Change SVG colour using SvgKit in iOS Swift

Question

I am using SVGKit library to render svg into image view. Svg is rendering perfectly but the issue is I am unable to fill the SVG colour. I found few examples in Objective C those are not helpful for me. Here I am using Swift5. Please find the attached Controller code. Thanks in advance.

Code:

let namSvgImgVar: SVGKImage = SVGKImage(named: "camera")
let namImjVar: UIImage = namSvgImgVar.uiImage
imageView.image = namImjVar

Answer 1

I have created an extension for the same:

extension SVGKImage {

    // MARK:- Private Method(s)
    private func fillColorForSubLayer(layer: CALayer, color: UIColor, opacity: Float) {
        if layer is CAShapeLayer {
            let shapeLayer = layer as! CAShapeLayer
            shapeLayer.fillColor = color.cgColor
            shapeLayer.opacity = opacity
        }

        if let sublayers = layer.sublayers {
            for subLayer in sublayers {
                fillColorForSubLayer(layer: subLayer, color: color, opacity: opacity)
            }
        }
    }

    private func fillColorForOutter(layer: CALayer, color: UIColor, opacity: Float) {
        if let shapeLayer = layer.sublayers?.first as? CAShapeLayer {
            shapeLayer.fillColor = color.cgColor
            shapeLayer.opacity = opacity
        }
    }

    // MARK:- Public Method(s)
    func fillColor(color: UIColor, opacity: Float) {
        if let layer = caLayerTree {
            fillColorForSubLayer(layer: layer, color: color, opacity: opacity)
        }
    }

    func fillOutterLayerColor(color: UIColor, opacity: Float) {
        if let layer = caLayerTree {
            fillColorForOutter(layer: layer, color: color, opacity: opacity)
        }
    }
}

If your SVG image has only one layer to color use fillColor, or fillOutterLayerColor if there are multiple, you can modify it based on your need. This is how I use it:

static func getImage(imageName: String, fontSize size: CGSize, fillColor color: UIColor?, opacity: Float = 1.0) -> UIImage? {
    let svgImage: SVGKImage = SVGKImage(named: imageName)
    svgImage.size = size
    if let colorToFill = color {
       svgImage.fillColor(color: colorToFill, opacity: opacity)
    }

   return svgImage.uiImage
}