Comment puis-je colorer une UIImage dans Swift?

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 faire entrer cette image blackColour.
tintColorne fonctionne pas...

Swift 4 et 5

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

Appelez comme ceci:

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

Alternatif pour Swift 3, 4 ou 5

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
    } 
 }
}

Appelez comme ceci:

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

Il existe une méthode intégrée pour obtenir un UIImagerendu automatique en mode modèle . Cela utilise tintColor d'une vue pour colorer l'image:

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

Vous devez d'abord changer la propriété de rendu de l'image en "Template Image" dans le dossier .xcassets. Vous pouvez ensuite simplement modifier la propriété de couleur de teinte de l'instance de votre UIImageView comme suit:

imageView.tintColor = UIColor.whiteColor()

J'ai fini avec cela parce que d'autres réponses perdent la résolution ou fonctionnent avec UIImageView, pas UIImage, ou 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
    }

}

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
}

Pour swift 4.2, changez la couleur UIImage comme vous le souhaitez (couleur unie)

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)

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())

J'ai trouvé la solution HR la plus 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 une image de résolution inférieure comme certaines autres solutions. Utilisation:

image = image.maskWithColor(color: .green )

L'encapsuleur d'extension Swift 3 de @Nikolai Ruhe répond.

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)

Swift 4

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

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

Swift 4 et 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 du storyboard:

Pour iOS13 +, il existe withTintColor (__ :) et withTintColor (_: renderingMode :) .

Exemple d'utilisation:

let newImage = oldImage.withTintColor(.red)

ou

let newImage = oldImage.withTintColor(.red, renderingMode: .alwaysTemplate)

Swift 3

21 juin 2017

J'utilise CALayer pour masquer l'image donnée avec Alpha Channel

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
    }
}

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
        }
    }
}

Swift 4.

Utilisez cette extension pour créer un image de couleur unie

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
    }
}

Après iOS 13, vous pouvez l'utiliser quelque chose comme ça

arrowWhiteImage.withTintColor(.black, renderingMode: .alwaysTemplate)

Ajouter une fonction d'extension:

extension UIImageView {
    func setImage(named: String, color: UIColor) {
        self.image = #imageLiteral(resourceName: named).withRenderingMode(.alwaysTemplate)
        self.tintColor = color
    }
}

Utilisez comme:

anyImageView.setImage(named: "image_name", color: .red)

Voici la version Swift 3 de la solution 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
}

Comme j'ai trouvé la réponse de Darko très utile pour coloriser les épingles personnalisées pour les annotations mapView, mais que j'ai dû faire quelques conversions pour Swift 3, j'ai pensé partager le code mis à jour avec ma recommandation pour sa réponse:

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

        var maskImage = self.CGImage
        let width = self.size.width
        let height = self.size.height
        let bounds = CGRect(x: 0, y: 0, width: width, height: height)

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

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

        let cImage = bitmapContext!.makeImage()
        let coloredImage = UIImage(CGImage: cImage)

        return coloredImage!
    }
}

J'ai modifié l'extension trouvée ici: Github Gist , pour Swift 3laquelle j'ai testé dans le cadre d'une extension pour UIImage.

func tint(with color: UIColor) -> UIImage 
{
   UIGraphicsBeginImageContext(self.size)
   guard let context = UIGraphicsGetCurrentContext() else { return self }

   // flip the image
   context.scaleBy(x: 1.0, y: -1.0)
   context.translateBy(x: 0.0, y: -self.size.height)

   // multiply blend mode
   context.setBlendMode(.multiply)

   let rect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height)
   context.clip(to: rect, mask: self.cgImage!)
   color.setFill()
   context.fill(rect)

   // create UIImage
   guard let newImage = UIGraphicsGetImageFromCurrentImageContext() else { return self }
   UIGraphicsEndImageContext()

   return newImage
}