I have an URL which I get from JSON response, When I hit the URL in browser the file is downloaded, Now am wondering how can I play such URL which is a Download URL.I've been looking around many post But none of them could help me.

我有一个URL，我是从JSON响应中得到的，当我在浏览器中点击URL时，文件就被下载了，现在我想知道如何才能播放这样的URL，这是一个下载URL。我已经看了很多帖子，但没有一个能帮助我。

type of url am getting : http://www.smartivr.in/sounds/voicemail/download/f77245d9-e7ee-4424-850c-6a45022d0a54_1

我获取的URL类型：http://www.smartivr.in/sounds/voicemail/download/f77245d9-e7ee-4424-850c-6a45022d0a54_1

Below is the code I tried.

下面是我尝试过的代码。

  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);

Try this:

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];

You should download your audio file asynchronously.

您应该异步下载您的音频文件。

try use AVPlayer or AVPlayerViewController, you can use direct URL to play mp3 files

尝试使用AVPlayer或AVPlayerViewController，您可以使用直接URL播放mp3文件

even with local file as you will first download it to device, then play from local URL

即使是本地文件，您也会先将其下载到设备，然后从本地URL播放

do not forget that object AVPlayer has to be as property of your Class not local object because of auto-releasing, so declare your player variable in class and set in function not just locally in function and try to play ...

不要忘记，由于自动释放，对象AVPlayer必须作为你的类的属性而不是本地对象，所以在类中声明你的播放器变量，并在函数中设置函数，而不仅仅是在函数中本地设置，然后尝试玩…

[update]

[更新]

more details how to do it -> How to play video with AVPlayerViewController (AVKit) in Swift

更多详细操作->如何在SWIFT中使用AVPlayerViewController(AVKit)播放视频

Thank You Dipankar Das for you help.
I am posting the whole solution here.
which worked for me absolutely.

感谢Dipankar Das的帮助。我在这里发布了整个解决方案。这对我来说绝对管用。

    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];

Here is the mistake

以下是错误所在

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

I assume that it is a remote url and you cannot treat it as a file url. So you must use

我假设它是一个远程url，您不能将其视为文件url。所以你必须使用

NSURL  *url = [NSURL urlWithString:audio];

Just use AVPlayer instead of AVAudioPlayer

只需使用AVPlayer而不是AVAudioPlayer

@property (nonatomic, strong) AVPlayer *player;

AVURLAsset *asset = [AVURLAsset assetWithURL:[NSURL URLWithString:@"https://audio-ssl.itunes.apple.com/apple-assets-us-std-000001/AudioPreview18/v4/9c/db/54/9cdb54b3-5c52-3063-b1ad-abe42955edb5/mzaf_520282131402737225.plus.aac.p.m4a"]];

    // Create player item
    
AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithAsset:asset];

self.player = [[AVPlayer alloc] initWithPlayerItem:playerItem];
    
[self.player seekToTime:kCMTimeZero];

[self.player play];