swift - 有谁知道如何快速修复 Do-Try-Catch 错误代码= EXC_1386_INVOP ？

Question

当我尝试添加音频文件时，我正在快速编写计算器应用程序，我将其放在计算编程之上:

var player:AVAudioPlayer = AVAudioPlayer()

@IBAction func play(_ sender: UIButton)
{
    player.play()
}

在下面的 View 中确实加载了我放置的这个。请提供任何帮助!

override func viewDidLoad() {
    super.viewDidLoad()
    //Do any additional setup after loading the view, typically from a nib.
    do
    {
        let audioPath = Bundle.main.path(forResource: "song", ofType: "mp4")
        try player = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPath!) as URL)
    }
    catch
    {
        // error
        abort()
    }

}

Answer 1

您正在检索路径而不是 URL...其次您尝试语法错误...尝试此代码

 do
{
    let audioPath = Bundle.main.url(forResource: "song", withExtension: "mp4")
    player = try AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPath!) as URL)
}
catch
{