[英]Using iCloud enabled Core Data NSArray-taking method
I've been setting up and testing Core Data in my app and everything works great locally; 我一直在我的应用程序中设置和测试Core Data,并且在本地一切正常。 however, as soon as I enable iCloud via: 但是,只要我通过以下方式启用iCloud:
NSDictionary *options;
if ([self iCloudEnabled]) {
options = @{NSSQLitePragmasOption: @{@"journal_mode" : @"DELETE"},
NSPersistentStoreUbiquitousContentNameKey : @"iCloudStore"};
[self subscribeToNotifications];
} else
options = @{NSSQLitePragmasOption: @{@"journal_mode" : @"DELETE"}};
And run my app, I get the following error spammed in the console: 并运行我的应用程序,我在控制台中收到以下错误消息:
*** ERROR: this process has called an NSArray-taking method, such as initWithArray:, and passed in an NSSet object. This is being worked-around for now, but will soon cause you grief.
When that error is done printing, everything seems to work normally. 打印完该错误后,一切似乎都可以正常工作。
The only other related questions I could find were here and here , and neither of them were helpful. 我能找到的唯一其他相关问题在这里和这里 ,都没有帮助。
I can't even find anywhere that says what that error means. 我什至找不到任何地方表明该错误的含义。
Any help is appreciated. 任何帮助表示赞赏。
EDIT: From what I've found it's happening after my managedObjectContext is initialized and before the "Using local storage: 0" is printed to the console. 编辑:从我发现它发生在我的ManagedObjectContext初始化之后和“使用本地存储:0”打印到控制台之前发生。 Problem is, I have no idea what's being executed in that time (because I'm not calling anything); 问题是,我不知道那段时间正在执行什么(因为我什么也没叫)。 it seems to be in a background thread. 它似乎在后台线程中。
EDIT2: I should also mention that this only happens the first time the app is launched (on the iCloud "one-time" setup). EDIT2:我还应该提到,这仅在应用程序首次启动时发生(在iCloud“一次性”设置上)。
EDIT3: Here's the code that initializes my context: EDIT3:这是初始化我的上下文的代码:
- (NSURL *)coreDataLocalURL {
// The directory the application uses to store the Core Data store file.
NSURL *result = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
result = [result URLByAppendingPathComponent:@"TheAnglersLog"];
NSError *e;
if (![[NSFileManager defaultManager] fileExistsAtPath:result.path])
// create TheAnglersLog directory if it doesn't exist
[[NSFileManager defaultManager] createDirectoryAtPath:result.path
withIntermediateDirectories:NO
attributes:nil
error:&e];
return result;
}
- (NSManagedObjectModel *)managedObjectModel {
// The managed object model for the application. It is a fatal error for the application not to be able to find and load its model.
if (_managedObjectModel != nil)
return _managedObjectModel;
NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"TheAnglersLog" withExtension:@"momd"];
_managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
return _managedObjectModel;
}
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {
// The persistent store coordinator for the application. This implementation creates and return a coordinator, having added the store for the application to it.
if (_persistentStoreCoordinator != nil) {
return _persistentStoreCoordinator;
}
// Create the coordinator and store
_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
NSURL *storeURL = [[self coreDataLocalURL] URLByAppendingPathComponent:@"TheAnglersLog.sqlite"];
NSError *error = nil;
NSString *failureReason = @"There was an error creating or loading the application's saved data.";
NSDictionary *options;
if ([self iCloudEnabled]) {
options = @{NSSQLitePragmasOption: @{@"journal_mode" : @"DELETE"},
NSPersistentStoreUbiquitousContentNameKey : @"TheAnglersLogCloudStore"};
[self subscribeToNotifications];
} else
options = @{NSSQLitePragmasOption: @{@"journal_mode" : @"DELETE"}};
NSLog(@"Is iCloud enabled? %@", [self iCloudEnabled] ? @"YES" : @"NO");
NSPersistentStore *store;
if (!(store = [_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:options error:&error])) {
// Report any errors we got.
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
dict[NSLocalizedDescriptionKey] = @"Failed to initialize the application's saved data";
dict[NSLocalizedFailureReasonErrorKey] = failureReason;
dict[NSUnderlyingErrorKey] = error;
error = [NSError errorWithDomain:@"YOUR_ERROR_DOMAIN" code:9999 userInfo:dict];
NSLog(@"Error in persistentStoreCoordinator: %@, %@", error, [error userInfo]);
}
NSLog(@"Core Data URL: %@", [store URL]);
return _persistentStoreCoordinator;
}
- (NSManagedObjectContext *)managedObjectContext {
// Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.)
if (_managedObjectContext != nil) {
return _managedObjectContext;
}
NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
if (!coordinator) {
return nil;
}
_managedObjectContext = [[NSManagedObjectContext alloc] init];
[_managedObjectContext setPersistentStoreCoordinator:coordinator];
return _managedObjectContext;
}
It's telling you precisely the problem: Somewhere (not in the code you posted), you're passing an NSSet
to something which expects an NSArray
. 它正好告诉您问题所在:在某个地方(不在您发布的代码中),您正在将NSSet
传递给需要NSArray
东西。 NSArray
is ordered and duplicate-inclusive, NSSet
is unordered and duplicate-exclusive. NSArray
是有序的且包含重复项, NSSet
是无序的且包含重复项。 It converted it to a set for you so it wouldn't crash, but is complaining it may not continue to do so in the future. 它为您将其转换为一个集,因此它不会崩溃,但抱怨它将来可能不会继续这样做。
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