How to set texture to CALayer in ios? - ios

Question

How texture(like below) image can be applied to calayer with opacity levels like combining texture and calayer image?
Sample texture

Answer 1

You can use this
UIImage *yourImage = [UIImage imageNamed:#"yourTextureImage"];
self.yourView.layer.contents = (__bridge id) yourImage.CGImage;
EDIT Try this add sublayer on existing layer.It will give you idea how to do that.
//It will draw some circle
int radius = 30.0;
UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, 20.0, 20.0) cornerRadius:0];
UIBezierPath *circlePath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, 2.0*radius, 2.0*radius) cornerRadius:radius];
[path appendPath:circlePath];
[path setUsesEvenOddFillRule:YES];
CAShapeLayer *fillLayer = [CAShapeLayer layer];
fillLayer.path = path.CGPath;
fillLayer.fillRule = kCAFillRuleEvenOdd;
fillLayer.fillColor = [UIColor blackColor].CGColor;
fillLayer.opacity = 0.7;
[self.view.layer addSublayer:fillLayer];
You can also try setting mask
[self.view.layer setMask:fillLayer];

Answer 2

I think, if I am not mistaken, you need to use CALayer's mask property to achieve the required result.
Please try the following
//create mask layer
CALayer *maskLayer = [CALayer layer];
maskLayer.frame = self.imageView.bounds;
UIImage *maskImage = [UIImage imageNamed:#"Your image"];
maskLayer.contents = (__bridge id)maskImage.CGImage;
//apply mask to image layer
self.imageView.layer.mask = maskLayer;