Question

我正在尝试以编程方式创建AVAudioPlayer。如果我播放audioplayer，我会遇到小问题。我在UITableview中显示12个音频项目。如果我点击相应歌曲将播放的第一个项目。我不应该点击任何传递按钮。我点击后退按钮并点击第二个项目。如果我点击第二个项目，音频视图控制器将显示.I点击播放按钮歌曲显示。在第一首歌和第二首歌同时播放。这是我的问题。请帮助我任何人。

-(void)playOrPauseButtonPressed:(id)sender
{
if(playing==NO)

{

[playButton setBackgroundImage:[UIImage imageNamed:@"Pause.png"] forState:UIControlStateNormal];

// Here Pause.png is a image showing Pause Button.

NSError *err=nil; 
AVAudioSession *audioSession=[AVAudioSession sharedInstance];

[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];

NSLog(@"%@ %d",urlsArray,selectedIndex);

NSString *sourcePath=[urlsArray objectAtIndex:selectedIndex];

NSData *objectData=[NSData dataWithContentsOfURL:[NSURL URLWithString:sourcePath]];

audioPlayer = [[AVAudioPlayer alloc] initWithData:objectData error:&err];

audioPlayer.numberOfLoops = 0;

[audioPlayer prepareToPlay];
audioPlayer.delegate=self;
[audioPlayer play];
playing=YES;
}
else if (playing==YES)

{
[playButton setBackgroundImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateNormal];

[audioPlayer pause];

playing=NO;

}
if (self.audioPlayer)

{
[self updateViewForPlayerInfo];

[self updateViewForPlayerState];

[self.audioPlayer setDelegate:self];

}
}

-(void)updateViewForPlayerInfo

{

self.songDuration.text = [NSString stringWithFormat:@"%d:%02d", (int)self.audioPlayer.duration / 60, (int)self.audioPlayer.duration % 60, nil];

NSLog(@"%f", self.audioPlayer.duration);

self.progressBar.maximumValue = self.audioPlayer.duration;

self.volumeSlider.value = self.audioPlayer.volume;

}

-(void)updateViewForPlayerState

{

[self updateCurrentTime];

if (self.updatedTimer)

{

[self.updatedTimer invalidate];

}

if (self.audioPlayer.playing)

{

self.updatedTimer = [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:@selector(updateCurrentTime) userInfo:self.audioPlayer repeats:YES];

}

}

-(void)updateCurrentTime

{

//NSLog(@"self.audioPlayer.currentTime = %f", self.audioPlayer.currentTime);

self.currentTime.text = [NSString stringWithFormat:@"%d:%02d", (int)self.audioPlayer.currentTime / 60, (int)self.audioPlayer.currentTime % 60, nil];

self.progressBar.value = self.audioPlayer.currentTime;

}

-(void)volumeSliderMoved:(UISlider *)sender

{

self.audioPlayer.volume=[sender value];

}

Answer 1

回去时停止播放器。也许在ViewWillDisappear中或在创建audioplayer的新实例之前，您可以调用

if(self.audioplayer) {
  [self.audioPlayer stop];
  self.audioPlayer = nil;
}

Answer 2

在创建AVAudioPlayer的新实例之前，使用以下行释放或取消现有的播放器实例

sourcePath=Nil;
[audioPlayer stop];
audioPlayer = Nil;

Answer 3

在初始化AVAudioPlayer之前，删除之前运行的所有实例。

//YOUR STUFF


NSString *sourcePath=[urlsArray objectAtIndex:selectedIndex];

NSData *objectData=[NSData dataWithContentsOfURL:[NSURL URLWithString:sourcePath]];

for (AVAudioPlayer *a in urlsArray) 
    [a stop];

audioPlayer = [[AVAudioPlayer alloc] initWithData:objectData error:&err];

audioPlayer.numberOfLoops = 0;

//REST STUFF

如何使用AVAudioplayer在ios中播放audioplayer

3 个答案: