Swift MPMusicController播放/暂停API函数，无论是否接受媒体库权限

我们正在使用MPMusicController来播放短声音，但从iOS 13.4开始，由于info.plist中缺少NSAppleMusicUsageDescription键，应用程序开始崩溃

但是，在info.plist中添加键后，MPMusicController的播放/暂停API会触发“Apple Music权限”。现在，接受或拒绝许可不会影响通过MPMusicController播放的声音，这让我感到奇怪

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理想情况下，当权限被拒绝时，它不应运行，如果有人对此有想法或解释，我将不胜感激。

检查苹果音乐权限

 func appleMusicRequestPermission() -> Bool{

        var isAllowAccess: Bool = false

        switch SKCloudServiceController.authorizationStatus(){

        case .notDetermined:

            print("The user hasn't decided yet - so we'll break out of the switch and ask them.")
            let allow = self.askAppleMusicPermissio()
            isAllowAccess = allow
            break
        case .denied:
            print("The user has selected 'Don't Allow' in the past - so we're going to show them a different dialog to push them through to their Settings page and change their mind, and exit the function early.")
            isAllowAccess = false
            break
        case .restricted:
            print("User may be restricted; for example, if the device is in Education mode, it limits external Apple Music usage. This is similar behavior to Denied.")
            isAllowAccess = false

            break

        case .authorized:

            print("The user's already authorized - we don't need to do anything more here, so we'll exit early.")

            isAllowAccess = true
    
            break

        default:

            isAllowAccess = false
            break
        }

        return isAllowAccess
    }