WARNING: 998: Failure to setup sound, err = -50

文章来自：http://blog.sina.com.cn/u/5066584704

 播放音频项目的时候，出现问题
解决方法：
1、音频文件位置放入工程目录中，在 project->Build Phases->Copy Bundle Resources
中确认音频文件是否加入，如果没有，点击+,添加
2、确认代码执行中是否调用了使用AudioServicesCreateSystemSoundID所在的函数
我的代码如下：

-(id)init{

    self=[super initWithNibName:@"ViewController" bundle:nil];

    if(self){

        NSString *soundPath = [[NSBundle mainBundle]pathForResource:@"Sound12" ofType:@"aif"];

    if(soundPath){

        NSURL *soundURL =[NSURL fileURLWithPath:soundPath];

        OSStatus err = AudioServicesCreateSystemSoundID((__bridge CFURLRef)soundURL, &shortSound);

        if(err!= kAudioServicesNoError){

            NSLog(@"Could not load %@,error code:%d",soundURL,err);

            

        }

    }

    }

    return  self;

}

- (void)viewDidLoad {

    [super viewDidLoad];

    [self init]; //出现的问题是没有在此处添加[self init]

    [self.view setBackgroundColor:[UIColor whiteColor]];

    [self initContent];

    // Do any additional setup after loading the view, typically from a nib.

}

-(void)initContent{

    btn1.layer.borderColor=[UIColor grayColor].CGColor;

    btn2.layer.borderColor=[UIColor grayColor].CGColor;

    btn1.layer.borderWidth=0.3f;

    btn2.layer.borderWidth=0.3f;

    

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

- (IBAction)playmusic:(id)sender {

    //播放声音

    AudioServicesPlaySystemSound((SystemSoundID)shortSound);

    AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);

}

经过这样修改之后，可以正常播放音频了。

如果还是会出现警告，是因为调用了 AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);屏蔽掉它或者忽略警告即可。