Xcode:为什么我使用presentModalViewcontroller 收到SIGABRT 消息？

Question

我想切换到另一个viewController。我的 View 上有一个 UIButton，UIButton 使用以下代码有一个 UILongPressGestureRecognizer:

UILongPressGestureRecognizer *buttonLongPressRecognizer;
buttonLongPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(LoadButtonSettings:)];

buttonLongPressRecognizer.numberOfTouchesRequired = 1;
buttonLongPressRecognizer.minimumPressDuration = 2.0;

[NewButton addGestureRecognizer:buttonLongPressRecognizer];

我用来切换 viewController 的操作是这样的:

- (IBAction)LoadButtonSettings:(id)sender {

[ButtonSettingsViewController setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];

[self presentViewController:ButtonSettingsViewController animated:YES completion:NULL];

}

问题是，当我长按按钮时，我的应用程序崩溃并给出 SIGABRT 错误。奇怪的是，它只发生在我的 iPhone 上，而不是模拟器上。

我也尝试过使用

    [self presentModalViewController:ButtonSettingsViewController animated:YES];

也遇到了同样的问题。据我所知，SIGABRT 意味着存在内存问题，但我不明白，因为自动参​​考计数器已打开。

关于如何解决这个问题有什么想法吗？

提前致谢:)

Answer 1

如果 ButtonSettingsViewController 是 View Controller 的类型，您需要先初始化它:

- (IBAction)LoadButtonSettings:(id)sender {
    // init & alloc - Replace with your custom view controllers initialization method (if applicabale)
    ButtonSettingsViewController *viewController = [[ButtonSettingsViewController alloc] initWithNibNamed:@"ButtonSettingsViewController" bundle:nil];

    [viewController setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];
    [self presentViewController:viewController animated:YES completion:NULL];
}