c# - Xamarin C# 一个 UITableView 中的两个 UITableViewCells

Question

我想把两个不同的 UITableViewCell合二为一UITableView然而，当我尝试将数据加载到 TableSource 中时它只允许我发送一个 List<>一次。但是我需要两个 List<>用于显示我的两个单元格。我的 TableSource.cs 中的两个列表类是名为 instaData 和 faceData 的公共(public)变量。当我运行获取 instaData 和 faceData 的个人请求时，它可以完美运行。更好地展示然后解释:

请求 InstaData

var client = new RestClient ("https://api.instagram.com/v1");
    client.ExecuteAsync (request, response => {
        var rootObject = JsonConvert.DeserializeObject<RootObject> (response.Content);
        InstagramObject.next_url = rootObject.pagination.next_url.ToString();
        FLDTRequest.instagramDataCopy = rootObject.data;
        table.InvokeOnMainThread (() => {
        table.Source = new TableSource(stream);
        ((TableSource)table.Source).instaData = rootObject.data;
        table.ReloadData ();
        });
    });

请求人脸数据

var client = new RestClient ("https://graph.facebook.com/");
                client.ExecuteAsync (request, response => {
                    var rootObject = JsonConvert.DeserializeObject<Floadt.Core.Facebook.RootObject> (response.Content);
                    FLDTRequest.facebookDataCopy = rootObject.data;
                    table.InvokeOnMainThread (() => {
                        table.Source = new TableSource(stream);
                        ((TableSource)table.Source).faceData = rootObject.data;
                        table.ReloadData ();
                    });
                });

基本上，当我想获取两个数据时，我会调用这两个方法，但我通常会从最后调用的方法中得到一个错误，说该对象不是引用。例如:如果我最后调用 faceData 请求，它会说 Object is not a reference。这是我的 TableSource类:

public class TableSource : UITableViewSource 
{
    StreamViewController controller;

    public List<Datum> instaData { get; set; }
    public List<string> twitData { get; set; }
    public List<Floadt.Core.Facebook.Datum> faceData { get; set; }

    public TableSource(StreamViewController stream)
    {
        controller = stream;
    }

    public override int RowsInSection (UITableView tableview, int section)
    {
        return faceData.Count;
    }

    public override float GetHeightForRow(UITableView tableView, NSIndexPath indexPath)
    {
        if (indexPath.Row % 2 == 0) {
            return 340;
        } else {
            return 436;
            //return 210;
        }
    }

    public override UITableViewCell GetCell (UITableView tableView, MonoTouch.Foundation.NSIndexPath indexPath)
    {
        if (indexPath.Row % 2 == 0) {
            NetworkCheck netCheck = new NetworkCheck ();
            netCheck.runCheck ();
            // bool log = netCheck.anyLoggedIn ();

            if (tableView.ContentSize.Height - UIScreen.MainScreen.Bounds.Height <= tableView.ContentOffset.Y) {
                BTProgressHUD.Show ("Getting more...");
                FLDTRequest.getInstagramNextPage (tableView);
                BTProgressHUD.Dismiss ();
            }

            var cell = tableView.DequeueReusableCell (InstagramCell.Key) as InstagramCell;

            if (cell == null) {
                cell = new InstagramCell ();
                var views = NSBundle.MainBundle.LoadNib ("InstagramCell", cell, null);
                cell = Runtime.GetNSObject (views.ValueAt (0)) as InstagramCell;
            }

            //Datum h = instaData [indexPath.Row/2];
            //cell.BindData (h);

            return cell;

        } else {
            NetworkCheck netCheck = new NetworkCheck ();
            netCheck.runCheck ();
            // bool log = netCheck.anyLoggedIn ();

            if (tableView.ContentSize.Height - UIScreen.MainScreen.Bounds.Height <= tableView.ContentOffset.Y) {
                BTProgressHUD.Show ("Getting more...");
                FLDTRequest.getInstagramNextPage (tableView);
                BTProgressHUD.Dismiss ();
            }


            var cell = tableView.DequeueReusableCell (FacebookCell.Key) as FacebookCell;

            if (cell == null) {
                cell = new FacebookCell ();
                var views = NSBundle.MainBundle.LoadNib ("FacebookCell", cell, null);
                cell = Runtime.GetNSObject (views.ValueAt (0)) as FacebookCell;
            }

            var fbPhotoCell = tableView.DequeueReusableCell (FacebookPhotoCell.Key) as FacebookPhotoCell;

            if (fbPhotoCell == null) {
                fbPhotoCell = new FacebookPhotoCell ();
                var views = NSBundle.MainBundle.LoadNib ("FacebookPhotoCell", cell, null);
                fbPhotoCell = Runtime.GetNSObject (views.ValueAt (0)) as FacebookPhotoCell;
            }

            Floadt.Core.Facebook.Datum f = faceData [indexPath.Row/2];

            fbPhotoCell.BindData (f);
            return fbPhotoCell;
        }   
    }
}

Answer 1

看起来您正在尝试设置 table.Source 两次，每个 List 一次？您需要将您的列表合并到一个数据源中，并创建一个可以可视化两种数据类型的 UITableViewCell。