A Swift UIButton extension to ensure the hit-zone is at least 44x44

MinimumTouchAreaButton.swift

import UIKit

class MinimumTouchAreaButton: UIButton {
    override func hitTest(_ point: CGPoint, with _: UIEvent?) -> UIView? {
        guard !isHidden, isUserInteractionEnabled, alpha > 0 else {
            return nil
        }
        let expandedBounds = bounds.insetBy(dx: min(bounds.width - 44.0, 0), dy: min(bounds.height - 44.0, 0))
        return expandedBounds.contains(point) ? self : nil
    }
}

I guess you should apply inset divided by two to get a 44 x 44 square

let expandedBounds = bounds.insetBy(dx: min(bounds.width - 44.0, 0) / 2, dy: min(bounds.height - 44.0, 0) / 2)