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我想這段代碼如何重裝將在覈心數據
- (void)insertNewObject: (NSArray *) userInfo // Заносит блюдо в локальную базу данных
{
for (int i = 0; i < userInfo.count; i++) {
billContent * bc = [userInfo objectAtIndex:i];
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
NSEntityDescription *entity = [[self.fetchedResultsController fetchRequest] entity];
NSManagedObject *nmo = [NSEntityDescription insertNewObjectForEntityForName:[entity name]
inManagedObjectContext:context];
[nmo setValue:CountID forKey:@"billId"];
[nmo setValue:bc.billAmount forKey:@"courseCount"];
[nmo setValue:bc.billCourseId forKey:@"courseId"];
[nmo setValue:bc.billPrice forKey:@"coursePrice"];
[nmo setValue:bc.billTitle forKey:@"courseTitle"];
[self saveContext];
}
}
- (void)saveContext {
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
NSError *error = nil;
if (![context save:&error]) {
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
}
插入在覈心數據的一些對象怎麼看這個物體在我的表視圖對象後表視圖?
我試圖從核心數據阿恩獲取,插入後,這段代碼
[self makeAList];
這裏
-(void) makeAList {
id <NSFetchedResultsSectionInfo> sectionInfo = [[self.fetchedResultsController sections] objectAtIndex:0];
for (int i = 0; i < [sectionInfo numberOfObjects]; i ++) {
NSIndexPath *ip = [NSIndexPath indexPathForRow: i inSection:0];
billContent *bc = [[billContent alloc] init];
NSManagedObject *mo = [self.fetchedResultsController objectAtIndexPath:ip];
bc.billId = [[mo valueForKey:@"billId"] description];
bc.billTitle = [[mo valueForKey:@"courseTitle"] description];
bc.billPrice = [[mo valueForKey:@"coursePrice"] description];
bc.billAmount = [[mo valueForKey:@"courseCount"] description];
bc.depId = [[mo valueForKey:@"departmentId"] description];
bc.billCourseId = [mo valueForKey:@"courseId"];
[saved addObject:bc];
}
[countView1 reloadData];
}
但沒有任何工程。但是,如果我脫離這個類,並再次輸入(加載viewDidLoad),我可以看到新的值,我做錯了什麼?
我有這樣的錯誤 錯誤:嚴重的應用程序錯誤。在調用-controllerDidChangeContent:期間,NSFetchedResultsController的委託捕獲到異常。無效更新:部分0中的行數無效。更新(6)後現有部分中包含的行數必須等於更新前(6)部分中包含的行數,加上或減去數字插入或從該部分刪除的行(插入1個,刪除0個)以及加上或減去移入或移出該部分的行數(移入0,移出0)。與userInfo(空) – Arthur
我已經做到了)))謝謝你的幫助) – Arthur
這太棒了! :) –