ios - 重叠的声音

Question

为什么我的音乐重叠？有什么办法可以一一播放吗？

- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableArray *array = [NSMutableArray array];
[array insertObject: [[NSBundle mainBundle] pathForResource:@"Master of Puppets" ofType:@"mp3"] atIndex:0];
[array insertObject: [[NSBundle mainBundle] pathForResource:@"music" ofType:@"mp3"] atIndex:1];
[array insertObject: [[NSBundle mainBundle] pathForResource:@"Start" ofType:@"caf"] atIndex:2];
[array insertObject: [[NSBundle mainBundle] pathForResource:@"thx" ofType:@"m4v"] atIndex:3];
[array insertObject: [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"aif"] atIndex:4];

for (int i=0; i < [array count]; i++)
{
theAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:[array objectAtIndex:i]] error:NULL]; 
theAudio.delegate = self;
[theAudio prepareToPlay];
[theAudio play];       
}

在 .h 中:

@interface STAMP_AudioViewController : UIViewController <AVAudioPlayerDelegate>{
AVAudioPlayer* theAudio;
}

@end

Answer 1

实现来自 AVAudioPlayerDelegate 的 audioPlayerDidFinishPlaying 委托(delegate)然后从那里开始第二首歌......

NSMutableArray *array ;
int index = 0;

- (void)viewDidLoad
{
  [super viewDidLoad];
  NSMutableArray *array = [NSMutableArray array];
  [array insertObject: [[NSBundle mainBundle] pathForResource:@"Master of Puppets" ofType:@"mp3"] atIndex:0];
  [array insertObject: [[NSBundle mainBundle] pathForResource:@"music" ofType:@"mp3"] atIndex:1];
  [array insertObject: [[NSBundle mainBundle] pathForResource:@"Start" ofType:@"caf"] atIndex:2];
  [array insertObject: [[NSBundle mainBundle] pathForResource:@"thx" ofType:@"m4v"] atIndex:3];
  [array insertObject: [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"aif"] atIndex:4];

  theAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:[array  objectAtIndex:index]] error:NULL]; 
  theAudio.delegate = self;
  [theAudio prepareToPlay];
  [theAudio play]; 

  index++;      
}

现在播放器播放第一首歌曲..下面给定的代表将在歌曲完成后触发..然后播放第二首歌曲..记住你必须释放第一个播放器并初始化新的 AVAudioPlayer 并用第二首歌曲初始化..

- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{
  [theAudio release];

  if(index > 4)//your array highest index
    return;

  theAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:[array  objectAtIndex:index]] error:NULL]; 
  theAudio.delegate = self;
  [theAudio prepareToPlay];
  [theAudio play];

  index++;
}

这个逻辑应该可行..我在 AVAudioPlayer 中找不到任何函数来在初始化后更改歌曲..所以我们需要创建新对象..:(