如何从项目中获取音频文件

Question

我在iphone中没有声音，这是我的代码

NSString *filepath=[[NSBundle mainBundle]pathForResource:@"horror (2)" ofType:@"mp3" ];
NSLog(@"filepath=%@",filepath);
url=[[NSURL alloc]initFileURLWithPath:filepath ];
NSLog(@"url==%@",url);
audioplayer=[[AVAudioPlayer alloc]initWithContentsOfURL:url error:nil ];
[self.audioplayer prepareToPlay];
self.audioplayer.currentTime=0;
[self.audioplayer play];
audioplayer.numberOfLoops=-1;

Answer 1

检查文件是否存在以及AVAudioPlayer提供的错误：

 NSString *filepath=[[NSBundle mainBundle]pathForResource:@"horror (2)" ofType:@"mp3" ];
if([[NSFileManager defaultManager] fileExistsAtPath:filepath])
{
  url=[[NSURL alloc]initFileURLWithPath:filepath];
  NSLog(@"url==%@",url);
  if(url)
  {
    NSError *error;
    audioplayer=[[AVAudioPlayer alloc]initWithContentsOfURL:url error:&error];
    self.audioplayer.numberOfLoops=-1;
    [self.audioplayer prepareToPlay];

    if (self.audioPlayer == nil)
        NSLog([error description]);             
    else 
        [self.audioplayer play];
  }
  else
  {
    NSLog(@"URL not created");
  }
}
else
{
  NSLog(@"File not exists");
}

Answer 2

检查实例化audioplayer变量导致的错误：

...
NSError *err;
audioplayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&err];
NSLog(@"ERROR: %@", [err localizedDescription]);
...

这可能会为您提供问题根源的线索。