Multi tool use

How to add background colour in existing image using Swift?

I am trying to add background colour to existing image but it is not working.

Here below is my code:-

extension UIImage {
func imageWithColor(tintColor: UIColor) -> UIImage {

let rect = CGRect(x: 0, y: 0, width: 1, height: 1)
UIGraphicsBeginImageContextWithOptions(rect.size, false, 0)
tintColor.setFill()
UIRectFill(rect)
let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()

//self.type(of: init)(ciImage: CIImage(image: image)!)
return image
}
}

extension UIImage {

/**
Returns an UIImage with a specified background color.
- parameter color: The color of the background
*/
convenience init(withBackground color: UIColor) {

let rect: CGRect = CGRect(x: 0, y: 0, width: 1, height: 1)
UIGraphicsBeginImageContext(rect.size);
let context:CGContext = UIGraphicsGetCurrentContext()!;
context.setFillColor(color.cgColor);
context.fill(rect)

let image:UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()

self.init(ciImage: CIImage(image: image)!)

}
}.


I am very new in Graphics and don't know how I can put background colour to an image.

In this white colour image is there and orange colour is background colour.

1 Answer
1

You should create a new image with background color and existing image.
try this.

func getImage(image: UIImage, backgroundColor: UIColor)->UIImage?{

UIGraphicsBeginImageContextWithOptions(image.size, false, image.scale)
backgroundColor.setFill()
//UIRectFill(CGRect(origin: .zero, size: image.size))
let rect = CGRect(origin: .zero, size: image.size)
let path = UIBezierPath(arcCenter: CGPoint(x:rect.midX, y:rect.midY), radius: rect.midX, startAngle: 0, endAngle: 6.28319, clockwise: true)
path.fill()
image.draw(at: .zero)
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return newImage
}


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