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Swift 3, Xcode 8, RealmSwift 2.0.2, Realm Object Server 1.0

In my app delegate, I have a function that sets my Realm configuration to connect to a remote sync server I have set up. I'm just using a test account to authenticate until I can get the basics of sync working. 1.1.1.1 isn't my real IP address. ;)

let username = "test"
let password = "test"

let address = "http://1.1.1.1:9080"
let syncAddress = "realm://1.1.1.1:9080/~/myapp"

SyncUser.authenticate(with: Credential.usernamePassword(username: username, password: password, actions: []), server: URL(string: address)!, onCompletion: { user, error in
    guard let user = user else {
      fatalError(String(describing: error))
    }

    // Open Realm
    Realm.Configuration.defaultConfiguration = Realm.Configuration(
      syncConfiguration: (user, URL(string: syncAddress)!)
    )
 })

This seems to work fine. I see data appear on my server, and I get no errors. My assumption is that setting the Realm configuration here means that all instances of Realm() will use this configuration.

I then set a realm object as a class property in two separate view controllers:

class TableViewControllerA: UITableViewController{
  let realm = try! Realm()
  override func viewDidLoad() {
    // CORRECT: Prints "nil" as it should for a remotely synced Realm instance
    print(realm.configuration.fileURL)
  }
}

...and another in another file:

class ViewControllerB: UIViewController{
  let realm = try! Realm()
  override func viewDidLoad() {
    // WRONG: Prints the path to the local realm file in the Simulator
    print(realm.configuration.fileURL) 
  }
}

As noted in the code comments above, the two instances of realm are different. On some of my view controllers, I can save objects to the server and see them appear on my device. On other view controllers, I don't see any data because it's using the wrong Realm database.

Can I not reliably expect a Realm configuration to persist throughout my app? Do I need to do something else to use the same configuration?

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1 回答 1

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您正在身份验证完成处理程序中设置默认配置。此回调在用户通过身份验证后异步调用。如果您的视图控制器子类之一的实例恰好在回调运行之前创建，则它打开的领域将使用默认的默认配置，在您对身份验证完成处理程序进行任何更改之前。

于 2016-10-08T06:36:18.400 回答