Pinterest风格布局iOS故事板

Question

我想创建一个这样的设计： -

我正在使用故事板，我不能让这件事工作。我现在有一个简单的集合视图，它工作正常，除了所有单元格出现两次。有没有办法通过不使用任何库并具有随机高度来实现这一目标？

这是我的故事板： -

Mycollectioncontroller

public MyCollectionController(IntPtr handle) : base(handle)
{

}

public override void ViewDidLoad ()
{
    base.ViewDidLoad ();
    data = MakeDataForRecyclerView(pageIndex);
}

public override nint NumberOfSections (UICollectionView collectionView)
{
    return 1;
}

public override nint GetItemsCount(UICollectionView collectionView, nint section)
{
    return data.Length;
}

public override void ItemSelected (UICollectionView collectionView, NSIndexPath indexPath)
{
    var message = string.Format ("You clicked on {0}!", cell.Title);
    new UIAlertView ("Clicked", message, null, "Okay", null).Show ();
}

public override UICollectionViewCell GetCell (UICollectionView collectionView, NSIndexPath indexPath)
{
    cell = (MyCollectionCell) collectionView.DequeueReusableCell ("My_Collection_Cell", indexPath);
    var tag = data[indexPath.Row];
    cell.PopulateData (tag.Title, tag.ThumbnailPath);
    return cell;
}

public override void ItemHighlighted(UICollectionView collectionView, NSIndexPath indexPath)
{
    var cell = collectionView.CellForItem(indexPath);
    cell.ContentView.BackgroundColor = UIColor.Yellow;
}

public override void ItemUnhighlighted(UICollectionView collectionView, NSIndexPath indexPath)
{
    var cell = collectionView.CellForItem(indexPath);
    cell.ContentView.BackgroundColor = UIColor.White;
}

public override bool ShouldHighlightItem(UICollectionView collectionView, NSIndexPath indexPath)
{
    return true;
}

private Models.DummyModel[] MakeDataForRecyclerView(int startPosition)
{
    List<Models.DummyModel> listOf4Item = new List<Models.DummyModel>();

    for (int i = startPosition * 4; i < Math.Min((4 * startPosition) + 4, AppDelegate.myList.Count); i++)
    {
        listOf4Item.Add(AppDelegate.myList.ElementAt(i));
    }

    return listOf4Item.ToArray();
}

MyCollectionCell

public MyCollectionCell (IntPtr handle) : base (handle)
{

}

public void PopulateData(string title, string placeholderURL)
{
    //lblTitle.Text = title;
    placeholderImg.SetImage(url: new NSUrl(placeholderURL),
                            placeholder: UIImage.FromFile("ic_apptitle.png"));
}

Answer 1

你的问题在这里：

JSON.stringify(canvas)

要为您的单元格设置不同的尺寸，您可以添加此方法：

canvas.loadFromJSON(json)