iPad 3使用renderInContext的设备崩溃 [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来渲染自定义UIView到图像。代码在模拟器（iPad和iPad视网膜）以及iPad 1和iPad 2设备上都很出色。但是，我最近在iPad 3设备上测试它，我得到一个崩溃，我似乎不能解决。相关的代码片段：

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。以下是在崩溃日志：

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

和从后在日志中：

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

我首先认为这是一个内存管理错误，但它只有在iPad 3设备，我使用ARC。

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，我可能会在哪里进一步解决这个问题？有没有人遇到过这种行为？

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

提前感谢！

推荐答案

试用

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

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