ios - 放松到 HomeViewController 的正确方法？不平衡误差

Question

我有一个应用程序，我一直在与明显糟糕的教程作斗争，并且在之前的线程中撕毁了一个新的教程，所以有点担心再次发布。抱歉，我一直都是边做边学。

无论如何，我的登录、注册和其他功能都运行良好。我只是在使用 AVFoundation 进行条码扫描时遇到了困难。我设置我的流程去

_{(来源:leaguelaunch.com)}

按钮单击 HomeViewController 以在扫描后转到 BarcodeViewController，它会推送到 ScanResultsViewController。

ScanResultsViewController 将发送 JSON 发布数据并呈现响应，但由于我收到的错误，我这里什么都没有。我在这里只有这段代码可以直接展开到 HomeViewController，而不必先推回 (BarcodeView) 然后再推回 (HomeView)

- (void)viewDidLoad
{
    [super viewDidLoad];
    UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStyleBordered target:self action:@selector(back)];
    self.navigationItem.hidesBackButton = YES;
    self.navigationItem.leftBarButtonItem = item;
    NSLog(@"Made it to Success!!!");
}

-(void)back{
    [self performSegueWithIdentifier:@"unwindToHomeResult" sender:self];
}

如您所见，它会起作用，但在我收到错误之前它可能会起作用一次，也可能会起作用 10 次。

2014-05-25 12:11:32.378 selfcheckin[3344:60b] QR Code = {"stop_id":"3","event_id":"1"}
2014-05-25 12:11:32.801 selfcheckin[3344:60b] StopReading Called
2014-05-25 12:11:32.812 selfcheckin[3344:60b] Made it to Success!!!
2014-05-25 12:11:42.615 selfcheckin[3344:60b] QR Code = {"stop_id":"3","event_id":"1"}
2014-05-25 12:11:43.322 selfcheckin[3344:60b] StopReading Called
2014-05-25 12:11:43.334 selfcheckin[3344:60b] Made it to Success!!!
2014-05-25 12:11:50.850 selfcheckin[3344:60b] QR Code = {"stop_id":"3","event_id":"1"}
2014-05-25 12:11:51.296 selfcheckin[3344:60b] StopReading Called
2014-05-25 12:11:51.308 selfcheckin[3344:60b] Made it to Success!!!
2014-05-25 12:11:51.349 selfcheckin[3344:60b] QR Code = {"stop_id":"3","event_id":"1"}
2014-05-25 12:11:51.352 selfcheckin[3344:60b] StopReading Called
2014-05-25 12:11:51.370 selfcheckin[3344:60b] nested push animation can result in corrupted navigation bar
2014-05-25 12:11:51.759 selfcheckin[3344:60b] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.
2014-05-25 12:11:51.851 selfcheckin[3344:60b] Unbalanced calls to begin/end appearance transitions for <ScanResultsViewController: 0x14e86570>.

所以我的主要问题是如何从 ResultsView 返回到 HomeView。我很想取消 NavigationController，看看我是否可以不用它。关于我可能出错的地方或正确方法的任何指示

谢谢

Answer 1

您可以通过在导航 Controller 上使用 popToRootViewController 返回到第一个 View Controller 。

[self.navigationController popToRootViewControllerAnimated:YES];