Question

我试图用AVAudioPlayer播放声音，但它不会奏效。

修改1：仍然无法正常工作。

编辑2 ：此代码有效。我的设备处于静音模式。

import UIKit
import AVFoundation

class ViewController: UIViewController {

    var audioPlayer = AVAudioPlayer()

    override func viewDidLoad() {
        super.viewDidLoad()

        var alertSound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("button-09", ofType: "wav"))
        println(alertSound)

        var error:NSError?
        audioPlayer = AVAudioPlayer(contentsOfURL: alertSound, error: &error)
        audioPlayer.prepareToPlay()
        audioPlayer.play()
    }
}

Answer 1

修改代码：

import UIKit
import AVFoundation

class ViewController: UIViewController {

    var audioPlayer = AVAudioPlayer()

    override func viewDidLoad() {
        super.viewDidLoad()

        var alertSound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("button-09", ofType: "wav"))
        println(alertSound)

        // Removed deprecated use of AVAudioSessionDelegate protocol
        AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, error: nil)
        AVAudioSession.sharedInstance().setActive(true, error: nil)

        var error:NSError?
        audioPlayer = AVAudioPlayer(contentsOfURL: alertSound, error: &error)
        audioPlayer.prepareToPlay()
        audioPlayer.play()
    }

}

Swift 3和Swift 4.1：

import UIKit
import AVFoundation

class ViewController: UIViewController {
    private var audioPlayer: AVAudioPlayer?

    override func viewDidLoad() {
        super.viewDidLoad()

        let alertSound = URL(fileURLWithPath: Bundle.main.path(forResource: "button-09", ofType: "wav")!)
        print(alertSound)

        try! AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
        try! AVAudioSession.sharedInstance().setActive(true)

        try! audioPlayer = AVAudioPlayer(contentsOf: alertSound)
        audioPlayer!.prepareToPlay()
        audioPlayer!.play()
    }
}

Answer 2

根据Swift 2，代码应为

public function read($length = 1024) {
    if (!$this->connected) {
        if (!$this->connect()) {
            return false;
        }
    }

    if (!feof($this->connection)) {
        $buffer = fread($this->connection, $length);
        $info = stream_get_meta_data($this->connection);
        if ($info['timed_out']) {
            $this->setLastError(E_WARNING, __d('cake_dev', 'Connection timed out'));
            return false;
        }
        return $buffer;
    }
    return false;
}

Answer 3

您的音频播放将在viewDidLoad完成后立即取消分配，因为您将其分配给本地变量。您需要为它创建一个属性来保持它。

Answer 4

解决方案适用于AudioPlayer，导航栏中的播放/暂停/停止按钮为条形按钮项

在Swift 2.1中，您可以使用以下代码

import UIKit
import AVFoundation

class ViewController: UIViewController {

    var player:AVAudioPlayer = AVAudioPlayer()

    override func viewDidLoad() {
            super.viewDidLoad()

            let audioPath = NSBundle.mainBundle().pathForResource("ARRehman", ofType: "mp3")
            var error:NSError? = nil
            do {
                player = try AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath: audioPath!))
            }
            catch {
                print("Something bad happened. Try catching specific errors to narrow things down")
            }

        }

    @IBAction func play(sender: UIBarButtonItem) {
        player.play()

    }


    @IBAction func stop(sender: UIBarButtonItem) {
        player.stop()
        print(player.currentTime)
        player.currentTime = 0
    }


    @IBAction func pause(sender: UIBarButtonItem) {

        player.pause()
    }


    @IBOutlet weak var sliderval: UISlider!


    @IBAction func slidermov(sender: UISlider) {

        player.volume = sliderval.value
        print(player.volume)
    }

}

Answer 5

这将有效.....

import UIKit
import AVFoundation

class ViewController: UIViewController {

    var ding:AVAudioPlayer = AVAudioPlayer()

    override func viewDidLoad() {
        super.viewDidLoad()

        prepareAudios()
        ding.play()
    }

    func prepareAudios() {

        var path = NSBundle.mainBundle().pathForResource("ding", ofType: "mp3")
        ding = AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath: path!), error: nil)
        ding.prepareToPlay()
    }
}

Answer 6

从Swift 4.2开始，AudioSession类别设置选项已更改。（尝试从Swift 4.2开始使用以下代码）

import UIKit
import AVFoundation


class ViewController: UIViewController {


    var audioPlayer: AVAudioPlayer?

    override func viewDidLoad() {
        super.viewDidLoad()
        prepareAudioSession()
    }


    func prepareAudioSession() -> Void {
        do {
            try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback, mode: AVAudioSession.Mode.default, options: AVAudioSession.CategoryOptions.defaultToSpeaker)
            try AVAudioSession.sharedInstance().setActive(true)

            prepareAudioPlayer()

        } catch {
            print("Issue with Audio Session")
        }
    }


    func prepareAudioPlayer() -> Void {

        let audioFileName = "test"
        let audioFileExtension = "mp3"

        guard let filePath = Bundle.main.path(forResource: audioFileName, ofType: audioFileExtension) else {
            print("Audio file not found at specified path")
            return
        }

        let alertSound = URL(fileURLWithPath: filePath)
        try? audioPlayer = AVAudioPlayer(contentsOf: alertSound)
        audioPlayer?.prepareToPlay()
    }


    func playAudioPlayer() -> Void {
        audioPlayer?.play()
    }


    func pauseAudioPlayer() -> Void {
        if audioPlayer?.isPlaying ?? false {
            audioPlayer?.pause()
        }
    }


    func stopAudioPlayer() -> Void {
        if audioPlayer?.isPlaying ?? false {
            audioPlayer?.stop()
        }
    }

    func resetAudioPlayer() -> Void {
        stopAudioPlayer()
        audioPlayer?.currentTime = 0
        playAudioPlayer()
    }

}

Answer 7

使用此功能在Swift中发出声音（您可以在想要发声的地方使用此功能。）

首先添加SpriteKit和AVFoundation Framework。

QWidget *

Answer 8

这是一个非常古老的问题，但我没有看到适用于Swift 3.0的答案，因此我对代码进行了现代化并添加了一些安全检查以防止崩溃。

我还采取了将播放部分拉出自己的功能的方法，以帮助重复使用这个答案的任何人。

import UIKit
import AVFoundation

class ViewController: UIViewController {
    var audioPlayer: AVAudioPlayer?

    override func viewDidLoad() {
        super.viewDidLoad()

        play(for: "button-09", type: "wav")
    }

    func play(for resource: String, type: String) {
        // Prevent a crash in the event that the resource or type is invalid
        guard let path = Bundle.main.path(forResource: resource, ofType: type) else { return }
        // Convert path to URL for audio player
        let sound = URL(fileURLWithPath: path)
        do {
            audioPlayer = try AVAudioPlayer(contentsOf: sound)
            audioPlayer?.prepareToPlay()
            audioPlayer?.play()
        } catch {
            // Create an assertion crash in the event that the app fails to play the sound
            assert(false, error.localizedDescription)
        }
    }
}

用AVAudioPlayer播放声音

8 个答案: