在iOS13.1上播放音频时，应用崩溃 [英] App crashes when playing audio on iOS13.1

问题描述

我正在构建一个应用程序，该应用程序使用URL从主捆绑包中运行声音文件.当我在iOS 13上进行测试时，一切都很好.但是，随着新的13.1更新，我在代码行中出现了错误

I am building an app that runs sound files from within the main bundle with a url. When I tested this on iOS 13, everything is fine. But with the new update of 13.1 I am getting an error here on the line of code

backgroundMusicPlayer =尝试AVAudioPlayer(contentsOf:URL(fileURLWithPath:sound！))

backgroundMusicPlayer = try AVAudioPlayer(contentsOf: URL(fileURLWithPath: sound!))

说:

线程1:EXC_BAD_ACCESS(代码= 1，地址= 0x48

Thread 1: EXC_BAD_ACCESS (code=1, address=0x48

这是我在自定义类中使用的代码，该类在应用启动时运行背景音乐:

Here is the code that I am using in a custom class that runs background music when the app launches:

import Foundation
import AVFoundation

var backgroundMusicPlayer = AVAudioPlayer()

func playBackgroundMusic(filename: String){
let  sound = Bundle.main.path(forResource: filename, ofType: "m4a")

do{
    try     
AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback, mode: AVAudioSession.Mode.default, options: [AVAudioSession.CategoryOptions.mixWithOthers])
    backgroundMusicPlayer = try AVAudioPlayer(contentsOf: URL(fileURLWithPath: sound!))

}catch{
    print (error)
}
backgroundMusicPlayer.numberOfLoops = -1
backgroundMusicPlayer.prepareToPlay()
backgroundMusicPlayer.play()
}

这一切在iOS13上的模拟器中都可以正常运行，但是在运行13.1的设备上崩溃似乎是问题所在，但我不确定为什么.在其他屏幕上，按钮正在触发捆绑软件中的音频文件时，也会发生相同的行为.

This all works fine in the simulator on iOS13, but crashes on a device running 13.1 It appears that the url is the issue, but I am not sure why. This same behavior happens on other screens where buttons are triggering audio files from the bundle.

推荐答案

更改此内容:

var backgroundMusicPlayer = AVAudioPlayer()

对此:

var backgroundMusicPlayer : AVAudioPlayer!

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