xcode 将非本地对象的地址传递给 __autoreleasing 参数以进行回写
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Passing address of non-local object to __autoreleasing parameter for write-back
提问by Javier
I'm trying to make app with xcode 4.2 and i'm really confused whay happen this. Could someone help me an explain me why have error in lines when appear &error
我正在尝试使用 xcode 4.2 制作应用程序，我真的很困惑为什么会发生这种情况。有人能帮我解释一下为什么出现 &error 时出现错误
Passing address of non-local object to __autoreleasing parameter for write-back
将非本地对象的地址传递给 __autoreleasing 参数以进行回写
回答by JeremyP
It would have been easier to diagnose the error without having to guess at the line number on which it occurs, but I thinkthe issue is your use of the error instance variable to pass as the error here:
诊断错误会更容易，而不必猜测它发生的行号，但我认为问题在于您使用错误实例变量在此处作为错误传递：
30 [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error: &error];
also here
也在这里
49 [fm removeItemAtPath:[recordedTmpFile path] error:&error];
The reason is that, if an error occcurs, in setCategory:error:the existing value of errorwill be overwritten without being released and is thus a potential leak.
原因是，如果发生错误，setCategory:error:现有的值error将被覆盖而不被释放，因此是潜在的泄漏。
