用AVAudioPlayer播放声音

Question

我正试图播放声音,AVAudioPlayer但它无法正常工作.

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()
    }
}

Answer 1

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()
    }
}

Answer 2

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")
    }
}

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,它在导航栏中具有播放/暂停/停止按钮作为条形按钮项

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()
    }
}