从 URL 下载音频文件并在 iOS App 中播放

Question

我有一个 URL 是我从 JSON 响应中得到的，当我在浏览器中点击 URL 时，文件已下载，现在我想知道如何播放这样的 URL 这是一个下载 URL.I 已经四处寻找了很多 post 但其中 none 可以帮助我。

url 的类型正在获取：http://www.smartivr.in/sounds/voicemail/download/f77245d9-e7ee-4424-850c-6a45022d0a54_1

下面是我试过的代码。

  NSString *audio=[NSString stringWithFormat:@"%@.mp3",cell.url];
  NSLog(@"url:%@",audio);

  NSURL  *url = [NSURL fileURLWithPath:audio];
  NSData *soundData = [NSData dataWithContentsOfURL:url];
  NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                               NSUserDomainMask, YES) objectAtIndex:0]
                          stringByAppendingPathComponent:@"sound.caf"];
    [soundData writeToFile:filePath atomically:YES];
    NSError *error;
    _audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL
                                                           fileURLWithPath:filePath] error:&error];
    [_audioPlayer play];
    NSLog(@"error %@", error);

Answer 1

尝试使用AVPlayer或AVPlayerViewController，可以直接使用URL播放mp3文件

即使使用本地文件，您也会先将其下载到设备，然后从本地播放 URL

不要忘记对象 AVPlayer 必须是 Class 的属性而不是本地对象，因为 auto-releasing，所以在 class 中声明播放器变量并在功能中设置，而不仅仅是在功能中设置并尝试播放...

[更新]

更多详细信息 -> How to play video with AVPlayerViewController (AVKit) in Swift

Answer 2

试试这个：

    //download your audio file
    NSString *urlString = @"http://www.smartivr.in/sounds/voicemail/download/f77245d9-e7ee-4424-850c-6a45022d0a54_1.mp3";
    NSURL  *url = [NSURL fileURLWithPath:urlString];
    NSData *soundData = [NSData dataWithContentsOfURL:url];
    NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                               NSUserDomainMask, YES) objectAtIndex:0]
                          stringByAppendingPathComponent:@"sound.caf"];
    [soundData writeToFile:filePath atomically:YES];

    // get the file from directory
    NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
    NSString *documentsDirectory = [pathArray objectAtIndex:0];
    NSString *soundPath = [documentsDirectory stringByAppendingPathComponent:@"sound.caf"];

    NSURL *soundUrl;
    if ([[NSFileManager defaultManager] fileExistsAtPath:soundPath])
    {
        soundUrl = [NSURL fileURLWithPath:soundPath isDirectory:NO];
    }

    // play audio file
    audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundUrl error:nil];
    [audioPlayer prepareToPlay];
    [audioPlayer play];

您应该异步下载音频文件。

Answer 3

这里是错误的

NSString *audio=[NSString stringWithFormat:@"%@.mp3",cell.url];
NSURL  *url = [NSURL fileURLWithPath:audio];

我假设它是一个远程文件 url，您不能将其视为一个文件 url。所以你必须使用

NSURL  *url = [NSURL urlWithString:audio];

Answer 4

谢谢 Dipankar Das 的帮助。我在这里发布整个解决方案。这绝对对我有用。

    NSString *audio=@"http://www.smartivr.in/sounds/voicemail/download/f77245d9-e7ee-4424-850c-6a45022d0a54_1.mp3";
    NSURL  *url = [NSURL URLWithString:audio];
    NSData *soundData = [NSData dataWithContentsOfURL:url];
    NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                               NSUserDomainMask, YES) objectAtIndex:0]
                          stringByAppendingPathComponent:@"sound.caf"];
    [soundData writeToFile:filePath atomically:YES];

    // get the file from directory
    NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
    NSString *documentsDirectory = [pathArray objectAtIndex:0];
    NSString *soundPath = [documentsDirectory stringByAppendingPathComponent:@"sound.caf"];

    NSURL *soundUrl;
    if ([[NSFileManager defaultManager] fileExistsAtPath:soundPath])
    {
        soundUrl = [NSURL fileURLWithPath:soundPath isDirectory:NO];
    }

    // plau audio file
    AVAudioSession *session = [AVAudioSession sharedInstance];
    [session setCategory:AVAudioSessionCategoryPlayback error:nil];
    _audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundUrl error:nil];
    [_audioPlayer prepareToPlay];
    [_audioPlayer play];
    [_audioPlayer setVolume:5.0];

从 URL 下载音频文件并在 iOS App 中播放

Download Audio file from URL and play it in iOS App

ios

objective-c

avaudioplayer