如何在桌面单元格点击时在背景中播放音频

Question

我有tableview，我在tableview中显示资源文件夹的.wav文件。歌曲在桌面视图中正确显示。当我在该特定歌曲的tableview单元格中选择一首特定歌曲时，会显示一个复选标记，同时该歌曲应该在背景上播放。我已经完成了此代码以播放特定所选歌曲背景，但它不能正常工作。可能是什么问题。谢谢。

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    app = (StopSnoozeAppDelegate*)[[UIApplication sharedApplication]delegate]; 

    app.newcheckarray = [[[NSBundle mainBundle]pathsForResourcesOfType:@".wav" inDirectory:nil]retain]; 
    tblView.delegate = self; 
    tblView.dataSource = self; 


} 



- (UITableViewCell *)tableView:(UITableView *)tableView 
     cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    static NSString *CellIdentifier = @"Cell"; 

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) { 
     cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 
             reuseIdentifier:CellIdentifier] autorelease]; 
    } 



    switch (indexPath.row) { 
     case 0: 
      soundstring = [app.newcheckarray objectAtIndex:0]; 
      cell.textLabel.text = [soundstring lastPathComponent]; 

      break; 
     case 1: 
      soundstring =[app.newcheckarray objectAtIndex:1]; 
      cell.textLabel.text = [soundstring lastPathComponent]; 
      break; 


     default: 
      break; 
    } 
    cell.accessoryType = ([indexPath isEqual:rowselection]) ? UITableViewCellAccessoryCheckmark : UITableViewCellAccessoryNone; 

    return cell; 
} 



- (void)tableView:(UITableView *)tableView 
didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    self.rowselection = indexPath; 

    [tableView deselectRowAtIndexPath:indexPath animated:YES]; 
    [tableView reloadData]; 

    for (int i= 0;i <[[self.navigationController viewControllers] count];++i) 
    { 
     UIViewController *aController = [[self.navigationController viewControllers]objectAtIndex:i]; 
     if ([aController isKindOfClass:[TAddAlarmController class]]) 
     { 
      NSString *newsong1 = [app.newcheckarray objectAtIndex:indexPath.row]; 
      app.newsong = [newsong1 lastPathComponent]; 
      NSURL *pewPewURL1 = [NSURL fileURLWithPath:app.newsong]; 
      AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:pewPewURL1 error:nil]; 

      [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil]; 
      [[AVAudioSession sharedInstance] setActive: YES error: nil]; 
      [[UIApplication sharedApplication] beginReceivingRemoteControlEvents]; 

      [audioPlayer play];   
      [delegate selectsoundControllerReturnedsound:app.newsong forIndexPath:self.indexPathToChange]; 

     } 


    } 


} 

在didselect我正在初始化我的audioplayer，但它不播放音频。

Answer 1

我已经使用下面的代码UIAlertView。你可以尝试在

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 

方法

你需要添加AudioToolbox.framework和

#import <AudioToolbox/AudioServices.h> 

代码：

NSString *soundPath = [[NSBundle mainBundle] pathForResource:@"Voicemail" ofType:@"wav"];  
    SystemSoundID soundID;  
    AudioServicesCreateSystemSoundID((CFURLRef)[NSURL fileURLWithPath: soundPath], &soundID);  
    AudioServicesPlaySystemSound (soundID);