与instantiateViewControllerWithIdentifier崩溃 [英] Crash with instantiateViewControllerWithIdentifier

问题描述

我试图让一个UISplitViewController工作使用一个故事板，但是当我尝试实例化我的主ViewController我的应用程序崩溃与隐藏EXC_BAD_ACCESS和反汇编。

我在UISplitViewController的子类中有一个属性 splitNavVc ，在我的故事板中我有下面的设置。 splitNavVc 位于左侧，是UINavigationController的子类。问题是，在加载视图后尝试实例化splitNavVc后，应用程序崩溃。要实例化，我正在使用

  if（！detailVc）{
 detailVc = [self.storyboard instantiateViewControllerWithIdentifier： @DetailVc]; 
} 
 if（！splitNavVc）{
 splitNavVc = [self.storyboard instantiateViewControllerWithIdentifier：@SplitMenu]; // crash 
} 
 [self setViewController： NSArray arrayWithObjects：splitNavVc，detailVc，nil]]; 
  

有没有办法跟踪异常的原因？ EXC_BAD_ACCESS 没有特别描述。

没有堆栈跟踪转储到控制台（lldb），但这是错误：

解决方案

奇怪的是，当我将XCode中的调试器从LLDB到GDB。我使用LLVM作为编译器，如果这有所作为。

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:

解决方案

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.

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