CALAYER应用背景颜色和图案图像

Question

I am having fun with Core Animation stuffs. I needed to apply a pattern image to a CALAyer. That part work perfectly with something like that:

color = UIColor(patternImage: UIImage(named: "myPatternImage")! 
shapeLayer.fillColor = color.CGColor;

But now I need to apply a background color behind the pattern. my Patter image is a png (with alpha component). So I want to apply a simple Color to the shape and after apply the pattern Image. Is there a way to do that on the fly?

Answer 1

Just add another sublayer with background color and add it before your pattern background layer:

UIColor *backgroundColor = [UIColor redColor];
CALayer *solidBackgroundColorLayer = [[CALayer alloc] init];
solidBackgroundColorLayer.backgroundColor = backgroundColor.CGColor;
[[self layer] addSublayer:solidBackgroundColorLayer];
UIColor *color = [UIColor colorWithPatternImage:[UIImage imageNamed:@"MyPattern.png"]];
backgroundLayer = [[CALayer alloc] init];
[backgroundLayer setBackgroundColor:[color CGColor]];
[[self layer] addSublayer:backgroundLayer];