音频文件未在 iPhone/iOS 中播放

Question

我需要在表格视图中播放我从json 获取的音频文件（mp3），单击行时，相应的歌曲路径正在传递到另一个 UIView..在加载视图时它应该播放。

我知道有很多类似的问题粘贴在互联网上，我尝试了很多对我没有用的方法。

这里是代码sn-p。

- (void)viewDidLoad
{
     [super viewDidLoad];

     NSError *error = nil;
     [[AVAudioSession sharedInstance]setCategory:AVAudioSessionCategoryAmbient error:&error];
//  audioFile--contains path-- 
//    NSString *filePath = [[NSBundle mainBundle] pathForResource:audioFile ofType:@"mp3"];
     NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSAllLibrariesDirectory, NSUserDomainMask, YES) objectAtIndex:0];

     NSString *filePath = [documentsDirectory stringByAppendingPathComponent:audioFile];

     NSURL *url = [NSURL fileURLWithPath:filePath];

     player = [[AVAudioPlayer alloc]initWithContentsOfURL:url error:&error];
     if([self.player prepareToPlay])
     {
          NSLog(@"preparing");
     }
     else
     {           
          NSLog(@"some error");
     }
     if([self.player play])
     {
          NSLog(@"playing");
     }
     NSLog(@"not playing");
     NSLog(@"\n\nfile path-> %@\n\n url-> %@",filePath,url);
}

其中 player 是 AVAudioPlayer 类的对象

   @property (strong, nonatomic) AVAudioPlayer *player;

从上面来看，来自 NSLog() 的值是（对于特定行）

 file path-> /Users/ensignweb/Library/Application Support/iPhone Simulator/6.1/Applications/CE146654-3D1B-4F60-B37D-825267FD6EFB/Library/http:/www.fundamentalalvarado.com/assets/sermons/bible-doctrine-series/033113-pm-Doctrine of Creation vs The Lie of Evolution.mp3

 url-> file://localhost/Users/ensignweb/Library/Application%20Support/iPhone%20Simulator/6.1/Applications/CE146654-3D1B-4F60-B37D-825267FD6EFB/Library/http:/www.fundamentalalvarado.com/assets/sermons/bible-doctrine-series/033113-pm-Doctrine%20of%20Creation%20vs%20The%20Lie%20of%20Evolution.mp3

当我使用 NSBundle 时，文件路径为空，所以我评论了它。即使在最后 If Loop 转义到 else。我想可能是问题所在。

请帮帮我。

Answer 1

这段代码对我有用

@interface PlayAudioVc : UIViewController<AVAudioPlayerDelegate>
{
//for playback section
    AVAudioPlayer *audioPlayer;
}

-(IBAction) playAudio{
        NSError *error;
        NSURL *url = [NSURL fileURLWithPath:self.audioName];
        audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
        audioPlayer.delegate = self;
        if (error)
            NSLog(@"Error: %@", [error localizedDescription]);
        else
            [audioPlayer play];
}

self.audioName 包含指向音频文件的有效路径

Answer 2

我在我的应用程序中这样做，它就像一个魅力

/**
 *  This method plays the 'pop' sound during the animation.
 */
-(void) playSound : (NSString *) fName : (NSString *) ext
{
    NSString *path  = [[NSBundle mainBundle] pathForResource : fName ofType :ext];
    if ([[NSFileManager defaultManager] fileExistsAtPath : path])
    {
        NSURL *pathURL = [NSURL fileURLWithPath : path];
        AudioServicesCreateSystemSoundID((__bridge CFURLRef) pathURL, &audioEffect);
        AudioServicesPlaySystemSound(audioEffect);
    }
    else
    {
        NSLog(@"error, file not found: %@", path);
    }
}

您需要导入#import AVFoundation/AVFoundation.h 和相应的框架。

转到复制捆绑资源下的项目摘要和构建阶段选项卡。

在复制包资源下检查音频文件是否存在。

Answer 3

试试这个，

包含 AVFoundtion.Framework 并将 AVFoundation/AVFoundation.h 导入 ViewController 并在 '.h' 文件中添加 AVAudioPlayerDelegate。 p>

然后为 AVAudioPlayer 类创建对象

@property (nonatomic, retain) AVAudioPlayer *audioPlayer;

NSString *path = [[NSBundle mainBundle]pathForResource:@"AIRTEL" ofType:@".MP3"];
NSURL *url = [NSURL fileURLWithPath:path];

NSError *error;
audioPlayer = [[AVAudioPlayer alloc]
               initWithContentsOfURL:url
               error:&error];
if (error)
{
    NSLog(@"Error in audioPlayer: %@",
          [error localizedDescription]);
} else {
    audioPlayer.delegate = self; 
    [audioPlayer prepareToPlay];
    [audioPlayer play];

}

希望这会有所帮助。

Answer 4

您的网址看起来很奇怪：

url-> file://localhost/Users/ensignweb/Library/Application%20Support/iPhone%20Simulator/6.1/Applications/CE146654-3D1B-4F60-B37D-825267FD6EFB/Library/http:/www.fundam

它以 file:// 开头并包含 http://