How to append to a struct from another file? - swift

Question

I am trying to append to a struct from another file. I can do so, and it works in one file, but when I try to connect the second, it doesn't work.
I am trying to implement a checkout feature, and right now, I need to at least be able to append items to the cart.
currentOrderLogic.swift
struct Cart: Hashable, Identifiable {
let id = UUID()
var product_name: String
var product_cost: String
}
public struct CurrentOrder: View {
#State var items = [Cart]()
func addObject(product_name: String, product_cost: String) {
items.append(Cart(product_name: product_name, product_cost: product_cost))
}
public var body: some View {
ScrollView(.vertical) {
VStack(alignment: .center) {
Text("Current Order".uppercased()).font(.system(size: 30))
.frame(height:50)
ForEach(items, id: \.self) { item in
HStack{
Text(item.product_name)
Text(item.product_cost)
}
}
Spacer()
Button("Charge $0.00") {
addObject(product_name: "Aooke", product_cost: "6")
}
}
}
}
}
When I press the button, it is added and shown in the list.
Now, I am trying to have items that they can click, and when it is clicked, the item is added to the current order.
homeMenu.swift
struct homeMenuObject: View {
#State var posts: [Post] = []
let date = Date()
var body: some View {
VStack {
HStack {
Text(date, style: .date)
Text(date, style: .time)
}
WrappingHStack(posts, id: \.self){ item in
VStack {
HStack {
Image("Logo").resizable().frame(width: 110, height: 55)
}
HStack {
Text(item.title)
}
HStack {
Text((item.body).uppercased())
.font(.headline)
}
}.frame(width: 110, height: 140).background(Color.white).onTapGesture {
CurrentOrder().addObject(product_name: "Aooke", product_cost: "6")
}
}.onAppear {
Api().getPosts { (posts) in
self.posts = posts
}
}
Spacer()
}
}
}
But when CurrentOrder().addObject(product_name: "Aooke", product_cost: "6") is called, nothing happens. How can I fix this?

Answer 1

Using ObservedObjects, I figured this out MYSELF.
currentOrderLogic.swift
public struct CurrentOrder: View {
#ObservedObject var cartSystem : CartSystem
public var body: some View {
ScrollView(.vertical) {
VStack(alignment: .center) {
Text("Current Order".uppercased()).font(.system(size: 30))
.frame(height:50)
ForEach(cartSystem.items, id: \.self) { item in
HStack{
Text(item.product_name)
Text(item.product_cost)
}
}
Spacer()
Button("Charge $0.00") {
cartSystem.addObject(product_name: "Aooke", product_cost: "6")
}
}
}
}
}
homeMenu.swift
struct homeMenuObject: View {
#State var posts: [Post] = []
#ObservedObject var cartSystem : CartSystem
let date = Date()
var body: some View {
VStack {
HStack {
Text(date, style: .date)
Text(date, style: .time)
}
WrappingHStack(posts, id: \.self){ item in
VStack {
HStack {
Image("Logo").resizable().frame(width: 110, height: 55)
}
HStack {
Text(item.title)
}
HStack {
Text((item.body).uppercased())
.font(.headline)
}
}.frame(width: 110, height: 140).background(Color.white).onTapGesture {
cartSystem.addObject(product_name: "Aooke", product_cost: "6")
}
}.onAppear {
Api().getPosts { (posts) in
self.posts = posts
}
}
Spacer()
}
}
}
Then, in your main ContentView, I put this outside of the ContentView Structure,
class CartSystem: ObservableObject {
#Published var items = [Cart]()
func addObject(product_name: String, product_cost: String) {
self.items.append(Cart(product_name: product_name, product_cost: product_cost))
}
struct Cart: Hashable, Identifiable {
let id = UUID()
var product_name: String
var product_cost: String
}
}
Then I put this inside the ContentView struct
#StateObject var cartSystem : CartSystem = CartSystem()
Then, when I call the CurrentOrder struct and the HomeMenu struct, you pass this cartSystem variable in. This makes all of the CartSystem's the same, so you are not creating new instances of them and makes them connected.
Now i need to make the homeMenu objects pass their respective data into the order