Core data 无法为类型“调用初始化器”；“N错误”；使用AppDelegate coredata中的（域、代码、用户信息），Swift 2

我也刚刚更新到Xcode 7，我在AppDelegate.swift中遇到了这个问题

 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("Inclinometer.sqlite")
    var error: NSError? = nil
    var failureReason = "There was an error creating or loading the application's saved data."


    let mOptions = [NSMigratePersistentStoresAutomaticallyOption: true,
        NSInferMappingModelAutomaticallyOption: true]
    do {
        try coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: mOptions)
    } catch var error1 as NSError {
        error = error1

        // Report any error we got.
        let dict = NSMutableDictionary()
        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 {
        fatalError()
    }

    return coordinator
}()

它显示在这行

error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)

---

无法使用类型为（域、代码、用户信息）的参数列表调用类型为“NSError”的初始化器。如何更改它以使其在Xcode 7中运行？

初始化器要求

userInfo

的参数类型为

[String:AnyObject]

。你必须这样写：

let dict : [String: AnyObject] = [
  NSLocalizedDescriptionKey: "Failed to initialize the application's saved data",
  NSLocalizedFailureReasonErrorKey : failureReason
  NSUnderlyingErrorKey : error
]

---

另外，我认为您不需要创建额外的错误变量（在何处定义？）并覆盖它。

似乎您必须特别明确地在XCode 7.0中放入字典中的内容，这对我很有用

let dict : [String: AnyObject] = [
        NSLocalizedDescriptionKey: "Failed to initialize the application’s saved data",
        NSLocalizedFailureReasonErrorKey: String(failureReason),
        NSUnderlyingErrorKey: String(error),
    ]
error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)

---

您好，现在通过这个“let dict:”，它显示了“表达式的类型在没有更多上下文的情况下是不明确的”。你的意思是我不需要定义“error=NSError（domain:“YOUR_error_domain”，code:9999，userInfo:dict）”？此外，我认为它不仅仅需要字符串。请参阅“NSError（域：，代码：，用户信息：）”在Xcode 7.0中不起作用（问题是关于这个问题的）。“I get”类型的表达式在没有更多上下文的情况下是不明确的