Ios 核心数据删除对象崩溃应用程序，EXC\u访问错误

我正在从fetchResultsController加载一个用户对象，从该用户那里获取一组相关的站点对象，将它们放入数组，排序，然后在UITableView中显示

-(void)loadMainUser {

id <NSFetchedResultsSectionInfo> sectionInfo = [[self.fetchedResultsController sections] objectAtIndex:0];

if([sectionInfo numberOfObjects]) {

    NSUInteger indexArr[] = {0,0};
    NSIndexPath *indexSet = [NSIndexPath indexPathWithIndexes:indexArr length:2];
    mainUser = (User *)[self.fetchedResultsController objectAtIndexPath:indexSet];

    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"siteName" ascending:YES selector:@selector(caseInsensitiveCompare:)];
    NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:&sortDescriptor count:1];

    sortedMsgs = [[mainUser.sitesToUser allObjects] mutableCopy];
    [sortedMsgs sortUsingDescriptors:sortDescriptors];

    [sortDescriptor release];
    [sortDescriptors release];      
}

[self.theTableView reloadData];

}

我不太清楚为什么。。。我注意到我的主用户有一个保留计数3，我认为这是因为SorterDMSG和UITableView。。。是否因为我的UITableView仍然显示来自用户的数据，然后我将其删除？真的很困惑

以下是崩溃日志：

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000016
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Application Specific Information:
objc_msgSend() selector name: isTemporaryID
iPhone Simulator 235, iPhone OS 4.2 (iPhone/8C134)

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   libobjc.A.dylib                 0x01613a63 objc_msgSend + 23
1   CoreData                        0x00e20d26 -[NSManagedObjectContext save:] + 566
2   Clicky                          0x00002cfd -[RootViewController deleteUser] + 358 (RootViewController.m:71)
3   UIKit                           0x003eaa6e -[UIApplication sendAction:to:from:forEvent:] + 119
4   UIKit                           0x005f8167 -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 156
5   UIKit                           0x003eaa6e -[UIApplication sendAction:to:from:forEvent:] + 119
6   UIKit                           0x004791b5 -[UIControl sendAction:to:forEvent:] + 67

---

我在这一点上的唯一猜测是，您可能正在删除一个与另一个对象具有必需关系的对象。检查数据模型中的关系

---

完全是一种预感。

我现在唯一的猜测是，您可能正在删除一个与另一个对象具有必需关系的对象。检查数据模型中的关系

完全是一种预感

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000016
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Application Specific Information:
objc_msgSend() selector name: isTemporaryID
iPhone Simulator 235, iPhone OS 4.2 (iPhone/8C134)

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   libobjc.A.dylib                 0x01613a63 objc_msgSend + 23
1   CoreData                        0x00e20d26 -[NSManagedObjectContext save:] + 566
2   Clicky                          0x00002cfd -[RootViewController deleteUser] + 358 (RootViewController.m:71)
3   UIKit                           0x003eaa6e -[UIApplication sendAction:to:from:forEvent:] + 119
4   UIKit                           0x005f8167 -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 156
5   UIKit                           0x003eaa6e -[UIApplication sendAction:to:from:forEvent:] + 119
6   UIKit                           0x004791b5 -[UIControl sendAction:to:forEvent:] + 67