将自定义单元格插入 TableView

Question

I have a UITableView that populates custom cells based on incoming data:

var posts: [PostViewModel] = [] {
        didSet {
            DispatchQueue.main.async {
                self.tableView.reloadData()
            }
        }
    }

I'd like to insert a different custom cell that has nothing to do with the array ie a reminder for the user to subscribe or login. The Index Path set should look like this for example:

1. Post Cell
2. Post Cell
3. Post Cell
4. Login Cell
5. Post Cell
6. etc...

How would I go about this approach as the cell has nothing to do with the model.

Thanks.

Answer 1

From my practice it is better to create custom type of cell. And add this type as a property to your PostViewModel. After that you can recognize what type of cell you should to dequeue. For example:

// Type of custom cell
enum PostsType {
    case postCell
    case loginCell
}

struct PostViewModel {
    let type: PostsType
    // another View model data
}

class ViewController: UITableViewController {

    var posts: [PostViewModel] = [] {
        didSet {
            DispatchQueue.main.async {
                self.tableView.reloadData()
            }
        }
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        posts.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cellType = posts[indexPath.row].type

        switch cellType {
        case .loginCell:
            return tableView.dequeueReusableCell(withIdentifier: "LoginCell", for: indexPath)
        case .postCell:
            return tableView.dequeueReusableCell(withIdentifier: "PostCell", for: indexPath)
        }
    }
}