如何让函数在 Swift 中播放不同的声音

Posted 2023-02-25

【中文标题】如何让函数在 Swift 中播放不同的声音

【英文标题】：How to make a function play different sounds in Swift

【发布时间】：2018-06-08 07:19:53

【问题描述】：

我有 10 个不同的按钮，每个按钮都有一个与之关联的唯一标签。所有按钮都链接到同一个 IBAction。我具有根据与单击的特定按钮关联的标签播放不同声音的功能。

import AVFoundation

var myAudio: AVAudioPlayer!

let path = Bundle.main.path(forResource: "sound1", ofType: "wav")!
let url = URL(fileURLWithPath: path)
do 
    let sound = try AVAudioPlayer(contentsOf: url)
    myAudio = sound
    sound.play()
     catch 
        //
    

【问题讨论】：

您的问题/问题是什么？

显示您的按钮操作代码

目前所有按钮播放相同的声音。我希望按钮根据单击的按钮播放不同的声音。

显示你尝试过的代码，给出答案很有用

我的声音播放代码写在上面。它包含在所有十个按钮的 IBAction 中。我想根据发送者按钮的标签更改“sound1”。

【参考方案1】：

喜欢

@objc func yourbtnActionName(_ sender : UIButton)

    switch sender.tag 
    case 1:
        commonSoundCode(name: "sound1")
        break
    case 2:
        commonSoundCode(name: "yoursecondSoundname")
        break
    default:
        break
    
   

那么常用的方法为

 func commonSoundCode(name: String)
    let path = Bundle.main.path(forResource: name, ofType: "wav")!
    let url = URL(fileURLWithPath: path)
    do 
        let sound = try AVAudioPlayer(contentsOf: url)
        myAudio = sound
        sound.play()
     catch 
        //
    

选项 2

如果你的声音文件的顺序相同，例如 (sound1.wav, sound2.wav......, sound10.wav) 然后调用类似

@objc func yourbtnActionName(_ sender : UIButton)
  let path = Bundle.main.path(forResource: "sound\(sender.tag)", ofType: "wav")!
    let url = URL(fileURLWithPath: path)
    do 
        let sound = try AVAudioPlayer(contentsOf: url)
        myAudio = sound
        sound.play()
     catch 
        //
    

【讨论】：

你应该避免使用0标签，因为这是所有视图的默认值。

player.prepareToPlay() 如果我将这行代码添加到 player.play() 上方，它将如何影响我的代码

@UtkarshSharma - 看到这个寻求帮助，***.com/questions/25503629/…

【参考方案2】：

你需要根据UIButton'stag简单地播放声音。

@IBAction func playsound(_ sender: UIButton)

    switch sender.tag
    
    case 0:
        //Sound for Button with tag=0
    case 1:
        //Sound for Button with tag=1
    default:
        //Default Sound
    

在上面的代码中，根据你的UIButtontags添加更多的case。

请添加更多代码以使您的问题更加清晰。

【参考方案3】：

import UIKit

//Mark: Do import AVFoundation is must here!

import AVFoundation

class ViewController: UIViewController 
    
//Mark: Create variable for AVAudioEngine! and AVAudioplayermode!
    
    var engine: AVAudioEngine!
    var audioPlayerNode : AVAudioPlayerNode!

//Mark: Create Variable for each tone as AVAudiofile!

    var Cs:AVAudioFile!
    var Ds:AVAudioFile!
    var Es:AVAudioFile!
    var Fs:AVAudioFile!
    var Gs:AVAudioFile!
    var As:AVAudioFile!
    var Bs:AVAudioFile!
    
    override func viewDidLoad() 
        super.viewDidLoad()

// Mark: Load engine
        
        engine = AVAudioEngine()
        
// Mark : Mention each sound
        
        Cs = try? AVAudioFile(forReading: NSURL.fileURL(withPath:
                   Bundle.main.path(forResource: "C", ofType: "wav")!))
        Ds = try? AVAudioFile(forReading: NSURL.fileURL(withPath:
                   Bundle.main.path(forResource: "D", ofType: "wav")!))
        Es = try? AVAudioFile(forReading: NSURL.fileURL(withPath:
                   Bundle.main.path(forResource: "E", ofType: "wav")!))
        Fs = try? AVAudioFile(forReading: NSURL.fileURL(withPath:
                   Bundle.main.path(forResource: "F", ofType: "wav")!))
        Gs = try? AVAudioFile(forReading: NSURL.fileURL(withPath:
                   Bundle.main.path(forResource: "G", ofType: "wav")!))
        As = try? AVAudioFile(forReading: NSURL.fileURL(withPath:
                   Bundle.main.path(forResource: "A", ofType: "wav")!))
        Bs = try? AVAudioFile(forReading: NSURL.fileURL(withPath:
                   Bundle.main.path(forResource: "B", ofType: "wav")!))
    
    
//Mark: create function(playSound) for connect AVAudioEngine and AVAudioplayermode for playing audio when button clicked
    
    func playSound(audioFile: AVAudioFile)  
        audioPlayerNode = AVAudioPlayerNode()
        if(audioPlayerNode.isPlaying)
            audioPlayerNode.stop()
        

        if(engine.isRunning)
            engine.stop()
            engine.reset()
        

        engine.attach(audioPlayerNode)

    engine.connect(audioPlayerNode, to: engine.mainMixerNode, format: audioFile.processingFormat)
    audioPlayerNode.scheduleFile(audioFile, at: nil, completionHandler: nil)

    // Start the audio engine
    engine.prepare()
    try! engine.start()

    audioPlayerNode.play()


//Mark: create required button for actions to connect function(playSound) and mention each sound  to button

    @IBAction func btnC(_ sender: UIButton) 
        playSound(audioFile: Cs)
    
    @IBAction func btnD(_ sender: UIButton) 
        playSound(audioFile: Ds)
    
 
    @IBAction func btnE(_ sender: UIButton) 
        playSound(audioFile: Es)
    
    
    @IBAction func btnF(_ sender: UIButton) 
        playSound(audioFile: Fs)
    
    @IBAction func btnG(_ sender: UIButton) 
        playSound(audioFile: Gs)
    
    
    @IBAction func btnA(_ sender: UIButton) 
        playSound(audioFile: As)
    
    
    @IBAction func btnB(_ sender: UIButton) 
        playSound(audioFile: Bs)