How can I create a waveform image from an audio file using Swift? [on hold]

I'm looking for a way to generate a waveform image from an audio file for an iOs app using Swift.



Something like this: SCWaveformView



I found this fantastic tutorial, and I'm attempting to "convert" it to Swift, but I'm such a newbie that it's proving to be quite the task. Having a well-coded library would be fantastic.