问题
I have a step in my application where a user repeatedly hears three spoken digits.
If I leave this step running for a while (for certain undefined values of "while"), my debug logs show this (irrelevant log entries removed):
2010-03-01 13:44:21.283 iPhoneHearChk[1236:207] AudioFileOpenURL returned 0
(for <file://localhost/var/mobile/Applications/3A28F975-EAD5-4A5B-AFE6-FA1C6EE95732/iPhoneHearChk.app/5b3.ima4>)
2010-03-01 13:44:35.493 iPhoneHearChk[1236:207] AudioFileOpenURL returned 0
(for <file://localhost/var/mobile/Applications/3A28F975-EAD5-4A5B-AFE6-FA1C6EE95732/iPhoneHearChk.app/5b3.ima4>)
2010-03-01 13:45:17.916 iPhoneHearChk[1236:207] AudioFileOpenURL returned 0
(for <file://localhost/var/mobile/Applications/3A28F975-EAD5-4A5B-AFE6-FA1C6EE95732/iPhoneHearChk.app/5b3.ima4>)
2010-03-01 13:47:00.408 iPhoneHearChk[1236:207] AudioFileOpenURL returned -43
(for <file://localhost/var/mobile/Applications/3A28F975-EAD5-4A5B-AFE6-FA1C6EE95732/iPhoneHearChk.app/5b3.ima4>)
From what I've read, MacErrors.h defines -43 as fnErr, File Not Found. But clearly the file does exist, because I've successfully opened it before. What gives?
How I open the file:
NSString *soundFilePath = [[NSBundle mainBundle] pathForResource: name ofType: type];
if (!soundFilePath) { NSLog(@"No path found for sound file %@.%@", name, type); }
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: soundFilePath];
rc = AudioFileOpenURL((CFURLRef) fileURL, kAudioFileReadPermission, 0, &file);
where file is an AudioFileID instvar and name and type are NSString * parameters.
回答1:
Is it possible that you are running out of file handles? Do you close the files you open after you are finished with them?
来源：https://stackoverflow.com/questions/2355911/audiofileopenurl-returns-43-on-an-existing-file