核心數據deleteObject與EXC_BAD_ACCESS崩潰的應用

我從我的fetchResultsController加載一個用戶對象，從所述用戶那裏得到一堆相關的Sites對象，將它們放入一個數組，排序，然後在UITableView中顯示。核心數據deleteObject與EXC_BAD_ACCESS崩潰的應用

-(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]; 

}

現在我的場景是我想刪除此用戶對象和相關網站。但是，每當我嘗試並保存刪除，我的應用程序崩潰與EXC_BAD_ACCESS錯誤。這裏是我的刪除代碼：

-(void)deleteUser { 

sortedMsgs = nil; 
mainUser = nil; 

NSUInteger indexArr[] = {0,0}; 
NSIndexPath *indexSet = [NSIndexPath indexPathWithIndexes:indexArr length:2]; 

NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext]; 

[context deleteObject:[self.fetchedResultsController objectAtIndexPath:indexSet]]; 
// Save the context. 

NSError *error = nil; 
if (![context save:&error]) {  
    NSLog(@"Unresolved error %@, %@", error, [error userInfo]); 
    abort(); 
} else {   
    // do something 
} 
}

我不完全知道爲什麼，但...我發現我的mainUser過的3擋計數我以爲是因爲sortedMsgs和UITableView中的...它因爲我的UITableView仍然顯示來自用戶的有效數據，然後我刪除它？真的很困惑......

這裏的崩潰日誌：

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

來源

2010-11-10 mootymoots

在這一點上我唯一的猜測是，您可能會被刪除具有對另一個對象的所需關係的對象。檢查數據模型中的關係？

完全是一種預感。

來源

2010-11-11 21:43:22 Chad

核心數據deleteObject與EXC_BAD_ACCESS崩潰的應用

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