简单的方法：

Question

我有一张名为Single的图片。我想把这张图片变成黑色。

arrowWhite

我希望在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 }中获得此图片 blackColour无效......

Answer 1

Swift 4和5

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

这样打电话：

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

可选择性 适用于Swift 3,4或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
        }
    }

}

适用于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
    } 
 }
}

这样打电话：

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

Answer 2

有一种内置方法可以获取UIImage，并在template mode中自动呈现。这使用视图的tintColor为图像着色：

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

Answer 3

首先，您必须将图像的渲染属性更改为.xcassets文件夹中的“模板图像”。然后，您可以像这样更改UIImageView实例的tint颜色属性：

imageView.tintColor = UIColor.whiteColor()

Answer 4

此功能使用核心图形来实现此目的。

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

我最终得到了这个，因为其他答案要么失去解决方案，要么使用UIImageView，而不是使用UIImage，或者包含不必要的操作：

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

在UIImage上创建扩展名：

/// 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!
    }
}

然后你可以这样使用它：

image.maskWithColor(UIColor.redColor())

Answer 7

我发现H R的解决方案最有帮助，但稍微适应了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!
    }
}

这考虑了比例并且也不像其他一些解决方案那样产生较低的res图像。用法：

image = image.maskWithColor(color: .green )

Answer 8

来自@Nikolai Ruhe的Swift 3扩展包装回答。

extension UIImageView {

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

}

它也可以用于UIButton，例如：

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

Answer 9

让Swift 4.2可以根据需要更改UIImage颜色

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!
    }
}

使用方法

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

Answer 10

对于iOS13 +，有withTintColor(__:)和withTintColor(_:renderingMode:)方法。

用法示例：

let newImage = oldImage.withTintColor(.red)

或

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

Answer 11

Swift 4

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

Answer 12

简单的方法：

yourIcon.image = yourIcon.image?.withRenderingMode(.alwaysTemplate)
yourIcon.tintColor = .someColor

顺便说一句，在 Android 上更有趣！

yourIcon.setColorFilter(getColor(R.color.someColor), PorterDuff.Mode.MULTIPLY);

Answer 13

在代码中添加此扩展名，并在情节提要中更改图像颜色。

快速4和5：

 onChanged: (strNum) => trackerBloc.setsSink((int.parse(strNum))),

预览：

Answer 14

带有比例的Swift 3版本和来自@kuzdu的方向回答

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 15

Swift 4。

使用此扩展程序创建纯色图片

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 16

Swift 3

2017年6月21日

我使用CALayer用Alpha通道

屏蔽给定的图像

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 17

在iOS 13之后，您可以使用类似的东西

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

Answer 18

添加扩展功能：

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

使用方式：

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

Answer 19

这是H R解决方案的第3版。

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 20

我修改了此处的扩展程序：Github Gist，我已在UIImage扩展程序的上下文中测试Swift 3。

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
}

Answer 21

由于我发现Darko的回答非常有助于为mapView注释着色自定义引脚，但是必须为Swift 3进行一些转换，我想我会分享更新的代码以及我对他的回答的建议：

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!
    }
}

如何在Swift中为UIImage着色？

21 个答案:

简单的方法：

顺便说一句，在 Android 上更有趣！

Swift 3

2017年6月21日