CoreDataよりNSFetchRequestをsetReturnsDistinctResults:YES、setResultType:NSDictionaryResultTypeで取得した際に返り値であるNSDictionaryをNSManagedObjectに変換する方法

gistfile1.m

- (id)initWithDictionary:(NSDictionary *)dict managedContext:(NSManagedObjectContext *)context
{
    self = [super initWithEntity:[NSEntityDescription entityForName:[[self class] entityName] inManagedObjectContext:context] insertIntoManagedObjectContext:nil];
    
    if (self) {
        for (NSString *key in dict.allKeys) {
            [self setValue:dict[key] forKey:key];
        }
        
    }
    
    return self;
}

+ (NSString *)entityName
{
    return NSStringFromClass([self class]);
}