在swift3中不使用Uiimageview更改UIImage颜色

2 回答

• 0

  tintColor 不仅是 UIImageView 的属性，它是 UIView 的属性，只要您的图像在UIView中，就可以使用 UIView.tintColor .

  回复于 2024-04-20T19:53:34+08:00
• 0

  谢谢大家的答案，但我得到了解决方案 .

  func changePatternImageColor() {
      patternImage = UIImage(named: "pattern_star.png")!  //make sure to reinitialize the original image here every time you change the color
      UIGraphicsBeginImageContext(patternImage.size)
      let context = UIGraphicsGetCurrentContext()
      let color = UIColor(red: self.red, green: self.green, blue: self.blue, alpha: self.opacity)
      color.setFill()
      context?.translateBy(x: 0, y: patternImage.size.height)
      context?.scaleBy(x: 1.0, y: -1.0)
      //set the blend mode to color burn, and the original image
      context?.setBlendMode(CGBlendMode.exclusion)  //this does the magic.
      let rect = CGRect(x: 0, y: 0, width: patternImage.size.height, height: patternImage.size.height)
      context?.draw(patternImage.cgImage!, in: rect)
      //set the mask that matches the shape of the image, then draw color burn a colored rectangle
      context?.clip(to: rect, mask: patternImage.cgImage!)
      context?.addRect(rect)
      context?.drawPath(using: CGPathDrawingMode.fill)
      patternImage = UIGraphicsGetImageFromCurrentImageContext()!
      image_ref = patternImage.cgImage
      UIGraphicsEndImageContext()
  }
  

  patternImage是资产中添加的图像 . 附：在资产 SHOULD 中添加的patternImage为黑色

  回复于 2024-04-20T19:53:34+08:00