How to listen for realtime updates using FirebaseFirestore within SwiftUI app.
What you're looking for is called a snapshot listener. Effectively it's treated the same as with any other documents but it has a closure that allows you to respond to updated events on a particular document. It's general usage is this.
db.collection("cities").document("SF")
.addSnapshotListener { documentSnapshot, error in
guard let document = documentSnapshot else {
print("Error fetching document: \(error!)")
return
}
guard let data = document.data() else {
print("Document data was empty.")
return
}
print("Current data: \(data)")
}
You should be able to look at the document snapshot to determine any changes in data, then respond to those changes. In your case you would reload the view.
https://firebase.google.com/docs/firestore/query-data/listen