Question

如何在不下载设备上的mp3文件的情况下从Swift中的URL流式传输音频？我需要导入什么？我需要某些图书馆吗？在info.plist中添加任何内容？请评论您的代码。

Answer 1

您可以使用iOS AVPLayer从网址流式传输音频。

var player: AVPlayer!
let url  = URL.init(string:   "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3")

let playerItem: AVPlayerItem = AVPlayerItem(url: url!)
player = AVPlayer(playerItem: playerItem)

let playerLayer = AVPlayerLayer(player: player!)

playerLayer?.frame = CGRect(x: 0, y: 0, width: 10, height: 50)
        self.view.layer.addSublayer(playerLayer!)
player.play()

Answer 2

我用您的网址对其进行了测试，并且可以正常工作

    var player: AVPlayer?
    let url = "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3"
    let playerItem = AVPlayerItem( url:NSURL( string:url )! as URL )
    player = AVPlayer(playerItem:playerItem)
    player!.rate = 1.0;

        player!.play()

Answer 3

对于在线流媒体，您必须使用AVFoundation框架。

var player: AVPlayer!

let url = URL.init(string: "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3")
player = AVPlayer.init(url: url!)

玩：

    player.play()

暂停：

    player.pause()

Answer 4

可以在这里

 import AVFoundation

var progressTimer:Timer?
{
    willSet {
        progressTimer?.invalidate()
    }
}
var playerStream: AVPlayer?
var playerItem: AVPlayerItem?

func playerStream(urlStream : String)
{
    if let playerStream = playerStream
    {
        if playerStream.isPlaying
        {
            stopProgressTimer()
            playerStream.pause()

        }
        else
        {

            startProgressTimer()
            playerStream.play()
        }

    }
    else
    {
        if let urlStr = urlStream.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
        {

            if let TempURL = URL.init(string: urlStr)
            {
                playerItem  = AVPlayerItem(url: TempURL)
                playerStream = AVPlayer(playerItem: playerItem)
                NotificationCenter.default.addObserver(self, selector: #selector(playerItemDidPlayToEndTime), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: playerItem)
            }

        }

    }

}

func playerItemDidPlayToEndTime() {

     stopProgressTimer()
     self.playProgressView.progress = 0.0
    if let playerStream = self.playerStream
    {
        playerStream.replaceCurrentItem(with: playerItem)
        playerStream.seek(to: kCMTimeZero)
       // playerStream.seek(to: .zero) swift 4.0
    }


}
func stopProgressTimer() {
    progressTimer?.invalidate()
    progressTimer = nil
}
func startProgressTimer()
{
    if #available(iOS 10.0, *) {

        progressTimer = Timer.scheduledTimer(withTimeInterval: 0.1, repeats: true){_ in

            self.updateProgressTimer()
        }
    }
    else {

        progressTimer = Timer.scheduledTimer(timeInterval: 1.0, target: self, selector: #selector(self.updateProgressTimer), userInfo: nil, repeats: true)
    }
}


@objc func updateProgressTimer()
{
    if let playerItem = playerItem
    {
        if let pa = playerStream
        {
            let floatTime = Float(CMTimeGetSeconds(pa.currentTime()))
            let floatTimeDu = Float(CMTimeGetSeconds(playerItem.duration))

            playProgressView.progress = Double(floatTime / floatTimeDu)
        }
    }
}

Answer 5

$Pattern = @('nature|kite|venue|street|venture')
$Test = (Get-Content -Path .\file.txt | Select-String -Pattern $Pattern -AllMatches)
$Test = foreach {$_.matches.Value}
$t = $Pattern -split('\|')|where{$Test -notcontains $_}

该课程将在后台播放音乐并播放任何音频视频网址。

Answer 6

fetch(forecast)
    .then(response => {
        return response.json();
    })
    .then(data => {
        console.log(data);
        
        data.list.forEach(list => {
            
            const iconId = list.weather[0].id;

            
            const days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
            const d = new Date(data.list[0].dt * 1000);
            const dayName = days[d.getDay()];
            console.log(dayName)

            // Generate and append html elements on the page
            const container = document.querySelector('.container');
            
            const forecastCard = document.createElement('div');
            container.appendChild(forecastCard)
            forecastCard.classList.add('forecast-card')

            const date = document.createElement('h2');
            date.textContent = dayName;
            forecastCard.appendChild(date);
            date.classList.add('date');

            const currentTemp = document.createElement('p');
            currentTemp.textContent = list.main.temp;
            forecastCard.appendChild(currentTemp);
            currentTemp.classList.add('current-temp');
            
            const icon = document.createElement('img');
            icon.src = `./icons/${list.weather[0].icon}.png`;
            forecastCard.appendChild(icon);
            icon.classList.add('icon');
            
            const conditions = document.createElement('p');
            conditions.textContent = list.weather[0].description;
            forecastCard.appendChild(conditions);
            conditions.classList.add('conditions');
            
            const humidity = document.createElement('p');
            humidity.textContent = `Humidity: ${list.main.humidity}%`;
            forecastCard.appendChild(humidity);
            humidity.classList.add('humidity');
            
    })
                    
    });

应该

    func playAudioBackground() {
        do {
            try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback, mode: AVAudioSession.Mode.default, options: [.mixWithOthers, .allowAirPlay])
            print("Playback OK")
            try AVAudioSession.sharedInstance().setActive(true)
            print("Session is Active")
        } catch {
            print(error)
        }
    }

因为 .allowAirPlay 不允许与 AVAudioSession.Category.playback 一起使用，并且会导致真实设备抛出异常。它在模拟器上运行良好，但在设备上运行良好，因此您的音频会话将无法正确配置。

我本来会回复的，但我的名声不够高，无法...

如何从URL流式传输音频而无需在设备上下载mp3文件

6 个答案: