先将资源文件添加到工程中，如下代码为播放代码

class ViewController: UIViewController {
override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

//MARK:- 音效播放

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    print("开始播放音效")
    //1.获取systemSoundId：Creates a system sound object.
    let url =  Bundle.main.url(forResource: "m_17.wav", withExtension: nil)
    let urlCF = url! as CFURL
    //1.1 创建SystemSoundId
    var soundID : SystemSoundID = 0
    AudioServicesCreateSystemSoundID(urlCF, &soundID)
    //2.根据soundId,播放音效
      //带有震动播放效果
  // AudioServicesPlayAlertSound(soundID)
      //不带有震动播放
//AudioServicesPlaySystemSound(soundID)
   //带有回调函数的播放
    AudioServicesPlaySystemSoundWithCompletion(soundID) {
        //3.根据soundId，释放音效
        print("根据soundId，释放音效")
        AudioServicesDisposeSystemSoundID(soundID)
    }
 }
    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    print("结束播放音效")
}
}

封装后的音频播放方法

//  Audio_Extension.swift
import UIKit
import AVFoundation

//类方法
class AudioTool: NSObject {
class func audioPlay(audioName:String,isAlert:Bool,inCompletion:@escaping ()->()){
//1.获取systemSoundId：Creates a system sound object.
let url =  Bundle.main.url(forResource: audioName, withExtension: nil)
let urlCF = url! as CFURL
//1.1 创建SystemSoundId
var soundID : SystemSoundID = 0
AudioServicesCreateSystemSoundID(urlCF, &soundID)
//2.根据soundId,播放音效
    if isAlert {
        AudioServicesPlayAlertSoundWithCompletion(soundID) {
            //3. 根据soundId,释放音效
            AudioServicesDisposeSystemSoundID(soundID)
            //4.告诉外界播放完成的事件
            inCompletion()
        }
    }else {
        AudioServicesPlaySystemSoundWithCompletion(soundID) {
            //3.根据soundId，释放音效
            AudioServicesDisposeSystemSoundID(soundID)
            //4.告诉外界播放完成的事件
            inCompletion()
        }
        
    }
 }
}

外界调用

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    print("开始播放音效")
    AudioTool.audioPlay(audioName: "m_17.wav", isAlert: false) {
        print("成功释放")
    }
}