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Re: CALayer doesn't resize immediately

Subject: Re: CALayer doesn't resize immediately
From: Axel Péju <email@hidden>
Date: Wed, 7 Nov 2007 21:52:18 +0100
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Hi again,

Using autoresizingMaks works far better. But after some hours of work, I came with the conclusion that CAConstraintLayoutManager performances are not what I expect them to be. Even with the Core Animation provided - CovertFlow - example, I clearly see the layers translate when I resize the view. The problem is that I really need to use CAConstrainLayoutManagers,as my application does more than the project I included in the first mail.

Maybe some of you could confirm this issue, it might be a PPC-only issue. I hope there is a fix in 10.5.1 if this is a bug...

Axel

Le 7 nov. 07 à 11:08, Thomas Schlömer a écrit :

Hi,
my first guess:
Instead of configuring the constraints like this
[sublayer addConstraint:[CAConstraint constraintWithAttribute:kCAConstraintMinX relativeTo:@"superlayer" attribute:kCAConstraintMinX]]; [sublayer addConstraint:[CAConstraint constraintWithAttribute:kCAConstraintWidth relativeTo:@"superlayer" attribute:kCAConstraintWidth]]; [sublayer addConstraint:[CAConstraint constraintWithAttribute:kCAConstraintMidY relativeTo:@"superlayer" attribute:kCAConstraintMidY]]; [sublayer addConstraint:[CAConstraint constraintWithAttribute:kCAConstraintHeight relativeTo:@"superlayer" attribute:kCAConstraintHeight]];
it should be sufficient to write
[sublayer addConstraint:[CAConstraint constraintWithAttribute:kCAConstraintWidth relativeTo:@"superlayer" attribute:kCAConstraintWidth]];

[sublayer addConstraint:[CAConstraint constraintWithAttribute:kCAConstraintHeight relativeTo:@"superlayer" attribute:kCAConstraintHeight]];}
, i.e., just constraining the width and height in relation to the superlayer.
However, a more elegant solution should be to simply write:
sublayer.autoresizingMask = kCALayerWidthSizable | kCALayerHeightSizable; sublayer.layoutManager = [CAConstraintLayoutManager layoutManager];
All this without actually testing it.
Thomas S.
--
Oldenburg University - Department of Computer Science
Media Informatics and Multimedia-Systems
Phone: +49 441 9722-175  -  Fax: +49 441 9722-102
Escherweg 2  -  D-26121 Oldenburg


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References:
	>CALayer doesn't resize immediately (From: Axel Péju <email@hidden>)
	>Re: CALayer doesn't resize immediately (From: Thomas Schlömer <email@hidden>)

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