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【Swift】UIImageの色を変える(塗りつぶす)

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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。

ryokosuge
金髪iOS エンジニア なんか色々やってます
https://ryokosuge.github.io/
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