[ios] Swift에서 UIImage에 색상을 지정하려면 어떻게해야합니까?

Question 1

라는 이미지가 arrowWhite있습니다. 이 이미지를 검은 색으로 색칠하고 싶습니다.

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
}

이 이미지를 blackColour.
tintColor작동하지 않는다…

Question 2

Swift 4 및 5

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

다음과 같이 전화하십시오.

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

Swift 3, 4 또는 5 용 Alternativ

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
        }
    }

}

Swift 2.3의 경우

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
    }
 }
}

다음과 같이 전화하십시오.

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

Question 3

템플릿 모드UIImage 에서 자동으로 렌더링되는를 가져 오는 기본 제공 메서드가 있습니다 . 뷰의 tintColor를 사용하여 이미지에 색상을 지정합니다.

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

Question 4

먼저 .xcassets 폴더에서 이미지의 렌더링 속성을 “Template Image”로 변경해야합니다. 그런 다음 UIImageView 인스턴스의 색조 색상 속성을 다음과 같이 변경할 수 있습니다.

imageView.tintColor = UIColor.whiteColor()

Question 5

다른 답변이 해상도를 잃거나 UIImage가 아닌 UIImageView로 작업하거나 불필요한 작업을 포함하기 때문에 나는 이것으로 끝났습니다.

스위프트 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
    }

}

Question 6

이 기능은이를 위해 핵심 그래픽을 사용합니다.

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
}

Question 7

빠른 4.2가 원하는대로 UIImage 색상을 변경하려면 (단색)

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!
    }
}

사용하는 방법

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

Question 8

UIImage에 확장을 만듭니다.

/// 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!
    }
}

그런 다음 다음과 같이 사용할 수 있습니다.

image.maskWithColor(UIColor.redColor())