warning: 'AVAudioSession' may not respond to '-setActive:fooError:' [closed]

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[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord fooError: &fooError];开发者_运维百科
//Activate the session
[audioSession setActive:YES fooError: &fooError];

The warning i receive is

warning: 'AVAudioSession' may not respond to '-setActive:fooError:'

---

It looks like you your class, or a class that you're using has an instance variable called error in its header file. Try this:

 NSError *fooError = nil;
    oneAudioC = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:&fooError];
    if (fooError)
        NSLog(@"%@",[fooError localizedDescription]);

Edit: Changed if (error) to if (fooError)

---

The warning already tells you what the problem is: The AVAudioSession methods are called -setCategory:error: and -setActive:error:, not -setCategory:fooError: and -setActive:fooError:, respectively. You can change parameter names any way you want but not method names:

[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error: &fooError];
//Activate the session
[audioSession setActive:YES error: &fooError];