根据:
- 适当的领域使用模式/最佳实践
- 什么是在多种视图中保持同步活动的最佳实践或设计模式
- 领域数据库Swift 3.1的设计模式-Singleton
我的方法就像:
appdelegate.swift
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
DispatchQueue.main.async {
let username = "test@test.com"
let password = "Test123"
let serverUrl = URL(string: "http://test.com:9080")
let realmUrl = URL(string: "realm://test.com:9080/~/realmtest")
if let user = SyncUser.current {
Realm.Configuration.defaultConfiguration.syncConfiguration = SyncConfiguration(user: user, realmURL: realmUrl!)
} else {
SyncUser.logIn(with: .usernamePassword(username: username, password: password, register: false), server: serverUrl!, onCompletion: { (user, error) in
guard let user = user else {
print("Error: (String(describing: error?.localizedDescription))")
return
}
Realm.Configuration.defaultConfiguration.syncConfiguration = SyncConfiguration(user: user, realmURL: realmUrl!)
})
}
}
return true
}
viewcontroller.swift
override func viewDidLoad() {
super.viewDidLoad()
print("SyncConfiguration: (String(describing: Realm.Configuration.defaultConfiguration.syncConfiguration))")
self.realm = try! Realm()
}
当我第一次打开应用程序时,什么也没发生,但是当我第二次打开应用程序时,领域工作正常。
每当我打开应用程序时,打印的SyncConfiguration
是nil
。没有错误!
在这里和那里搜索,找不到答案...
问题在于您使用异步方法来配置领域,但是您不会在方法的完成处理程序中调用打印件。您只有在您的异步呼叫完成后才出示您的ViewContoller。