ios - 切换 View Controller 时我在 Xcode 中出错

Question

我希望只有在输入的密码正确时才能进入 View Controller 。我使用了以下代码 -

 if(([input isEqual:@"12"]))
{
    NSLog(@"change view controller");
    NSString * storyboardName = @"Main";
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
    UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:@"secondViewController"];
    [self presentViewController:vc animated:YES completion:nil];

}

但是当我输入时，Xcode 给了我一个 sigbrt 错误，所以我添加了一个全异常断点，但它转到 main.m 并显示“线程 1:断点 1.1”。

感谢您的阅读，如果您知道答案请回答

Answer 1

SecondViewController *second=[self.storyboard instantiateViewControllerWithIdentifier:@"storyboardid"];
[self.navigationController presentViewController:second animated:YES completion:nil];