核心数据：严重应用程序错误 [英] Core data: Serious application error
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问题描述
我完成了我的核心数据应用程序，我开始了最后的测试。
Everyfing工作正常，除非一件事，发生随机
b $ b
2011-07-03 20：27：53.144 MYAPP [1882：707] - [__ NSCFType controllerWillChangeContent：]：无法识别的选择器发送到实例0x4a4c490
2011-07-03 20：27：53.149 MYAPP [1882：707]严重的应用程序错误。在核心数据更改处理期间捕获异常。这通常是NSManagedObjectContextObjectsDidChangeNotification的观察器中的错误。 - [__ NSCFType controllerWillChangeContent：]：无法识别的选择器发送到实例0x4a4c490 with userInfo（null）
2011-07-03 20：27：53.165 MYAPP [1882：707] CoreAnimation：忽略异常： - [__ NSCFType controllerWillChangeContent：]：无法识别的选择器发送到实例0x4a4c490
在此崩溃：
$ b b
NSManagedObjectContext * context = [（AppDelegate *）[[UIApplication sharedApplication] delegate] managedObjectContext]; // IT'S OK
NSManagedObject * newManagedObject = [NSEntityDescription insertNewObjectForEntityForName：@KontrahentinManagedObjectContext：context]; // It's OK
for（NSString * key in kontrahent）[newManagedObject setValue：[kontrahent valueForKey：key] forKey：key]; // It's OK
NSError * error = nil;
if（！[context save：& error]）{// IT'S NOT OK
NSLog（@Unresolved error％@，％@，error，[error userInfo]）;
abort（）;
}
我的操作层次结构：
1。打开应用程序
2.打开我的'根'列表（使用NSFetchedResultsController，entity：Faktura）
3.点击添加按钮
4.在我的'添加'另一个对象（实体：Kontrahent）
5.我尝试将其添加到数据库
6.崩溃/它不。
SCHEME：
+ --- [moc save：] ---> Faktury（我的根类）
| ↓
+ ----- delegate-- FakturaCreator< --- [moc save：] - +& - --- ---这里是
↓|
KontrahentCreator --- delegate --- +
我知道它与 NSFetchedResultsController 和 [moc save：] 。但我找不到我的问题，因为它崩溃，当它想要。有时它工作，有时它崩溃。如果您知道这个问题，请帮助我：）
如果您需要更多代码...
NSFetchedResultsController stuff （Faktury.m）
#pragma mark - 获取结果控制器
- （NSFetchedResultsController *）fetchedResultsController {
if（__fetchedResultsController！= nil） return __fetchedResultsController;
//设置表
NSFetchRequest * fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription * entity = [NSEntityDescription entityForName：@FakturainManagedObjectContext：self.managedObjectContext];
[fetchRequest setEntity：entity];
//设置排序描述符
NSSortDescriptor * sortDescriptor = [[NSSortDescriptor alloc] initWithKey：@NumerFVascending：YES];
NSArray * sortDescriptors = [[NSArray alloc] initWithObjects：sortDescriptor，nil];
[fetchRequest setSortDescriptors：sortDescriptors];
//创建获取结果控制器
NSFetchedResultsController * aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest：fetchRequest managedObjectContext：self.managedObjectContext sectionNameKeyPath：nil cacheName：@Root] ;
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
[aFetchedResultsController release];
[fetchRequest release];
[sortDescriptor release];
[sortDescriptors release];
NSError * error = nil;
if（！[self.fetchedResultsController performFetch：& error]）{
UIAlertView * alert = [[UIAlertView alloc] initWithTitle：@BłądKrytycznymessage：@Wystąpiłnieznanybłąd przy zmienianiuzawartościw bazie danych。Dla dobra twoich danych prosimyniezwłoczniewyjśćz aplikacji ispróbowaćponownie。 delegate：self cancelButtonTitle：@OKotherButtonTitles：nil];
[alert show];
[alert release];
NSLog（@未解决的错误％@，％@，错误，[错误userInfo]）;
abort（）;
}
return __fetchedResultsController;
}
#pragma mark - 获取结果控制器委托
- （void）controllerWillChangeContent：（NSFetchedResultsController *）controller {
[tableView beginUpdates]; （NSFetchedResultsSectionInfo>）sectionInfo
atIndex：（NSUInteger）sectionIndex forChangeType：（NSFetchedResultsChangeType）type（NSFetchedResultsChangeType）（NSFetchedResultsChangeType） {
switch（type）{
case NSFetchedResultsChangeInsert：
[tableView insertSections：[NSIndexSet indexSetWithIndex：sectionIndex] withRowAnimation：UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete：
[tableView deleteSections：[NSIndexSet indexSetWithIndex：sectionIndex] withRowAnimation：UITableViewRowAnimationFade];
break;
}
}
- （void）controller：（NSFetchedResultsController *）controller didChangeObject：（id）anObject atIndexPath：（NSIndexPath *）indexPath
forChangeType： ）type newIndexPath：（NSIndexPath *）newIndexPath {
if（[[[sections] objectAtIndex：0] numberOfObjects] == 0）{
emptySectionView.hidden = NO;
UIBarButtonItem * editBtn = [[UIBarButtonItem alloc] initWithTitle：@Edytujstyle：UIBarButtonItemStyleBordered target：self action：@selector（toogleEditing）];
editBtn.enabled = NO;
[self.navigationItem setLeftBarButtonItem：editBtn animated：NO];
[editBtn release];
} else {
emptySectionView.hidden = YES;
self.navigationItem.leftBarButtonItem.enabled = YES;
}
UITableView * table = tableView;
switch（type）{
case NSFetchedResultsChangeInsert：
[table insertRowsAtIndexPaths：[NSArray arrayWithObject：newIndexPath] withRowAnimation：UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete：
[table deleteRowsAtIndexPaths：[NSArray arrayWithObject：indexPath] withRowAnimation：UITableViewRowAnimationLeft];
break;
case NSFetchedResultsChangeUpdate：
[self configureCell：（KSTableViewCell *）[table cellForRowAtIndexPath：indexPath] atIndexPath：indexPath];
break;
case NSFetchedResultsChangeMove：
[table deleteRowsAtIndexPaths：[NSArray arrayWithObject：indexPath] withRowAnimation：UITableViewRowAnimationFade];
[table insertRowsAtIndexPaths：[NSArray arrayWithObject：newIndexPath] withRowAnimation：UITableViewRowAnimationFade];
break;
}
}
- （void）controllerDidChangeContent：（NSFetchedResultsController *）controller {
[tableView endUpdates];
}
当我点击添加按钮 Faktury.m）
- （void）add：
FakturaCreator * form = [[FakturaCreator alloc] init];
form.hidesBottomBarWhenPushed = YES;
form.delegate = self;
form.managedObjectContext = self.managedObjectContext;
[self.navigationController pushViewController：form animated：YES];
[form release];
}
解决方案
。我有一个'KontrahentPicker'，它也有 NSFetchedResultsController 。但是这个 UIViewController 被表示为 modalViewController 。我抓住了我的 Kontrahent 和modal被驳回并释放。
我已经解决了我的问题：
self.fetchedResultsController.delegate = nil;方法中的<
>
I'm finishing my Core Data app ans I started my final testing.
Everyfing works fine, except one thing, that happens randomly and I can't reproduce it.
Here is the log (with NSZombieEnabled):
2011-07-03 20:27:53.144 MYAPP[1882:707] -[__NSCFType controllerWillChangeContent:]: unrecognized selector sent to instance 0x4a4c490
2011-07-03 20:27:53.149 MYAPP[1882:707] Serious application error. Exception was caught during Core Data change processing. This is usually a bug within an observer of NSManagedObjectContextObjectsDidChangeNotification. -[__NSCFType controllerWillChangeContent:]: unrecognized selector sent to instance 0x4a4c490 with userInfo (null)
2011-07-03 20:27:53.165 MYAPP[1882:707] CoreAnimation: ignoring exception: -[__NSCFType controllerWillChangeContent:]: unrecognized selector sent to instance 0x4a4c490
It crashes here:
NSManagedObjectContext *context = [(AppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext]; // IT'S OK
NSManagedObject *newManagedObject = [NSEntityDescription insertNewObjectForEntityForName:@"Kontrahent" inManagedObjectContext:context]; // IT'S OK
for(NSString *key in kontrahent) [newManagedObject setValue:[kontrahent valueForKey:key] forKey:key]; // IT'S OK
NSError *error = nil;
if (![context save:&error]) { // IT'S NOT OK
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
My action hierarchy:
1. Open application
2. Open my 'root' list (with NSFetchedResultsController, entity: "Faktura")
3. Tap 'Add' button
4. In my 'Add' view controller I create another object (entity: "Kontrahent")
5. I try to add it to database
6. It crashes / It doesn't.
SCHEME:
+---[moc save:]---> Faktury (my root class)
| ↓
+-----delegate-- FakturaCreator <---[moc save:]--+ <--- HERE IT CRASHES
↓ |
KontrahentCreator ---delegate---+
I know that it's connected with NSFetchedResultsController and [moc save:]. But I can't locate my problem, because it crashes when it wants. Sometimes it works, sometimes it crashes. If you know something abou this problem, please help me :)
IF YOU NEED MORE CODE...
NSFetchedResultsController stuff (Faktury.m)
#pragma mark - Fetched results controller
- (NSFetchedResultsController *)fetchedResultsController {
if (__fetchedResultsController != nil) return __fetchedResultsController;
// Setup the table
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Faktura" inManagedObjectContext:self.managedObjectContext];
[fetchRequest setEntity:entity];
// Setup the sort descriptors
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"NumerFV" ascending:YES];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Create the fetched results controller
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:@"Root"];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
[aFetchedResultsController release];
[fetchRequest release];
[sortDescriptor release];
[sortDescriptors release];
NSError *error = nil;
if (![self.fetchedResultsController performFetch:&error]) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Błąd Krytyczny" message:@"Wystąpił nieznany błąd przy zmienianiu zawartości w bazie danych. Dla dobra twoich danych prosimy niezwłocznie wyjść z aplikacji i spróbować ponownie." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
[alert release];
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
return __fetchedResultsController;
}
#pragma mark - Fetched results controller delegate
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller {
[tableView beginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type {
switch(type) {
case NSFetchedResultsChangeInsert:
[tableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[tableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath *)indexPath
forChangeType:(NSFetchedResultsChangeType)type newIndexPath:(NSIndexPath *)newIndexPath {
if([[[controller sections] objectAtIndex:0] numberOfObjects] == 0) {
emptySectionView.hidden = NO;
UIBarButtonItem *editBtn = [[UIBarButtonItem alloc] initWithTitle:@"Edytuj" style:UIBarButtonItemStyleBordered target:self action:@selector(toogleEditing)];
editBtn.enabled = NO;
[self.navigationItem setLeftBarButtonItem:editBtn animated:NO];
[editBtn release];
} else {
emptySectionView.hidden = YES;
self.navigationItem.leftBarButtonItem.enabled = YES;
}
UITableView *table = tableView;
switch(type) {
case NSFetchedResultsChangeInsert:
[table insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[table deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationLeft];
break;
case NSFetchedResultsChangeUpdate:
[self configureCell:(KSTableViewCell *)[table cellForRowAtIndexPath:indexPath] atIndexPath:indexPath];
break;
case NSFetchedResultsChangeMove:
[table deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[table insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath]withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller {
[tableView endUpdates];
}
When I tap the add button (Faktury.m)
- (void)add:(id)sender {
FakturaCreator *form = [[FakturaCreator alloc] init];
form.hidesBottomBarWhenPushed = YES;
form.delegate = self;
form.managedObjectContext = self.managedObjectContext;
[self.navigationController pushViewController:form animated:YES];
[form release];
}
解决方案
OK, I located my problem. I have a 'KontrahentPicker' and it has NSFetchedResultsController too. But this UIViewController was presented as modalViewController. I pucked my Kontrahent and modal was dismissed and released. But NSFRC's delegate was still active.
I solved my problem by putting
self.fetchedResultsController.delegate = nil;
in -dealloc method.
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