objective-c - NSSound 奇怪的错误

Question

此代码播放声音：

NSSound *sound = [[NSSound alloc] initWithContentsOfFile:@"/Users/alex/test.ogg"
                                            byReference:NO];
[sound play];

此代码不会：

NSData *song = [testingResultsData objectAtIndex:0];
[song writeToFile:@"/Users/alex/test.ogg" atomically:YES];
NSSound *sound = [[NSSound alloc] initWithData:song];
[sound play];

两种情况下内容相同；唯一的区别是它是取自磁盘上的文件还是直接取自NSData.