Question

我想切换到另一个viewController。我的视图中有一个UIButton，UIButton使用此代码有一个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viewControllers的动作是：

- (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我一个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];

并遇到了同样的问题。据我所知，SIGABRT意味着存在内存问题，自启用自动参考计数器以来我无法理解。

有关如何解决此问题的任何想法？

提前致谢：）

Answer 1

如果ButtonSettingsViewController是视图控制器的类型，则需要先对其进行初始化：

- (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];
}

Answer 2

presentModalViewController：animated：需要一个视图控制器对象。你传递了一个类（ButtonSettingsViewController）。首先实例化视图控制器对象：

ButtonSettingsViewController *viewControllerObject = [[ButtonSettingsViewController alloc] initWithNibName:@"ButtonSettingsViewController" bundle:nil];

然后设置该视图控制器对象的modalTransitionStyle属性：

viewControllerObject.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;

然后呈现它：

[self presentModalViewController:viewControllerObject animated:YES];

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

2 个答案: