UITableViewHeaderFooterView: Unable to change background color

Question

I\'m trying to change the background color of UITableViewHeaderFooterView. Although the view is appearing, the background color remains the default color. I\'m getting a log

Answer 1

iOS 12, Swift 5. If you are willing (or trying!) to use an appearance proxy, the following solution works:

1. Subclass UITableViewHeaderFooterView and expose your own appearance proxy setting.

final class MySectionHeaderView: UITableViewHeaderFooterView {
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    override init(reuseIdentifier: String?) {
        super.init(reuseIdentifier: reuseIdentifier)
    }

    @objc dynamic var forceBackgroundColor: UIColor? {
        get { return self.contentView.backgroundColor }
        set(color) {
            self.contentView.backgroundColor = color
            // if your color is not opaque, adjust backgroundView as well
            self.backgroundView?.backgroundColor = .clear
        }
    }
}

2. Set the appearance proxy at your desired granularity.

MySectionHeaderView.appearance().forceBackgroundColor = .red

or

MySectionHeaderView.appearance(whenContainedInInstancesOf: [MyOtherClass.self]).forceBackgroundColor = .red