instantiateViewControllerWithIdentifier 导致崩溃
我正在尝试使用故事板让 UISplitViewController 工作,但是当我尝试实例化我的主 ViewController 时,我的应用程序因神秘的 EXC_BAD_ACCESS 和反汇编而崩溃。
我的 UISplitViewController 子类上有一个属性 splitNavVc
,在我的故事板中我有以下设置。 splitNavVc
位于左侧,是 UINavigationController 的子类。问题是,在视图加载时尝试实例化 splitNavVc 后,应用程序崩溃了。为了实例化它,我使用
if(!detailVc){
detailVc = [self.storyboard instantiateViewControllerWithIdentifier:@"DetailVc"];
}
if(!splitNavVc){
splitNavVc = [self.storyboard instantiateViewControllerWithIdentifier:@"SplitMenu"];// crash
}
[self setViewControllers:[NSArray arrayWithObjects:splitNavVc, detailVc, nil]];
有什么方法可以追踪异常的原因吗? EXC_BAD_ACCESS
并不是特别具有描述性。
没有堆栈跟踪转储到控制台 (lldb),但这是错误:
I'm trying to get a UISplitViewController to work using a storyboard, but when I try to instantiate my master ViewController my app crashes with a cryptic EXC_BAD_ACCESS and a disassembly.
I have a property, splitNavVc
on my subclass of UISplitViewController, in my storyboard I have the setup below. splitNavVc
is on the left hand side and is a subclass of UINavigationController. The problem is, after trying to instantiate the splitNavVc when the view loads, the app crashes. To instantiate it, I'm using
if(!detailVc){
detailVc = [self.storyboard instantiateViewControllerWithIdentifier:@"DetailVc"];
}
if(!splitNavVc){
splitNavVc = [self.storyboard instantiateViewControllerWithIdentifier:@"SplitMenu"];// crash
}
[self setViewControllers:[NSArray arrayWithObjects:splitNavVc, detailVc, nil]];
Is there any way I can track down the cause of the exception? EXC_BAD_ACCESS
isn't particularly descriptive.
There's no stack trace dumped to the console (lldb), but this is the error:
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奇怪的是,当我将 XCode 中的调试器从 LLDB 切换到 GDB 时,这种情况似乎不再发生。如果这有什么区别的话,我使用 LLVM 作为编译器。
Bizarrely, this seemed to stop happening when I switched the debugger in XCode from LLDB to GDB. I'm using LLVM as the compiler if that makes a difference.