如何将UIView添加为UICollectionViewController的标题视图

Question

我有一个UICollectionViewController，我试图将UIView添加为集合视图的标题视图。我目前的尝试是在经过大量时间跟踪大量指南后没有显示UIView。我希望有人能指出我正确的方向。

我目前的做法：

Set height of supplemental view and register

ViewDidLoad(){
   CollectionView.RegisterClassForSupplementaryView(typeof(CollectionHeader), UICollectionElementKindSection.Header, "HeaderView");
   UICollectionViewFlowLayout layout = new UICollectionViewFlowLayout();
   layout.HeaderReferenceSize = setHeader(this).Frame.Size; //setHeader returns a UIView
   CollectionView.SetCollectionViewLayout(layout, true);
}

Gets the supplemental view

public override UICollectionReusableView GetViewForSupplementaryElement(UICollectionView collectionView, NSString elementKind, NSIndexPath indexPath)
{
    CollectionHeader headerView = (CollectionHeader)collectionView.DequeueReusableSupplementaryView(UICollectionElementKindSection.Header, "HeaderView", indexPath);
    headerView.owner = this;
    headerView.view = setHeader(this);//setHeader returns a UIView
    return headerView;
}

Create my view via a class (not really sure how/why to do this)

public class CollectionHeader : UICollectionReusableView {
    public UIView view { 
        get { return view; }
        set { view = value; SetNeedsDisplay();}
    }
    public PhotographController owner;
    [Export("initWithFrame:")]
    public CollectionHeader(System.Drawing.RectangleF frame) :base(frame) {
        view = new UIView(setHeader(owner).Frame);
        AddSubview(view);
    }
}

感谢您的帮助！