Propertly break down and pass data between views - swift

Question

So I'm still learning Swift and I wanted to cleanup some code and break down views, but I can't seem to figure out how to pass data between views, so I wanted to reach out and check with others.
So let's say that I have MainView() which previously had this:
struct MainView: View {
#ObservedObject var model: MainViewModel
if let item = model.selectedItem {
HStack(alignment: .center, spacing: 3) {
Text(item.title)
}
}
}
Now I created a SecondView() and changed the MainView() content to this:
struct MainView: View {
#ObservedObject var model: MainViewModel
if let item = model.selectedItem {
SecondView(item: item)
}
}
Inside SecondView(), how can I access the item data so that I can use item.title inside SecondView() now?

Answer 1

In order to pass item to SecondView, declare item as a let property and then when you call it with SecondView(item: item), SecondView can refer to item.title.
Here is a complete example expanding on your code:
import SwiftUI
struct Item {
let title = "Test Title"
}
class MainViewModel: ObservableObject {
#Published var selectedItem: Item? = Item()
}
struct MainView: View {
#ObservedObject var model: MainViewModel
var body: some View {
if let item = model.selectedItem {
SecondView(item: item)
}
}
}
struct SecondView: View {
let item: Item
var body: some View {
Text(item.title)
}
}
struct ContentView: View {
#StateObject private var model = MainViewModel()
var body: some View {
MainView(model: model)
}
}