//从storyboard手动加载一个新的视图控制器
-(void)tableView:(UITableView*)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath{
UINavigationController *navigationController = [self.storyboard instantiateViewControllerWithIdentifier:@"ListNavigationController"];
ListDetailViewController *controller = (ListDetailViewController*)navigationController.topViewController; controller.delegate = self;
Checklist *checklist = _lists[indexPath.row];
controller.checklistToEdit = checklist;
[self presentViewController:navigationController animated:YES completion:nil]; // 显示在桌面上
}
1.self.storyboard是不是为空
2.storyboard中vc的storyboad id有没设置对等等打个断点跟踪一下