第三次停止播放音乐 ViewController - Swift 4

Question

我的第一个 ViewController 有一个简单的背景音乐循环，看起来像这样：

func setupMusic() {

    if audioEnabled == true {

        let soundFile = Bundle.main.path(forResource: "bgMusic", ofType: ".wav")

        do {
            try bgmusic = AVAudioPlayer (contentsOf: URL(fileURLWithPath: soundFile!))
        }  catch {
            print (error)
        }

        bgmusic.numberOfLoops = -1
        bgmusic.volume = 0.3
        bgmusic.play()

    }
}

我想知道如何阻止这个循环背景音乐在另一个场景中播放，在我的例子中 - 当用户选择静音按钮时的 "User Settings" 屏幕。

bgmusic.stop() \ Wont work because the object 'bgmusic' is not instantiated in the new scene?

Answer 1

选项 1

class Service {

   static let shared = Service()
    var gmusic :AVAudioPlayer?
}

try Service.shared.gmusic = AVAudioPlayer (contentsOf: URL(fileURLWithPath: soundFile!))

然后使用

Service.shared.gmusic?.stop()

选项 2

在 CurrentVC

 let settingsVc = //

 settingsVc.delegate = self

 present(settingsVc

//

 calss SettingsVC:UIViewController {

    var delegate:CurrentVC?

    func stop () {

     delegate?.gmusic.stop()

 }

第三次停止播放音乐 ViewController - Swift 4

Stop playing music on third ViewController - Swift 4

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