  TRY 0: self.myViewControllerObject = [[MyViewController alloc]initWithNibName:@"MyViewController" bundle:nil];   [self.navigationController pushViewController:self.myViewControllerObject animated:YES];  [self.myViewControllerObject release];  TRY 0: MyViewController *temp = [[MyViewController alloc]initWithNibName:@"MyViewController" bundle:nil];   