1.必须要用 AVAudioSession，否则木有声音啊。2.不要把 AVAudioPlayer 当做局部变量，要定义成全局变量3.要找好路径，这里用 mainBundle，不要搞错。复制代码

private func playMusic() {                let musicPath = Bundle.main.path(forResource: "money", ofType: "mp3")        let fileUrl = NSURL.fileURL(withPath: musicPath ?? " ")        do {            let session = AVAudioSession.sharedInstance()            try session.setCategory(AVAudioSessionCategoryPlayback)            try session.setActive(true)            audioPlay = try AVAudioPlayer.init(contentsOf: fileUrl)            audioPlay.numberOfLoops = 0            audioPlay.volume = 0.5            audioPlay.currentTime = 0            audioPlay.prepareToPlay()            audioPlay.play()        }        catch {            debugLog(error)        }    }复制代码