Swift 2在调用中额外的参数“错误”

您好我正在更新我的项目从Swift Swift2与Xcode 7,我得到这个CoreData错误:

Extra argument 'error' in call 

在这一行

 if coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil, error: &error) == nil { 

编辑

这是我的代码:

 lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator? = { // The persistent store coordinator for the application. This implementation creates and return a coordinator, having added the store for the application to it. This property is optional since there are legitimate error conditions that could cause the creation of the store to fail. // Create the coordinator and store var coordinator: NSPersistentStoreCoordinator? = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel) let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("Xipe_Tech.sqlite") var error: NSError? = nil var failureReason = "There was an error creating or loading the application's saved data." do { try coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil) coordinator = nil // Report any error we got. var dict = [String: AnyObject]() dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data" dict[NSLocalizedFailureReasonErrorKey] = failureReason dict[NSUnderlyingErrorKey] = error error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict) // Replace this with code to handle the error appropriately. // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. NSLog("Unresolved error \(error), \(error!.userInfo)") abort() } catch let error as NSError { print(error.localizedDescription) } return coordinator }() 

现在我在第一行得到错误我怎么能解决? 谢谢

Swift 2现在提供了一个try / catch机制,而Cocoa API已经被重写,而不是用传统的Objective C方式返回错误。

你现在应该这样做:

 do { try coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil) } catch let error as NSError { print(error.localizedDescription) } 

任何有这个问题的人只是在下面使用这个。 我遇到过同样的问题。 苹果公司取代原来的“如果协调员!.addPersistentStoreWithType”一个做尝试赶上短语。

 do { try coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil) } catch { // Report any error we got. var dict = [String: AnyObject]() dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data" dict[NSLocalizedFailureReasonErrorKey] = failureReason dict[NSUnderlyingErrorKey] = error as NSError let wrappedError = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict) // Replace this with code to handle the error appropriately. // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. NSLog("Unresolved error \(wrappedError), \(wrappedError.userInfo)") abort() } return coordinator }()