用 AVAudioPlayer 播放声音-Java 学习之路

我试图用AVAudioPlayer播放声音，但它不起作用。

**编辑 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()
    }
}

8 回答

使用此功能在 Swift 中发出声音(您可以在此处使用此功能 sound.)

首先添加 SpriteKit 和 AVFoundation Framework。

import SpriteKit
import AVFoundation
func playEffectSound(filename: String){
     runAction(SKAction.playSoundFileNamed("\(filename)", waitForCompletion: false))
}// use this function to play sound

playEffectSound("Sound File Name With Extension")
// Example :- playEffectSound("BS_SpiderWeb_CollectEgg_SFX.mp3")

回复于 2024-04-24T03:16:46+08:00

对您的代码进行了修改：

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()
    }
}

回复于 2024-04-24T03:16:46+08:00

根据 Swift 2，代码应该是

var audioPlayer : AVAudioPlayer!

func playSound(soundName: String)
{
    let coinSound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource(soundName, ofType: "m4a")!)
    do{
        audioPlayer = try AVAudioPlayer(contentsOfURL:coinSound)
        audioPlayer.prepareToPlay()//there is also an async version
        audioPlayer.play()
    }catch {
        print("Error getting the audio file")
    }
}

回复于 2024-04-24T03:16:46+08:00

23

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。

回复于 2024-04-24T03:16:46+08:00

解决方案适用于 AudioPlayer，导航栏中的 play/pause/stop 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)
    }

}

回复于 2024-04-24T03:16:46+08:00

这将工作.....

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()
    }
}

回复于 2024-04-24T03:16:46+08:00

Swift 4.2 以后，AudioSession 类别设置选项已更改。 (尝试使用以下 Swift 4.2 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()
    }

}

回复于 2024-04-24T03:16:46+08:00

这是一个非常古老的问题，但我没有看到一个适用于 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到自己的功能中的方法，以便为遇到这个答案的任何人提供 re-use 帮助。

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)
        }
    }
}

回复于 2024-04-24T03:16:46+08:00

用 AVAudioPlayer 播放声音

8 回答

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