通过segue跳转

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

        if segue.identifier == "SegueDetail" {

            let vc = segue.destination as? PostDetailViewController

            vc?.post = sender as? Post

        }

    }

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

        collectionView.deselectItem(at: indexPath, animated: true)

        

        let post = posts![indexPath.item]

        performSegue(withIdentifier: "SegueDetail", sender: post)

    }