【Swift】UIImageの色を変える（塗りつぶす）

こんなシンプルな内容

2018/01/18 更新

Swift4

UIImageExtension.swift

extension UIImage {
    func tint(color: UIColor) -> UIImage {
        UIGraphicsBeginImageContextWithOptions(size, false, 0)
        color.setFill()
        let drawRect = CGRect(x: 0, y: 0, width: size.width, height: size.height)
        UIRectFill(drawRect)
        draw(in: drawRect, blendMode: .destinationIn, alpha: 1)
        let tintedImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return tintedImage
    }
}

Swift2

UIImageExtension.swift

extension UIImage {
	func tint(color: UIColor) -> UIImage {
		UIGraphicsBeginImageContextWithOptions(size, false, 0)
		color.setFill()
		let drawRect = CGRectMake(0, 0, size.width, size.height)
		UIRectFill(drawRect)
		drawInRect(drawRect, blendMode: kCGBlendModeDestinationIn, alpha: 1)
		let tintedImage = UIGraphicsGetImageFromCurrentImageContext()
		UIGraphicsEndImageContext()
		return tintedImage
	}
}

同じ画像の色違いを表示したい時には使える関数だと思います。