Cannot use uiimageview as header title

[sariminapp]

I modified example data so it contains:
public var name: String public var imageURL: String public var items: [Item]

I can get imageURL string within this function:
func collapsibleTableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? { return sections[section].imageURL }

but when I change it to return uiimage, it cannot show any image from assets even I already put that image inside assets with same name like imageURL string.
this is my code:
private func collapsibleTableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> UIImage? { let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 20)) imageView.contentMode = .scaleAspectFit let image = UIImage(named: "\(sections[section].imageURL)") imageView.image = image return imageView.image }

How to show image within header title in section?

[EnesKaraosman]

you can use it in CollapsibleTableViewHeader class, just replace your arrowLabel with something similar to code below;

// Arrow Image View
contentView.addSubview(triangleImageView)
triangleImageView.translatesAutoresizingMaskIntoConstraints = false
// width constant
triangleImageView.widthAnchor.constraint(equalToConstant: 15).isActive = true
// aspectRatio - or you may use height constant as well
triangleImageView.heightAnchor.constraint(equalTo: triangleImageView.widthAnchor, multiplier: 1.15).isActive = true
triangleImageView.centerYAnchor.constraint(equalTo: marginGuide.centerYAnchor).isActive = true
triangleImageView.trailingAnchor.constraint(equalTo: marginGuide.trailingAnchor).isActive = true