Passing address of non-local object to __autoreleasing parameter for write-back

Question

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

Passing address of non-local object to __autoreleasing parameter for write-back

RootViewController.h

RootViewController.m

Answer 1

It would have been easier to diagnose the error without having to guess at the line number on which it occurs, but I think the issue is your use of the error instance variable to pass as the error here:

30    [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error: &error];

also here

49    [fm removeItemAtPath:[recordedTmpFile path] error:&error];

The reason is that, if an error occcurs, in setCategory:error: the existing value of error will be overwritten without being released and is thus a potential leak.