CATextLayer and CAConstraint
CATextLayer and CAConstraint
- Subject: CATextLayer and CAConstraint
- From: Aaron Tait <email@hidden>
- Date: Sun, 18 Nov 2007 03:00:09 -0500
I've been pulling my hair out trying to get a CATextLayer to work with
a couple of CAConstraints. The following is a method implemented in a
layer backed view and the following call is made in the view's
awakeFromNib:
self.layer.layoutManager = [CAConstraintLayoutManager layoutManager];
The method is as follows:
-(void)addFileNameLayer:(NSString *)fileName
{
CATextLayer * fileNameLayer = [CATextLayer layer];
fileNameLayer.string = fileName;
fileNameLayer.name = @"fileNameLayer";
fileNameLayer.fontSize = 14.0;
fileNameLayer.alignmentMode = kCAAlignmentCenter;
fileNameLayer.wrapped = YES;
fileNameLayer.anchorPoint = CGPointMake(0.5, 0.5);
fileNameLayer.bounds = CGRectMake(0, 0, 320, 50);
[fileNameLayer addConstraint:[CAConstraint
constraintWithAttribute:kCAConstraintMidX relativeTo:@"superlayer"
attribute:kCAConstraintMidX]];
[fileNameLayer addConstraint:[CAConstraint
constraintWithAttribute:kCAConstraintMidY relativeTo:@"superlayer"
attribute:kCAConstraintMidY offset:-100]];
[self.layer addSublayer:fileNameLayer];
}
When the code executes, it displays nothing. I also add another plain
old CALayer before I call this method with similar constraints and it
works out fine. Anyone help would be appreciated.
-Aaron
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