您知道如何与两个拥有相同.sqlite读写权限的应用程序（您是所有者）共享核心数据吗？
我尝试使用应用程序组：
1）Bank.xcdatamodeld BankInfo.swift BankDetails.swift
我已将这些文件复制到该应用程序B的项目的目录中（从应用程序A的项目中检索），然后将它们拖到Xcode中。
2）我已经从应用程序组的通用沙箱中检索了sqlite文件
应用程序委托：核心数据堆栈[Swift]
lazy var applicationDocumentsDirectory: NSURL = {
let urls = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
return urls[urls.count-1] as NSURL
}()
lazy var managedObjectModel: NSManagedObjectModel = {
let modelURL = NSBundle.mainBundle().URLForResource("shareapps", withExtension: "momd")!
return NSManagedObjectModel(contentsOfURL: modelURL)!
}()
lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator? = {
// Create the coordinator and store
var coordinator: NSPersistentStoreCoordinator? = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
let directory = NSFileManager.defaultManager().containerURLForSecurityApplicationGroupIdentifier("com.sd.shareapps");
let url = directory?.URLByAppendingPathComponent("shareapps.sqlite")
//Sarting frehs every time
NSFileManager.defaultManager().removeItemAtURL(url!, error: nil)
var error: NSError? = nil
var failureReason = "There was an error creating or loading the application's saved data."
if coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil, error: &error) == nil {
coordinator = nil
// 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()
}
println("\(coordinator?.persistentStores)")
return coordinator
}()
lazy var managedObjectContext: NSManagedObjectContext? = {
let coordinator = self.persistentStoreCoordinator
if coordinator == nil {
return nil
}
var managedObjectContext = NSManagedObjectContext()
managedObjectContext.persistentStoreCoordinator = coordinator
return managedObjectContext
}()
我收到此错误消息：
"*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+entityForName: nil is not a legal NSPersistentStoreCoordinator for searching for entity name 'Entity'"
问候
错误讯息
"*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+entityForName: nil is not a legal NSPersistentStoreCoordinator for searching for entity name 'Entity'"
给出了回答这个问题的关键。错误消息的措辞与极为相似，is not a legal NSManagedObjectContext...在类似的问题+ entityForName中得到了回答：nil不是搜索实体名称'Account'的合法NSManagedObjectContext参数。
因此，尽管该错误信息是在两种情况下隐藏的，在这种情况下，错误消息意味着你逝去的地方在你的代码nil的NSPersistentStoreCoordinator。设置断点应有助于确定位置。通过对您的代码进行以下修改，我能够重现相同的错误：
lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator? = {
// normally we would initialize the persistentStoreCoordinator here
// but to reproduce an error, just return nil
return nil;
}
lazy var managedObjectContext: NSManagedObjectContext? = {
let coordinator = self.persistentStoreCoordinator
// normally, we would return nil right away if there is
// no coordinator, but to reproduce the error carry on anyway
// if coordinator == nil {
// return nil
// }
var managedObjectContext = NSManagedObjectContext()
managedObjectContext.persistentStoreCoordinator = coordinator
return managedObjectContext
}()
对于任何其他阅读此答案的人，请注意，除非我们对Core Data做一些有用的事情，否则将永远不会使用Core Data堆栈（不会初始化惰性变量）。在为重现此错误消息而创建的示例应用程序中，我只是将Core Data堆栈保留在原处（Xcode模板将其放在App Delegate中），然后尝试在didFinishLaunchingWithOptions内创建一个实体：
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
var context : NSManagedObjectContext? = self.managedObjectContext
// the line below will cause an exception when the
// NSPersistentStoreCoordinator is nil
var entity : NSEntityDescription? = NSEntityDescription.entityForName("Entity",
inManagedObjectContext:context!)
return true
}
请注意，原始帖子中提供的代码没有引起任何错误。可能是发布的问题中的代码与项目中使用的实际代码不匹配，或者可能是应用程序中的其他地方，存在一个使用nil持久存储协调器创建的托管对象上下文。无论如何，已解密的错误消息。
您可能希望确保已正确设置共享应用程序组。请参阅本文（http://jasoncross-ios-development.blogspot.com/2015/04/accessing-shared-data-between-ios.html），其中涉及使用权利设置共享应用程序组。
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我来说两句