奇怪的 EXC_BAD_ACCESS 与 [selfmissModalViewControllerAnimated]
在我的应用程序中，我以模式方式在视图之间切换。我的问题是，当我从第一个 viewController 移动到第二个 viewController 时，它可以工作。当我第一次忽略第二个视图时，这也有效。你说问题出在哪里？它来了。当我第二次从第一个视图控制器移动到第二个视图控制器时，它再次工作。正如它应该的那样。然而，当我第二次尝试关闭第二个 viewController 时，我收到了 EXC_BAD_ACCESS 错误
[self dismissModalViewControllerAnimated:YES];
。
为什么第二次会崩溃，而第一次却不会？
编辑一：
无论我切换到哪个视图控制器，都会发生此错误：
如果我从 A 移动到 B，然后返回 A，然后返回 B，然后尝试返回 A：崩溃 如果我从 A 移动到 C，然后回到 A，然后到 C，然后尝试返回到 A：再次崩溃
编辑二：
我使用以下代码创建/显示视图控制器：
MapView *controller = [[MapView alloc] initWithNibName:@"MapView" bundle:nil];
controller.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:controller animated:YES];
我应该在创建后释放该对象吗？
问题解决了。在使用模态视图之前，我在使用模态视图之前使用了有问题的代码行，但我忘记将其删除。赢。
In my app, I switch between views modally. My problem is, when I move from the first viewController to the second, it works. When I dismiss the second view for the first time, that also works. Where is the problem, you say? It's coming. When I move from the first viewController to the second a second time, it works again. Just as it should. Yet when I try to dismiss the second viewController the SECOND time, I get an EXC_BAD_ACCESS error on the
[self dismissModalViewControllerAnimated:YES];
line.
Why does it crash the second time, but never the first time?
EDIT ONE:
This error happens no matter which viewController I switch to:
If I move from A to B, then back to A, then to B, then try to go back to A: crash
If I move from A to C, then back to A, then to C, then try to go back to A: crash again
EDIT TWO:
I create/show the view controller with this code:
MapView *controller = [[MapView alloc] initWithNibName:@"MapView" bundle:nil];
controller.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:controller animated:YES];
Should I be releasing this object after its creation?
Problem solved. Offending line of code was being used earlier for the transition I was using before I used modal views, and I forgot to remove it. Win.
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通常，
EXC_BAD_ACCESS错误意味着您正在尝试引用已释放的对象，即您过度释放了某些内容。检查一下您的内存管理，也许运行构建/构建和分析工具。是的，您应该在以模态方式呈现视图控制器后调用
[controller release];。Typically, an
EXC_BAD_ACCESSerror means you are trying to reference a deallocated object, i.e. you are over-releasing something. Check back through your memory management, maybe run the Build/Build and Analyze tool.And yes, you should call
[controller release];after presenting the viewcontroller modally.