ios 使用 AVAudioPlayer 播放声音

Playing a sound with AVAudioPlayer

提问by user3722523

I'm trying to play a sound with AVAudioPlayerbut it won't work.

我正在尝试播放声音，AVAudioPlayer但它不起作用。

Edit 1:Still doesn't work.

编辑1：仍然不起作用。

Edit 2: This code works. My device was in silent mode.

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()
    }
}

采纳答案by vladof81

Made modification to your code:

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 and Swift 4.1:

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()
    }
}

回答by Estevex

As per Swift 2 the code should be

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")
    }
}

回答by rdelmar

Your audio play will be deallocated right after viewDidLoad finishes since you assign it to a local variable. You need to create a property for it to keep it around.

您的音频播放将在 viewDidLoad 完成后立即解除分配，因为您将其分配给了一个局部变量。你需要为它创建一个属性来保存它。

回答by Naishta

The solution is for AudioPlayer which has play/pause/stop button in the navigation bar as bar button items

解决方案适用于在导航栏中具有播放/暂停/停止按钮作为条形按钮项的 AudioPlayer

In Swift 2.1 you can use the below code

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)
    }

}

回答by Chetan Prajapati

This will work.....

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()
    }
}

回答by Rex

Use This Function to make sound in Swift (You can use this function where you want to make sound.)

使用此函数在 Swift 中发出声音（您可以在要发出声音的地方使用此函数。）

First Add SpriteKit and AVFoundation Framework.

首先添加 SpriteKit 和 AVFoundation 框架。

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")

回答by CodeBender

This is a pretty old question, but I did not see an answer that worked with Swift 3.0 so I modernized the code and added some safety checks to prevent crashes.

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改造并添加了一些安全检查以防止崩溃。

I also took the approach of pulling the playing part out into its own function to help with re-use for anyone coming across this answer.

我还采取了将播放部分提取到自己的功能中的方法，以帮助遇到此答案的任何人重新使用。

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)
        }
    }
}

回答by Krunal

Swift 4.2 onwards, AudioSession category setup options have been changed. (Try following code for Swift 4.2 onwards)

从 Swift 4.2 开始，AudioSession 类别设置选项已更改。（从 Swift 4.2 开始尝试以下代码）

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()
    }

}