code.swift

import LinkPresentation

// ...

let provider = LPMetadataProvider()
provider.startFetchingMetadata(for: url) { metadata, error in
  guard
    let metadata = metadata,
    error == nil
    else { return }
  
  DispatchQueue.main.async { [weak self] in
    guard let self = self else { return }
                            
    let linkView = LPLinkView(metadata: metadata)
                            
    self.myStackView.addArrangedSubview(linkView)
    linkView.sizeToFit()
  }
}