Error on sample code "Trailing closure passed to parameter of type 'CGFloat?' that does not accept a closure"

[fabien79]

I would like to draw an image based on a mp3
I Follow install your request and copy past your example

let waveformImageDrawer = WaveformImageDrawer()
let audioURL = Bundle.main.url(forResource: "example_sound", withExtension: "m4a")!
waveformImageDrawer.waveformImage(fromAudioAt: audioURL, with: .init(
size: topWaveformView.bounds.size,
style: .filled(UIColor.black),
position: .top) { image in
// need to jump back to main queue
DispatchQueue.main.async {
self.topWaveformView.image = image
}
})

but i've got this error on line 6 on the "{":
"Trailing closure passed to parameter of type 'CGFloat?' that does not accept a closure"

Can you give me advice to fix the problem please ?
Thanks in advance

[fabien79]

I test the Example code in the project, it's working, i don't understand.
Thanks