具有核心图形功能的 iPad 设备上出现奇怪的崩溃
我在 iPad 上遇到很多奇怪的 EXC_BAD_ACCESS 崩溃，这些崩溃只发生在设备上而不是模拟器中。我假设它们在某种程度上与记忆有关，但我不确定。它们都与图像上下文相关的函数一起发生。
一个奇怪的例子是使用 CGImageCreateWithImageInRect。例如，如果我运行一堆 UIImage 并使用 CGImageCreateWithImageInRect 裁剪它们，它总是会在特定的任意尺寸下崩溃。就像，如果我将它们全部裁剪为 200x200，它会在处理 12 个图像后崩溃。如果我将它们裁剪为 210x210，那就没问题了。
EXC_BAD_ACCESS 发生在从“CGBlt_copyBytes”调用的“memmove”内部。这就是调试器向我展示的所有奇怪的东西。我看不到我的任何方法的调用堆栈。
所有这些在模拟器中都运行良好！
我知道这一切都非常模糊，但如果有人有任何想法，他们将不胜感激。
I am getting a lot of strange EXC_BAD_ACCESS crashes on the iPad that only happen on the device and not in the simulator. I am assuming that they are somehow memory related, but I am not sure. They all happen with image context related functions.
One strange example is using CGImageCreateWithImageInRect. For example, if i run through a bunch of UIImages and crop them with CGImageCreateWithImageInRect, it will always crash at specific arbitrary sizes. Like, if I crop them all to 200x200, it crashes out after processing 12 images. If i crop them to 210x210, it works no problem.
The EXC_BAD_ACCESS happens inside of "memmove" called from "CGBlt_copyBytes". That is all the debugger shows me strangely enough. I can't see the callstack going up to any of my methods.
All of this works fine in the simulator!
I know this is all very vague, but if anyone has any ideas, they would be greatly appreciated.
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首先执行检查僵尸、运行 clang（构建和分析）等操作来查看是否存在内存管理问题。我认为您需要发布更多代码，因为这听起来确实像是内存踩踏。
Start by doing things like checking for zombies, and running clang (Build & Analyze) to see if you have memory management issues. I think you'll need to post more code, because this does sound like memory stomping.