How can I color a UIImage in Swift?

Question

I have an image called arrowWhite. I want to colour this image to black.

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 } 

I want to get this image in blackColour.
tintColor is not working...

Answer 1

Swift 4 and 5

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

Call like this:

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

Alternativ For Swift 3, 4 or 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         }     }  } 

For 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     }   } } 

Call like this:

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