ect = [NSEntityDescription insertNewObjectForEntityForName:@”MyEntity” inManagedObjectContext:context];
[object setValue:@”value1″ forKey:@”field1″];
[object setValue:@42 forKey:@”field2″];
// … set other fields …
[context save:nil];
// 從Core Data中檢索對象
NSFetchRequest* request = [NSFetchRequest fetchRequestWithEntityName:@”MyEntity”];
request.predicate = …;
NSArray* results = [context executeFetchRequest:request error:nil];
for (NSManagedObject* object in results) {
NSString* field1 = [object valueForKey:@”field1″];
NSNumber* field2 = [object valueForKey:@”field2″];
