当在我的ForEach中单击时，我正试图将每个单独的项目按钮从购物车图标更改为不同的图标。但当我点击一个按钮时，每个按钮的图标都会改变。我该怎么解决这个问题？
非常感谢
@StateObject var vm = ShopViewModel()
@State var isShowing = false
@State var cartItemCount = 0
@State var itemCart = false
var body: some View {
NavigationView {
ScrollView(/*@START_MENU_TOKEN@*/.vertical/*@END_MENU_TOKEN@*/, showsIndicators: false) {
VStack {
ForEach(vm.foods) { food in
HStack {
NavigationLink(
destination: DetailView(foody: food, isCanceled: $isShowing),
label: {
Image(food.imageURL)
.resizable()
.frame(width: /*@START_MENU_TOKEN@*/100/*@END_MENU_TOKEN@*/, height: /*@START_MENU_TOKEN@*/100/*@END_MENU_TOKEN@*/)
Text(food.name)
.bold()
Spacer()
Text("$(food.price)").padding()
}).foregroundColor(.black)
Spacer()
Button(action: {
cartItemCount += 1
}, label: {
Image(systemName: "cart")
.frame(width: 70, height: 50)
.background(Color("yColor"))
.cornerRadius(30)
}).padding(.trailing, 30)
}.padding(.leading, 20)
}
}.padding(.top, 30)
}
.navigationTitle("Falco Shop")
.navigationBarItems(trailing: CartIcon(cartItemCount: $cartItemCount).padding(.top, 90).padding())
}
}
以下是如何做到这一点的示例：
import SwiftUI
struct ContentView: View {
@StateObject var vm = ShopViewModel()
@State var isShowing = false
@State var cartItemCount = 0
@State var itemCart = false
var body: some View {
NavigationView {
ScrollView(.vertical, showsIndicators: false) {
VStack {
ForEach(vm.foods.indices, id:.self) { index in
HStack {
Text(vm.foods[index].name)
Spacer()
Button(action: {
cartItemCount += 1
vm.foods[index].selected.toggle()
}, label: {
Image(systemName: vm.foods[index].selected ? "cart.fill" : "cart")
.frame(width: 70, height: 50)
.background(Color("yColor"))
.cornerRadius(30)
}).padding(.trailing, 30)
}.padding(.leading, 20)
}
}.padding(.top, 30)
}
.navigationTitle("Falco Shop")
}
}
}
class ShopViewModel: ObservableObject {
@Published var foods: [Food] = [Food(name: "apple", price: 2.0, selected: false, imageURL: "apple")]
}
struct Food: Identifiable {
let id: UUID = UUID()
var name: String
var price: Double
var selected: Bool
var imageURL: String
}