Removing all CALayer's sublayers

Question

I have trouble with deleting all of layer\'s sublayers. I currently do this manually, but that brings unnecessary clutter. I found many topics about this in google, but no a

Answer 1

I had to do this in Xamarin/C#. I had a UITableViewCell with some CAShapeLayers for borders. All of the above options (including copying the Array and then removing layers caused a crash). The approach that worked for me:

When adding the CALayer, I gave it a name:

    var border = new CALayer();
    border.BackgroundColor = color.CGColor;
    border.Frame = new  CGRect(x, y, width, height);
    border.Name = "borderLayerName";
    Layer.AddSublayer(border);

In PrepareForReuse on the UITableViewCell, I created a copy of the SubLayers property and removed anything that matched the name I assigned earlier:

    CALayer[] copy = new CALayer[Layer.Sublayers.Length];
    Layer.Sublayers.CopyTo(copy, 0);
    copy.FirstOrDefault(l => l.Name == "borderLayerName")?.RemoveFromSuperLayer();

No crashes.

Hope this helps!