Pass global variable to #State in view - swiftui

Question

I have a global variable public var Role = "" so I can access it anywhere in the app. (Even though global variables are an ugly way to write code, I am decently new to SwiftUI and don't know how to change it to work with a multiview app.)
I also have a view as follows:
struct LoadingView: View {
#State var isLoaded = false
var body: some View {
if isLoaded {
Text("Data has loaded")
} else {
ProgressView()
}
}
}
I need a way to test for when Role != "" and then set isLoaded = true.

Answer 1

One way you can do this is to first wrap the role into a ObservableObject, then you can pass it as a environmentObject from the root, and let other subviews subscribe to any changes it makes through View.onReceive.
Wrapping the role into an ObservableObject:
class Role: ObservableObject {
#Published var role = ""
}
Passing role from the root:
struct MyApp: App {
let role = Role()
var body: some Scene {
WindowGroup {
ContentView()
.environmentObject(role)
}
}
}
LoadingView listens to changed made to role:
struct LoadingView: View {
#EnvironmentObject var role: Role
#State var isLoaded = false
var body: some View {
Group {
if isLoaded {
Text("Data has loaded")
} else {
ProgressView()
}
}
.onReceive(role.$role) { newRole in
isLoaded = (newRole != "")
}
}
}
Another view that can modify the role:
struct ChangeRoleView: View {
#EnvironmentObject var role: Role
var body: some View {
TextField("Role", text: $role.role)
.textFieldStyle(.roundedBorder)
.padding()
}
}
Your ContentView:
struct ContentView: View {
var body: some View {
VStack {
ChangeRoleView()
LoadingView()
}
}
}