Realm Sync swift example - ios

Question

Hi all im trying to create an ios app that sync data using Realm Object server
but there is something im missing
i installed corretly Realm object server on my server (remote)
i can access the dashboard correctly
i can login with Syncuser
but i have problem syncing data.. when i open the app i login the user but after that ( im unable to sync anyting )
i searched online for a full example but without success
any one can suggest a simple and easy example for use realm sync with swift?
Thanks

Answer 1

This is my actual implementation for a chat app using RealmSwift. I used a model object called Message defined below:
class Message: Object {
dynamic var userId = ""
dynamic var name = ""
dynamic var text = ""
dynamic var dateCreated = NSDate()
}
Next I used created a controller for sending and sync messages:
// Instance variables
var messages: Results<Message>!
var token: NotificationToken!
var configuration: Realm.Configuration!
override func viewDidLoad() {
super.viewDidLoad()
// Your viewDidLoad implementation
self.setupRealm()
}
Next the setup methods for Realm. As mentioned in Real Documentation, if a Realm has read-only permissions, then you must use the asyncOpen API as described in Asynchronously Opening Realms. Opening a read-only Realm without asyncOpen will cause an error.
private func setupRealm() {
let serverURL = URL(string: "http://your.server.ip:9080")!
let credentials = SyncCredentials.usernamePassword(username: "example#mail.com", password: "password")
SyncUser.logIn(with: credentials, server: serverURL) { user, error in
if let user = user {
let syncURL = URL(string: "realm://your.server.ip:9080/~/Message")!
let syncConfig = SyncConfiguration(user: user, realmURL: syncURL)
self.configuration = Realm.Configuration(syncConfiguration: syncConfig)
self.setupDataSource()
} else if let error = error {
// handle error
debugPrint("error: \(error.localizedDescription)")
}
}
}
private func setupDataSource() {
Realm.asyncOpen(configuration: self.configuration) { realm, error in
if let realm = realm {
// Realm successfully opened, with all remote data available
self.messages = realm.objects(Message.self).sorted(byKeyPath: "dateCreated", ascending: true)
self.token = self.messages.addNotificationBlock({ (changes: RealmCollectionChange) in
debugPrint("Message update event")
self.collectionView.reloadData()
})
} else if let error = error {
// Handle error that occurred while opening or downloading the contents of the Realm
debugPrint("error: \(error.localizedDescription)")
}
}
}
deinit {
self.token?.stop()
}
Finally the sendMessage() method that I use to send the message:
func sendMessage(id: String, name: String, text: String) {
let message = Message()
message.userId = id
message.name = name
message.text = text
message.dateCreated = NSDate()
Realm.asyncOpen(configuration: self.configuration) { realm, error in
if let realm = realm {
// Realm successfully opened, with all remote data available
try! realm.write() {
realm.add(message)
}
} else if let error = error {
// Handle error that occurred while opening or downloading the contents of the Realm
debugPrint("error: \(error.localizedDescription)")
}
}
}
Hope it helps!
Bye!