ios - 变量闭包初始化问题

Question

在我的类(class)中，我有一个属性是一种 audioPlayer，我打算像这样在闭包中完成设置工作:

var urlPath = Bundle.main.url(forResource: "Focus", withExtension: "mp3")!

var audioPlayer:AVAudioPlayer = { var player =  try! AVAudioPlayer.init(contentsOf: urlPath)

    return player }()

Instance member 'urlPath' cannot be used on type 'BackgroundAudio'

我不太明白我的代码有什么问题？如何解决这个问题，提前致谢。

Answer 1

试试这个:

import AudioToolbox 
 import AVFoundation

let url = Bundle.main.url(forResource: "Focus", withExtension: "mp3")!

    do {
        player = try AVAudioPlayer(contentsOf: url)
        guard let player = player else { return }

        player.prepareToPlay()
        player.play()
    } catch let error as NSError {
        print(error.description)
    }