swift UICollectionView点击和 vBg的点击

//
// MARK: - cell item点击和 vBg的点击冲突
//
extension FitlerView: UIGestureRecognizerDelegate {
    
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {

        //是UICollectionView、UITableView，返回NO则不再进行手势识别，方法触发等
        if let rst = touch.view?.isDescendant(of: cvList) {
            return !rst
        }
        
        return true
    }
}