [Text1] = [.init(text: "", color: .purple)]
    
    func saveToAppState(appState: AppState) {
        appState.textData.append(contentsOf: textItemsToAdd.filter { !$0.text.isEmpty })
    }
    
    func bindingForId(id: UUID) -> Binding<Text1> { //now returns a Text1
        .init { () -> Text1 in
            self.textItemsToAdd.first(where: { $0.id == id }) ?? Text1(text: "", color: .clear)
        } set: { (newValue) in
            self.textItemsToAdd = self.textItemsToAdd.map {
                guard $0.id == id else {
                    return $0
                }
                return newValue
            }
        }
    }
}

struct PreAddTextField: View {
    @Binding var item : Text1
    
    var body: some View {
        HStack {
            TextField("Enter text", text: $item.text) //gets the text property of the binding
            ColorPicker("", selection: $item.color) //gets the color property
        }
    }
}

struct AddListView: View {
    @Binding var showAddListView : Bool
    @ObservedObject var appState : AppState
    @StateObject private var viewModel = AddListViewViewModel()
    
    var body: some View {
        ZStack {
            Title(addItem: { viewModel.textItemsToAdd.append(.init(text: "", color: .purple)) })
            VStack {
                ScrollView {
                    ForEach(viewModel.textItemsToAdd, id: \.id) { item in
                        PreAddTextField(item: viewModel.bindingForId(id: item.id)) //parameter is changed here
                    }
                }
            }
            .padding()
            .offset(y: 40)
            
            Buttons(showAddListView: $showAddListView, save: {
                viewModel.saveToAppState(appState: appState)
            })
            
        }
        .frame(width: 300, height: 200)
        .background(Color.white)
        .shadow(color: Color.black.opacity(0.3), radius: 10, x: 0, y: 10)
    }
}

class AddListViewModel:ObserveObject{
@已发布的变量textItemsToAdd:[Text1]=[.init（文本：，颜色：。紫色）]
func saveToAppState（appState:appState）{
appState.textData.append（contentsOf:textItemsToAdd.filter{！$0.text.isEmpty}）
}
func bindingForId（id:UUID）->Binding{//现在返回一个Text1
.init{（）->Text1在
self.textItemsToAdd.first（其中：{$0.id==id}）？？Text1（文本：，颜色：。清除）
}集合：{（newValue）在
self.textItemsToAdd=self.textItemsToAdd.map{
guard$0.id==id else{
返回$0
}
返回新值
}
}
}
}
结构PreAddTextField:视图{
@绑定变量项：Text1
var body：一些观点{
HStack{
TextField（“entertext”，text:$item.text）//获取绑定的text属性
ColorPicker（“，selection:$item.color）//获取颜色属性
}
}
}
结构AddListView:视图{
@绑定变量showAddListView:Bool
@ObservedObject变量appState:appState
@StateObject私有变量viewModel=addListViewModel（）
var body：一些观点{
ZStack{
标题（addItem:{viewModel.textItemsToAdd.append（.init（文本：“”，颜色：。紫色））}）
VStack{
滚动视图{
ForEach（viewModel.textItemsToAdd，id:\.id）{item in
PreAddTextField（item:viewModel.bindingForId（id:item.id））//参数在此处更改
}
}
}
.padding（）
.偏移量（y:40）
按钮（showAddListView:$showAddListView，保存：{
viewModel.saveToAppState（appState:appState）
})
}
.框架（宽：300，高：200）
.背景（颜色.白色）
阴影（颜色：颜色。黑色。不透明度（0.3），半径：10，x:0，y:10）
}
}
谢谢您的帮助
import SwiftUI

struct ListView: View {

@StateObject var appState = AppState() //store the AppState here
@State private var showAddListView = false

var body: some View {
    NavigationView {
        VStack {
            ZStack {
                List(appState.textData, id : \.self){ text in
                    HStack {
                        Image(systemName: "square")
                            .foregroundColor(text.color)
                        Text(text.text)
                    }
                                        
                                    }
                if showAddListView {
                                        AddListView(showAddListView: $showAddListView, appState: appState)
                                            .offset(y:-100)
                                    }
            }
        }
        .navigationTitle("List")
        .navigationBarItems(trailing:
                                Button(action: {showAddListView = true}) {
                                    Image(systemName: "plus")
                                        .font(.title2)
                                }
        )
    }
}
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ListView()
    }
}

class AddListViewViewModel : ObservableObject {
    @Published var textItemsToAdd : [Text1] = [.init(text: "", color: .purple)]
    
    func saveToAppState(appState: AppState) {
        appState.textData.append(contentsOf: textItemsToAdd.filter { !$0.text.isEmpty })
    }
    
    func bindingForId(id: UUID) -> Binding<Text1> { //now returns a Text1
        .init { () -> Text1 in
            self.textItemsToAdd.first(where: { $0.id == id }) ?? Text1(text: "", color: .clear)
        } set: { (newValue) in
            self.textItemsToAdd = self.textItemsToAdd.map {
                guard $0.id == id else {
                    return $0
                }
                return newValue
            }
        }
    }
}

struct PreAddTextField: View {
    @Binding var item : Text1
    
    var body: some View {
        HStack {
            TextField("Enter text", text: $item.text) //gets the text property of the binding
            ColorPicker("", selection: $item.color) //gets the color property
        }
    }
}

struct AddListView: View {
    @Binding var showAddListView : Bool
    @ObservedObject var appState : AppState
    @StateObject private var viewModel = AddListViewViewModel()
    
    var body: some View {
        ZStack {
            Title(addItem: { viewModel.textItemsToAdd.append(.init(text: "", color: .purple)) })
            VStack {
                ScrollView {
                    ForEach(viewModel.textItemsToAdd, id: \.id) { item in
                        PreAddTextField(item: viewModel.bindingForId(id: item.id)) //parameter is changed here
                    }
                }
            }
            .padding()
            .offset(y: 40)
            
            Buttons(showAddListView: $showAddListView, save: {
                viewModel.saveToAppState(appState: appState)
            })
            
        }
        .frame(width: 300, height: 200)
        .background(Color.white)
        .shadow(color: Color.black.opacity(0.3), radius: 10, x: 0, y: 10)
    }
}