怎么找到storyboard中定义的viewcontroller

Question

UIStoryboard*  sb = self.storyboard改成UIStoryboard*  sb = [UIStoryboard storyboardWithName:@"XXXX" bundle:nil];试试记住xxxx后面不要加扩展名

Answer 1

 // 3.跳到主界面
   [self performSegueWithIdentifier:@"About" sender:nil];
也可以这么调用，我程序里的一部分代码      Class c = NSClassFromString(item.className);
      UIViewController *vc = [[c alloc] init];
       nav = [[UINavigationController alloc] initWithRootViewController:vc];
       nav.modalPresentationStyle = UIModalPresentationFormSheet;
        [self presentViewController:nav animated:YES completion:nil];