I wanted to write a template for apps that logs into firebase so that I can use it in future projects. I followed a tutorial online found on YouTube : https://www.youtube.com/watch?v=DotGrYBfCuQ&list=PLBn01m5Vbs4B79bOmI3FL_MFxjXVuDrma&index=2
So the issue I'm facing is that in the video the variable userInfo was instantiated in the SceneDelegate, allowing the coder on YouTube to reference userInfo in his code. I tried doing the same in the AppDelegate and the App Struct. with no avail.
Here is the code in the App Struct:
import SwiftUI
import Firebase
@main
struct WoobApp: App {
// Adapts AppDelegate to SwiftUI
@UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
var userInfo = UserInfo()
var body: some Scene {
WindowGroup {
InitialView()
}
}
}
class AppDelegate : NSObject, UIApplicationDelegate {
// Configure Firebase When App Launches
func application(_ application : UIApplication, didFinishLaunchingWithOptions launchOptions : [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
FirebaseApp.configure()
return true
}
}
I think the issue is in here, however I will post the rest of my code in case Im wrong:
InitialView:
struct InitialView: View {
@EnvironmentObject var userInfo : UserInfo
var body: some View {
Group {
if userInfo.isUserAuthenticated == .undefined {
UndefinedView()
}
else if userInfo.isUserAuthenticated == .signedOut {
UndefinedView()
}
else if userInfo.isUserAuthenticated == .signedIn {
UndefinedView()
}
}
.onAppear{
self.userInfo.configureFirebaseStateDidChange()
}
}
And here is the User data :
class UserInfo : ObservableObject {
enum FBAuthState {
case undefined, signedIn, signedOut
}
@Published var isUserAuthenticated : FBAuthState = .undefined
func configureFirebaseStateDidChange() {
isUserAuthenticated = .signedIn
isUserAuthenticated = .signedOut
}
}
Thanks in advance for any help, Id really appreciate it so thank you!!!!
You have to actually pass that userInfo
variable into your view hierarchy so that it's visible to InitialView and its children:
@ObservedObject var userInfo = UserInfo()
var body: some Scene {
WindowGroup {
InitialView()
.environmentObject(userInfo)
}
}
This principal of passing it via environmentObject
is true whether you're using the SwiftUI lifecycle or a SceneDelegate
. More reading on environmentObject
: https://www.hackingwithswift.com/quick-start/swiftui/how-to-use-environmentobject-to-share-data-between-views
You have a choice of whether to declare userInfo
as an ObservedObject
or StateObject
that may depend on your OS target version: What is the difference between ObservedObject and StateObject in SwiftUI