Background thread rendering about dswaveformimage HOT 3 CLOSED

let bounds = middleWaveformView.bounds
DispatchQueue.global(qos: .userInteractive).async {
    let bottomWaveformImage = waveformImageDrawer.waveformImage(fromAudioAt: audioURL,
                                                                size: bounds.size,
                                                                color: UIColor.blue,
                                                                backgroundColor: UIColor.lightGray,
                                                                style: .filled,
                                                                position: .custom(0.9),
                                                                paddingFactor: 5.0)
    DispatchQueue.main.async {
        self.bottomWaveformView.image = bottomWaveformImage
    }
}

let waveform = Waveform(audioAssetURL: audioURL)!
let configuration = WaveformConfiguration(size: lastWaveformView.bounds.size,
                                          color: UIColor.blue,
                                          style: .striped,
                                          position: .bottom)
        
DispatchQueue.global(qos: .userInteractive).async {
    let image = UIImage(waveform: waveform, configuration: configuration)
    DispatchQueue.main.async {
        self.lastWaveformView.image = image
    }
}