带有 renderInContext 的 iPad 3 设备崩溃 [英] iPad 3 Device Crash with renderInContext

问题描述

我一直在我的应用程序中使用以下代码将自定义 UIView 呈现为图像.该代码在模拟器(iPad 和 iPad Retina)以及 iPad 1 和 iPad 2 设备上运行良好.但是，我最近在 iPad 3 设备上对其进行了测试，并且遇到了我似乎无法解决的崩溃问题.相关的代码片段是:

I have been using the following code in my application to render out a custom UIView to an image. The code works great in the Simulator (iPad and iPad retina) as well as on iPad 1 and iPad 2 devices. However, I recently tested it on the iPad 3 device, and am getting a crash that I can't seem to resolve. The relevant code snippet is:

UIGraphicsBeginImageContext(CGSizeMake(myUIView.frame.size.width, myUIView.frame.size.height));
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSaveGState(context);
[myUIView.layer renderInContext:context];

应用程序在最后一行崩溃.以下是崩溃日志:

The application crashes on the last line. The following is in the crash log:

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x12311000
Crashed Thread:  5

从后面的日志中:

Thread 5 name:  Dispatch queue: com.apple.root.default-overcommit-priority
Thread 5 Crashed:
0   ImageIO                         0x3384bcb4 ImageIO_ABGR_TO_ARGB_8Bit + 68
1   ImageIO                         0x3388761c __copyImageBlockSetPNG_block_invoke_1 +  608
2   libdispatch.dylib               0x348c0c52 _dispatch_call_block_and_release + 6
3   libdispatch.dylib               0x348c3810 _dispatch_worker_thread2 + 252
4   libsystem_c.dylib               0x33145df4 _pthread_wqthread + 288
5   libsystem_c.dylib               0x33145cc8 start_wqthread + 0

我一开始以为这是内存管理错误，但它只出现在 iPad 3 设备上，而且我使用的是 ARC.这让我很难过.

I first thought that this was a memory management error, but it's only on the iPad 3 device and I'm using ARC. This has me stumped.

有什么建议可以进一步解决这个问题吗?有没有其他人遇到过这种行为?

Any suggestions of where I might look to troubleshoot this further? Has anyone else encountered this sort of behavior?

提前致谢！

推荐答案

试试

UIGraphicsBeginImageContextWithOptions(CGSizeMake(myUIView.frame.size.width, myUIView.frame.size.height), NO, [[UIScreen mainScreen] scale]);

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