如何自定义音量调节条

记录

在VC中新增如下代码

 // Add MPVolumeView in a holder view
        let mpVolumeHolderView = UIView(frame: CGRect(x: 0, y: 0, width: view.bounds.width, height: view.bounds.height))
         // Set the holder view’s background color to transparent
         mpVolumeHolderView.backgroundColor = .clear
        let mpVolume = MPVolumeView(frame: mpVolumeHolderView.bounds)
        mpVolume.showsRouteButton = true
        mpVolumeHolderView.addSubview(mpVolume)
        view.addSubview(mpVolumeHolderView)
        // the volume view is white, set the parent background to black to show it better in this example
        view.backgroundColor = .black

如果要隐藏，就加入一个延时
伪代码

....setVolume(1, animate: false)