无不是寻找实体名称 'GroupMessageInfo'

Question

错误消息的法律NSPersistentStoreCoordinator：

persistentStoreCoordinator is nil ?? 
persistentStoreCoordinator is nil ?? 
persistentStoreCoordinator is nil ?? 
persistentStoreCoordinator is nil ?? 
persistentStoreCoordinator is nil ?? 
persistentStoreCoordinator is nil ?? 
persistentStoreCoordinator is nil ?? 
persistentStoreCoordinator is nil ?? 
persistentStoreCoordinator is nil ?? 
------------ persistentStoreCoordinator is nil ?? 

---

- (void)updateGroupTableStatus:(TmpGroupMessageInfo*)info { 

NSManagedObjectContext *ctx = [self createPrivateObjectContext]; 

[ctx performBlock:^{ 
    NSPredicate *cdt = [NSPredicate predicateWithFormat:@"groupId == %@ && tableId == %@", info.groupId, info.tableId]; 

    NSFetchRequest *fetchRequest = [GroupMessageInfo makeRequest:ctx predicate:cdt orderby:nil offset:0 limit:1]; 
    NSArray *array = [ctx executeFetchRequest:fetchRequest error:nil]; 
    if ([array count] > 0) { 
     for (GroupMessageInfo *msg in array) { 
      msg.lastingTime = [NSNumber numberWithLongLong:0]; 
     } 
     [ctx save:nil]; 
     [self.managedObjectContext performBlock:^{ 
      [self.managedObjectContext save:nil]; 
     }]; 
    } 
}]; 
} 

---

+ (NSFetchRequest*)makeRequest:(NSManagedObjectContext*)ctx predicate:(NSPredicate*)predicate orderby:(NSArray*)orders offset:(int)offset limit:(int)limit { 
NSString *className = [NSString stringWithUTF8String:object_getClassName(self)]; 
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; 
[fetchRequest setEntity:[NSEntityDescription entityForName:className inManagedObjectContext:ctx]]; 
if (predicate) { 
    [fetchRequest setPredicate:predicate]; 
} 
if (orders!=nil) { 
    [fetchRequest setSortDescriptors:orders]; 
} 
if (offset>0) { 
    [fetchRequest setFetchOffset:offset]; 
} 
if (limit>0) { 
    [fetchRequest setFetchLimit:limit]; 
} 
return fetchRequest;} 

---

- (NSManagedObjectContext*)createPrivateObjectContext { 
if (_privateManagedObjectContext == nil) { 
    _privateManagedObjectContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType]; 
    [_privateManagedObjectContext setParentContext:self.managedObjectContext]; 
} 

return _privateManagedObjectContext; 
    } 

---

- (NSManagedObjectContext *)managedObjectContext { 
    if (_managedObjectContext != nil) { 
     return _managedObjectContext; 
    } 

    NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator]; 
    if (coordinator != nil) { 
     _managedObjectContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSMainQueueConcurrencyType]; 
     [_managedObjectContext setPersistentStoreCoordinator:coordinator]; 
    } 
    return _managedObjectContext; 
} 

// Returns the managed object model for the application. 
// If the model doesn't already exist, it is created from the application's model. 
- (NSManagedObjectModel *)managedObjectModel { 
    if (_managedObjectModel != nil) { 
     return _managedObjectModel; 
    } 
    NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"PokerSkyModel" withExtension:@"momd"]; 
    _managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL]; 
    return _managedObjectModel; 
} 

// Returns the persistent store coordinator for the application. 
// If the coordinator doesn't already exist, it is created and the application's store added to it. 
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator { 
    if (_persistentStoreCoordinator != nil) { 
     return _persistentStoreCoordinator; 
    } 

    ...... 

    _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]]; 
    if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:optionsDictionary error:&error]) { 
     NSLog(@"Unresolved error %@, %@", error, [error userInfo]); 
     [self cleanData]; 
     abort(); 
    } 
    return _persistentStoreCoordinator; 
} 

Answer 1

我来到一个交叉一模一样的碰撞与你的。最后我发现初始化的persistentStoreCoordinator的NSManagedObjectContext不能被置于后台线程！

在你的情况，你做11号线的一些CoreData操作，这显然不是主线程。如果是你第一次访问您的CoreData，那么persistentStoreCoordinator将在您设定11号导致崩溃的后台线程。您还可以通过把这些代码appDidFinishLaunch在AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ 
     // your CoreData operation here 
    } 
    // ... 
} 

解决方案重现崩溃是很容易的，只要保证CoreData的初始化（或者你第一次使用它）应该在主线程。当它不是，使用GCD切换到它

dispatch_async(dispatch_get_main_queue(), 0), ^{ 
    // your CoreData initialize here 
}