> Op 21 mrt. 2014 om 17:28 heeft David Duncan <david.dun...@apple.com> het 
> volgende geschreven:
> 
> 
>> On Mar 21, 2014, at 3:53 AM, Remco Poelstra <re...@beryllium.net> wrote:
>> 
>> Hi,
>> 
>> I'm working on an iOS app which needs to draw paths. Drawing is performed in 
>> layers, each layer having its own color. Some paths add (opaque) content, 
>> while some paths remove content (i.e. draw in a clear color). Content 
>> removal should only happen on a per layer basis. This model fits exactly 
>> with CALayer, with a CALayer for each drawing layer.
>> The drawing layers can contain up to 30000 paths.
>> Since I want to be able to zoom in, I'm using CATiledLayer. Unfortunately 
>> CATiledLayer does not allow sub layers.
> 
> Thats news. What makes you believe this?

The internet did. But it is not true, is it? At least apple docs don't say it 
is not possible. Then I wonder will it solve the problem of trying to draw 
everything for each tile? Seems I've new options to try tomorrow :)

Regards,

Remco Poelstra 
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