我一直在以下这些说明来帮助整合与CoreData iCloud的支持，我得到了一些错误。
我有这个在我的AppDelegate：
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {
if (persistentStoreCoordinator != nil) {
return persistentStoreCoordinator;
}
//NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"Little_Wedding_Book_Universal.sqlite"];
NSString *storePath = [[NSString stringWithFormat:@"%@", [self applicationDocumentsDirectory]] stringByAppendingPathComponent:@"appname.sqlite"];
NSURL *storeURL = [NSURL fileURLWithPath:storePath];
persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
NSPersistentStoreCoordinator* psc = persistentStoreCoordinator;
if (IOS_VERSION_GREATER_THAN_OR_EQUAL_TO(@"5.0"))
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSFileManager *fileManager = [NSFileManager defaultManager];
// Migrate datamodel
NSDictionary *options = nil;
// this needs to match the entitlements and provisioning profile
NSURL *cloudURL = [fileManager URLForUbiquityContainerIdentifier:@"J9VXW4WCE8.com.company.appname"];
NSString* coreDataCloudContent = [[cloudURL path] stringByAppendingPathComponent:@"data"];
if ([coreDataCloudContent length] != 0) {
// iCloud is available
cloudURL = [NSURL fileURLWithPath:coreDataCloudContent];
options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
[NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption,
@"appname.store", NSPersistentStoreUbiquitousContentNameKey,
cloudURL, NSPersistentStoreUbiquitousContentURLKey,
nil];
}
else
{
// iCloud is not available
options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
[NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption,
nil];
}
NSError *error = nil;
[psc lock];
if (![psc addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:options error:&error])
{
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
[psc unlock];
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"asynchronously added persistent store!");
[[NSNotificationCenter defaultCenter] postNotificationName:@"RefetchAllDatabaseData" object:self userInfo:nil];
});
});
}
else
{
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
[NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption,
nil];
NSError *error = nil;
if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:options error:&error])
{
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
}
return persistentStoreCoordinator;
}
在另一个视图控制器创建我的一个实例AppDelegate ，创建一个对象，并调用[appDelegate saveContext]; 这是应用程序崩溃。 这一直完美地工作（到现在为止，加入iCloud的支持）。
-(void)saveContext
{
NSError *error;
if (managedObjectContext != nil) {
if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) {
// Update to handle the error appropriately.
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
exit(-1); // Fail
}
}
}
所以它崩溃的这个方法，并在控制台给了我这样的信息：
'NSInternalInconsistencyException', reason: 'This NSPersistentStoreCoordinator has no persistent stores. It cannot perform a save operation.'
我不知道该怎么办，求助！
编辑：控制台下面登录：
在启动应用程序时，我得到：
2012-08-22 17:39:47.906 appname[24351:707] asynchronously added persistent store!
2012-08-22 17:39:47.955 appname[24351:707] asynchronously added persistent store!
随访时，应用程序崩溃与：
2012-08-22 17:41:31.657 appname[24351:707] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'This NSPersistentStoreCoordinator has no persistent stores. It cannot perform a save operation.'
*** First throw call stack:
(0x3749d88f 0x351a2259 0x36bf0fe7 0x36c59287 0xd648b 0x149e0b 0x373f73fd 0x3118ce07 0x3118cdc3 0x3118cda1 0x3118cb11 0x3118d449 0x3118b92b 0x3118b319 0x31171695 0x31170f3b 0x33bb322b 0x37471523 0x374714c5 0x37470313 0x373f34a5 0x373f336d 0x33bb2439 0x3119fcd5 0xd53dd 0xd5378)
terminate called throwing an exception(lldb)
