Re: Auto layout semantics?
Re: Auto layout semantics?
- Subject: Re: Auto layout semantics?
- From: Izak van Langevelde <email@hidden>
- Date: Fri, 16 Aug 2013 21:36:23 +0200
On 16 aug. 2013, at 19:18, Kyle Sluder wrote:
> [bringing this back on-list]
>
> On Aug 16, 2013, at 1:10 PM, Izak van Langevelde <email@hidden> wrote:
>
>> Dear Kyle,
>>
>> On 16 aug. 2013, at 18:38, Kyle Sluder wrote:
>>
>> What I am looking for is the algorithm that determines a layout based on a set of constraints.
>
> As I mentioned, it converts all the constraints in your window into linear equations and feeds them to a constraint solver. This solver produces frames for all views in the window.
>
> As Ken Ferry described in his Auto Layout session at WWDC 2011, the specific solver used by Apple is based on the Cassowary constraint engine.
>
> So asking for the "algorithm" isn't really that helpful, because Auto Layout is not defined or implemented imperatively. There's an algorithm involved, but that algorithm is a general-purpose constraint solver that operates on linear equations. Strictly speaking it has nothing to do with views.
That is good enough for me, I'll take a look at it.
Thanks,
Izak
---
Grinnikend door het leven...
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