在花了很多时间处理这个错误后，我来这里询问是否有人有关于此错误的信息。我加载了两个实体，一个Parks实体和一个GuidedTour实体。 Paks可以与许多GuidedTours相关，但当我尝试保存它时，错误会引发：
错误域= NSCocoaErrorDomain代码= 133020＆＃34;（null）＆＃34;的UserInfo = {conflictList =（ ＆＃34; NSMergeConflict（0x17026afc0）for NSManagedObject（0x1740d94b0）with objectID＆＃39; 0xd000000000240002＆＃39; with oldVersion = 0和newVersion = and old cached row = {\ n language = \＆＃34; de_DE \＆＃34 ;; \ n text = \＆＃34; Apapapapapa＆＃34; ...}
我无法理解错误，我的合并政策是：NSMergeByPropertyStoreTrumpMergePolicyType
我的代码：
AppDelegate appDelegate =（AppDelegate ）[[UIApplication sharedApplication] delegate]; self.context = [appDelegate managedObjectContext];
NSError *error = nil;
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"GuidedTours" inManagedObjectContext:self.context ];
[fetchRequest setEntity:entity];
NSArray *fetchedObjects = [self.context executeFetchRequest:fetchRequest error:&error];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"guided_tours_parks == NULL"];
fetchedObjects = [fetchedObjects filteredArrayUsingPredicate:predicate];
GuidedTours *tour = [fetchedObjects firstObject];
fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entityPark = [NSEntityDescription entityForName:@"Parks" inManagedObjectContext:self.context ];
[fetchRequest setEntity:entityPark];
fetchedObjects = [self.context executeFetchRequest:fetchRequest error:&error];
predicate = [NSPredicate predicateWithFormat:@"name == %@",[jsonData objectForKey:@"Park ID"] ];
fetchedObjects = [fetchedObjects filteredArrayUsingPredicate:predicate];
Parks *park = [fetchedObjects firstObject];
[tour setGuided_tours_parks:park];
[park addParks_guided_toursObject:tour];
// Save the object to persistent store
if (![self.context save:&error]) {
NSLog(@"Can't Save! %@ %@", error, [error localizedDescription]);
}
有人有什么想法吗？
谢谢！
答案 0 :(得分：0)
我也有同样的错误，在我的情况下，它是在尝试执行NSBatchDeleteRequest之后在插入项上发生的。问题是执行NSBatchDeleteRequest之后，我没有调用[self.context reset]方法。
根据WWDC 2015演讲，批量更新/删除会绕过上下文并直接修改持久性存储文件。因此，如果您不调用reset，则您的上下文将包含已删除的对象，这些对象可能导致您遇到上述合并冲突。