reusableView.swift

//個人介紹、貼文數、被追蹤數、追蹤數
    override func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
        let reusableCell = collectionView.dequeueReusableSupplementaryView(ofKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: PropertyKeys.header, for: indexPath) as! ProfileCollectionReusableView
        reusableCell.profileImageView.layer.cornerRadius = reusableCell.profileImageView.frame.height / 2
        
        if igdata != nil {
            reusableCell.profileName.text = igdata.graphql.user.full_name
//            reusableCell.postsNumLabel.text = "\(igdata.graphql.user.edge_owner_to_timeline_media.count)"
            reusableCell.postsNumLabel.text = postsNumConvert(igdata.graphql.user.edge_owner_to_timeline_media.count)
//            reusableCell.followersNumLabel.text = "\(igdata.graphql.user.edge_followed_by.count)"
            reusableCell.followersNumLabel.text = followerNumConvert(igdata.graphql.user.edge_followed_by.count)
//            reusableCell.followingNumLabel.text = "\(igdata.graphql.user.edge_follow.count)"
            reusableCell.followingNumLabel.text = followingNumConvert(igdata.graphql.user.edge_follow.count)
            reusableCell.biographyLabel.text = igdata.graphql.user.biography
            //抓圖的部分都移至main thread
            URLSession.shared.dataTask(with: igdata.graphql.user.profile_pic_url_hd) { (data, response, error) in
                if let data = data {
                    DispatchQueue.main.async {
                        reusableCell.profileImageView.image = UIImage(data: data)
                    }
                }
            }.resume()
        }