iOS stackView 내 subview UI 변경

 let subview = commentStackView.subviews[index]
    for sub in subview.subviews {
        if let imageView = sub.viewWithTag(100) as? UIImageView {
            imageView.image = UIImage(named: "Vector (6)")
        }
        if let label = sub.viewWithTag(101) as? UILabel {
            var count = Int(label.text ?? "0") ?? 0
            count -= 1
            label.text = "\(count)"
            label.textColor = Colors.POST_ITEM_LIKE_COUNT
        }
    }

stackview를 그릴때 tag를 넣어준뒤 서브뷰를 찾아 UI를 변경해준다.