NSManagedObjectIDs數組，一次獲取對象

Question

我有一個NSManagedObjectID數組。有沒有一種更有效的方式來獲取關聯的託管對象，而不是循環訪問數組並單獨獲取它們？

Answer 1

具有以下謂詞

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self in %@", arrayOfIds]; 

完整的示例，多數民衆贊成正是我一直在尋找執行fetchRequest

NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; 
fetchRequest.entity = myEntityDescription; 

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self in %@", arrayOfIds]; 

fetchRequest.predicate = predicate; 
fetchRequest.sortDescriptors = mySortDescriptors; 

NSError *error = nil; 
NSArray *managedObjects = [self.managedObjectContext executeFetchRequest:fetchRequest error:&error]; 
[fetchRequest release]; fetchRequest = nil;