How to automatically update information changed in Firestore

Question

I have this code to display username that was stored in Firestore when signing up:

 func displayUserName(){ let db = Firestore.firestore() if let uid = user?.uid{ db.collection("PROFILE").document(uid).getDocument { (snap, err) in guard let data = snap else {return} let firstname = data.get("firstName") as! String self.firstName = firstname } } }

but, when I change the name in Firestore, I need to relaunch the app so it can update. is it possible to update this name without needing to relaunch the app?

I don't know about switf, but uou should be able to get so called snapshot that you can listen for changes. getDocument() gets document once — O-9
– O-9, Commented Dec 13, 2020 at 14:14
Thank you, worked flawlessly. Just answered my question. Cheers — Mateus Neves
– Mateus Neves, Commented Dec 13, 2020 at 14:41

Mateus Neves · Accepted Answer · 2020-12-13 14:42:28Z

Based on the comment given, I just changed getDocuments for addSnapshotListener

db.collection("PROFILE").document(uid).addSnapshotListener { (documentSnapshot, error) in guard let datas = documentSnapshot else {return} let firstname = datas.get("firstName") as! String self.firstName = firstname }

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