Comment puis-je colorer un UIImage dans Swift?

Question

J'ai une image appelée arrowWhite. Je veux colorer cette image en noir.

func attachDropDownArrow() -> NSMutableAttributedString {
        let image:UIImage = UIImage(named: "arrowWhite.png")!
        let attachment = NSTextAttachment()
        attachment.image = image
        attachment.bounds = CGRectMake(2.25, 2, attachment.image!.size.width - 2.25, attachment.image!.size.height - 2.25)
        let attachmentString = NSAttributedString(attachment: attachment)
        let myString = NSMutableAttributedString(string: NSString(format: "%@", self.privacyOptions[selectedPickerRow]) as String)
        myString.appendAttributedString(attachmentString)
        return myString
    }

Je veux obtenir cette image en blackColour.
tintColor ne fonctionne pas ...

Answer 1

Swift 4

extension UIImageView {
  func setImageColor(color: UIColor) {
    let templateImage = self.image?.withRenderingMode(UIImage.RenderingMode.alwaysTemplate)
    self.image = templateImage
    self.tintColor = color
  }
}

Appelle comme ça:

let imageView = UIImageView(image: UIImage(named: "your_image_name"))
imageView.setImageColor(color: UIColor.purple)

Alternativ Pour Swift 3 et 4

extension UIImage {

    func maskWithColor(color: UIColor) -> UIImage? {
        let maskImage = cgImage!

        let width = size.width
        let height = size.height
        let bounds = CGRect(x: 0, y: 0, width: width, height: height)

        let colorSpace = CGColorSpaceCreateDeviceRGB()
        let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedLast.rawValue)
        let context = CGContext(data: nil, width: Int(width), height: Int(height), bitsPerComponent: 8, bytesPerRow: 0, space: colorSpace, bitmapInfo: bitmapInfo.rawValue)!

        context.clip(to: bounds, mask: maskImage)
        context.setFillColor(color.cgColor)
        context.fill(bounds)

        if let cgImage = context.makeImage() {
            let coloredImage = UIImage(cgImage: cgImage)
            return coloredImage
        } else {
            return nil
        }
    }

}

Pour Swift 2.3

extension UIImage {
func maskWithColor(color: UIColor) -> UIImage? {

    let maskImage = self.CGImage
    let width = self.size.width
    let height = self.size.height
    let bounds = CGRectMake(0, 0, width, height)

    let colorSpace = CGColorSpaceCreateDeviceRGB()
    let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.PremultipliedLast.rawValue)
    let bitmapContext = CGBitmapContextCreate(nil, Int(width), Int(height), 8, 0, colorSpace, bitmapInfo.rawValue) //needs rawValue of bitmapInfo

    CGContextClipToMask(bitmapContext, bounds, maskImage)
    CGContextSetFillColorWithColor(bitmapContext, color.CGColor)
    CGContextFillRect(bitmapContext, bounds)

    //is it nil?
    if let cImage = CGBitmapContextCreateImage(bitmapContext) {
        let coloredImage = UIImage(CGImage: cImage)

        return coloredImage

    } else {
        return nil
    } 
 }
}

Appelle comme ça:

let image = UIImage(named: "your_image_name")
testImage.image =  image?.maskWithColor(color: UIColor.blue)

Answer 2

Il existe une méthode intégrée pour obtenir une UIImage automatiquement rendue en mode template . Ceci utilise la teinteCouleur d'une vue pour colorer l'image:

let templateImage = originalImage.imageWithRenderingMode(UIImageRenderingModeAlwaysTemplate)
myImageView.image = templateImage
myImageView.tintColor = UIColor.orangeColor()

Answer 3

Vous devez d’abord modifier la propriété de rendu de l’image en "Modèle d’image" dans le dossier .xcassets . Vous pouvez ensuite modifier la propriété de couleur de teinte de l’instance de votre UIImageView de la manière suivante: 

imageView.tintColor = UIColor.whiteColor()

 

Answer 4

Cette fonction utilise des graphiques de base pour y parvenir.

func overlayImage(color: UIColor) -> UIImage {
    UIGraphicsBeginImageContextWithOptions(self.size, false, UIScreen.main.scale)
    let context = UIGraphicsGetCurrentContext()

    color.setFill()

    context!.translateBy(x: 0, y: self.size.height)
    context!.scaleBy(x: 1.0, y: -1.0)

    context!.setBlendMode(CGBlendMode.colorBurn)
    let rect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height)
    context!.draw(self.cgImage!, in: rect)

    context!.setBlendMode(CGBlendMode.sourceIn)
    context!.addRect(rect)
    context!.drawPath(using: CGPathDrawingMode.fill)

    let coloredImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    return coloredImage
}

Answer 5

Je me suis retrouvé avec ceci parce que d'autres réponses perdent soit la résolution, soit fonctionnent avec UIImageView, pas UIImage, soit contiennent des actions inutiles:

Swift 3

extension UIImage {

    public func maskWithColor(color: UIColor) -> UIImage {

        UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
        let context = UIGraphicsGetCurrentContext()!

        let rect = CGRect(Origin: CGPoint.zero, size: size)

        color.setFill()
        self.draw(in: rect)

        context.setBlendMode(.sourceIn)
        context.fill(rect)

        let resultImage = UIGraphicsGetImageFromCurrentImageContext()!
        UIGraphicsEndImageContext()
        return resultImage
    }

}

Answer 6

Créez une extension sur UIImage:

/// UIImage Extensions
extension UIImage {
    func maskWithColor(color: UIColor) -> UIImage {

        var maskImage = self.CGImage
        let width = self.size.width
        let height = self.size.height
        let bounds = CGRectMake(0, 0, width, height)

        let colorSpace = CGColorSpaceCreateDeviceRGB()
        let bitmapInfo = CGBitmapInfo(CGImageAlphaInfo.PremultipliedLast.rawValue)
        let bitmapContext = CGBitmapContextCreate(nil, Int(width), Int(height), 8, 0, colorSpace, bitmapInfo)

        CGContextClipToMask(bitmapContext, bounds, maskImage)
        CGContextSetFillColorWithColor(bitmapContext, color.CGColor)
        CGContextFillRect(bitmapContext, bounds)

        let cImage = CGBitmapContextCreateImage(bitmapContext)
        let coloredImage = UIImage(CGImage: cImage)

        return coloredImage!
    }
}

Ensuite, vous pouvez l'utiliser comme ça:

image.maskWithColor(UIColor.redColor())

Answer 7

J'ai trouvé la solution de H R très utile, mais je l'ai légèrement adaptée pour Swift 3 

extension UIImage {

    func maskWithColor( color:UIColor) -> UIImage {

         UIGraphicsBeginImageContextWithOptions(self.size, false, UIScreen.main.scale)
         let context = UIGraphicsGetCurrentContext()!

         color.setFill()

         context.translateBy(x: 0, y: self.size.height)
         context.scaleBy(x: 1.0, y: -1.0)

         let rect = CGRect(x: 0.0, y: 0.0, width: self.size.width, height: self.size.height)
         context.draw(self.cgImage!, in: rect)

         context.setBlendMode(CGBlendMode.sourceIn)
         context.addRect(rect)
         context.drawPath(using: CGPathDrawingMode.fill)

         let coloredImage = UIGraphicsGetImageFromCurrentImageContext()
         UIGraphicsEndImageContext()

         return coloredImage!
    }
}

Cela prend en compte l’échelle et ne produit pas non plus d’image de résolution inférieure, contrairement à d’autres solutions. Utilisation:

image = image.maskWithColor(color: .green )

Answer 8

Le wrapper d’extension Swift 3 de @Nikolai Ruhe.

extension UIImageView {

    func maskWith(color: UIColor) {
        guard let tempImage = image?.withRenderingMode(.alwaysTemplate) else { return }
        image = tempImage
        tintColor = color
    }

}

Il peut également être utilisé pour UIButton, par exemple:

button.imageView?.maskWith(color: .blue)

Answer 9

Pour que Swift 4.2 change la couleur de UIImage à votre guise

extension UIImage {
    func imageWithColor(color: UIColor) -> UIImage {
        UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
        color.setFill()

        let context = UIGraphicsGetCurrentContext()
        context?.translateBy(x: 0, y: self.size.height)
        context?.scaleBy(x: 1.0, y: -1.0)
        context?.setBlendMode(CGBlendMode.normal)

        let rect = CGRect(Origin: .zero, size: CGSize(width: self.size.width, height: self.size.height))
        context?.clip(to: rect, mask: self.cgImage!)
        context?.fill(rect)

        let newImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        return newImage!
    }
}

Comment utiliser

self.imgVw.image = UIImage(named: "testImage")?.imageWithColor(UIColor.red)

Answer 10

Swift 4

 let image: UIImage? =  #imageLiteral(resourceName: "logo-1").withRenderingMode(.alwaysTemplate)
    topLogo.image = image
    topLogo.tintColor = UIColor.white

Answer 11

Version Swift 3 avec échelle et orientation de @kuzdu answer

extension UIImage {

    func mask(_ color: UIColor) -> UIImage? {
        let maskImage = cgImage!

        let width = (cgImage?.width)!
        let height = (cgImage?.height)!
        let bounds = CGRect(x: 0, y: 0, width: width, height: height)

        let colorSpace = CGColorSpaceCreateDeviceRGB()
        let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedLast.rawValue)
        let context = CGContext(data: nil, width: Int(width), height: Int(height), bitsPerComponent: 8, bytesPerRow: 0, space: colorSpace, bitmapInfo: bitmapInfo.rawValue)!

        context.clip(to: bounds, mask: maskImage)
        context.setFillColor(color.cgColor)
        context.fill(bounds)

        if let cgImage = context.makeImage() {
            let coloredImage = UIImage.init(cgImage: cgImage, scale: scale, orientation: imageOrientation)
            return coloredImage
        } else {
            return nil
        }
    }
}

Answer 12

Ajoutez cette extension dans votre code et changez la couleur de l'image dans le storyboard lui-même.

Swift 4 & 5:

extension UIImageView {
    @IBInspectable
    var changeColor: UIColor? {
        get {
            let color = UIColor(cgColor: layer.borderColor!);
            return color
        }
        set {
            let templateImage = self.image?.withRenderingMode(.alwaysTemplate)
            self.image = templateImage
            self.tintColor = newValue
        }
    }
}

---

Aperçu:

Answer 13

Swift 3

21 juin 2017

J'utilise CALayer pour masquer l'image donnée avec le canal alpha

import Foundation


extension UIImage {

    func maskWithColor(color: UIColor) -> UIImage? {

        let maskLayer = CALayer()
        maskLayer.bounds = CGRect(x: 0, y: 0, width: size.width, height: size.height)
        maskLayer.backgroundColor = color.cgColor
        maskLayer.doMask(by: self)
        let maskImage = maskLayer.toImage()
        return maskImage
    }

}


extension CALayer {
    func doMask(by imageMask: UIImage) {
        let maskLayer = CAShapeLayer()
        maskLayer.bounds = CGRect(x: 0, y: 0, width: imageMask.size.width, height: imageMask.size.height)
        bounds = maskLayer.bounds
        maskLayer.contents = imageMask.cgImage
        maskLayer.frame = CGRect(x: 0, y: 0, width: frame.size.width, height: frame.size.height)
        mask = maskLayer
    }

    func toImage() -> UIImage?
    {
        UIGraphicsBeginImageContextWithOptions(bounds.size,
                                               isOpaque,
                                               UIScreen.main.scale)
        guard let context = UIGraphicsGetCurrentContext() else {
            UIGraphicsEndImageContext()
            return nil
        }
        render(in: context)
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image
    }
}

Answer 14

Swift 4.

Utilisez cette extension pour créer une image colorée solide

extension UIImage {   

    public func coloredImage(color: UIColor) -> UIImage? {
        return coloredImage(color: color, size: CGSize(width: 1, height: 1))
    }

    public func coloredImage(color: UIColor, size: CGSize) -> UIImage? {

        UIGraphicsBeginImageContextWithOptions(size, false, 0)

        color.setFill()
        UIRectFill(CGRect(Origin: CGPoint(), size: size))

        guard let image = UIGraphicsGetImageFromCurrentImageContext() else { return nil }
        UIGraphicsEndImageContext()

        return image
    }
}

Answer 15

Voici la version de Swift 3 de la solution de HR.

func overlayImage(color: UIColor) -> UIImage? {
    UIGraphicsBeginImageContextWithOptions(self.size, false, UIScreen.main.scale)
    let context = UIGraphicsGetCurrentContext()

    color.setFill()

    context!.translateBy(x: 0, y: self.size.height)
    context!.scaleBy(x: 1.0, y: -1.0)

    context!.setBlendMode(CGBlendMode.colorBurn)
    let rect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height)
    context!.draw(self.cgImage!, in: rect)

    context!.setBlendMode(CGBlendMode.sourceIn)
    context!.addRect(rect)
    context!.drawPath(using: CGPathDrawingMode.fill)

    let coloredImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    return coloredImage
}