Couldn't play system sound after switching to iOS 5

Question

This is how I played a beep sound effect in iOS 4:

SystemSoundId beepOnSoundId;

CFURLRef soundUrl = CFBundleCopyResourceURL(
    CFBundleGet         


        

Answer 1

In my Constructor:

[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];
UInt32 doSetProperty = 1;
AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(doSetProperty), &doSetProperty);
[[AVAudioSession sharedInstance] setActive: YES error: nil];
NSURL* musicFile  = [NSURL fileURLWithPath:[[NSBundle mainBundle]
                                                   pathForResource:@"video-sent"
                                                   ofType:@"caf"]];
self.sentSound = [[AVAudioPlayer alloc] initWithContentsOfURL:musicFile error:nil];
[self.sentSound prepareToPlay];

The function playSentSound

- (void)playSentSound
{
    DLog(@"PLay Sound %@", self.sentSound);
    [self.sentSound play];
}

then later in the code i just call it

[self playSentSound];

The key here are the first 4 lines ... ;-)