[英]How to set tint color of an Image
let tintedImage = #imageLiteral(resourceName: "user")
pictureImageView?.image = mainCircleImage.overlayed(with: tintedImage,color: UIColor.orange)
extension UIImage {
func overlayed(with overlay: UIImage,color:UIColor) -> UIImage? {
defer {
UIGraphicsEndImageContext()
}
UIGraphicsBeginImageContextWithOptions(size, false, scale)
self.draw(in: CGRect(origin: CGPoint.zero, size: size))
let tintedOverlay = overlay.tintedImageWithColor(color: color)
tintedOverlay.draw(in: CGRect(origin: CGPoint.zero, size: size))
if let image = UIGraphicsGetImageFromCurrentImageContext() {
return image
}
return nil
}
func tint(color: UIColor, blendMode: CGBlendMode) -> UIImage
{
let drawRect = CGRect(x: 0.0, y: 0.0, width: size.width, height: size.height)
UIGraphicsBeginImageContextWithOptions(size, false, scale)
let context = UIGraphicsGetCurrentContext()
context!.scaleBy(x: 1.0, y: -1.0)
context!.translateBy(x: 0.0, y: -self.size.height)
context!.clip(to: drawRect, mask: cgImage!)
color.setFill()
UIRectFill(drawRect)
draw(in: drawRect, blendMode: blendMode, alpha: 1.0)
let tintedImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return tintedImage!
}
func tintedImageWithColor(color: UIColor) -> UIImage
{
return self.tint(color: color, blendMode: CGBlendMode.multiply)
}
}
我已根據可能的答案更新了我的問題 這是我更改圖標顏色的代碼。 出於某種原因,當我更改色調顏色時,我的用戶圖標沒有完全填充其顏色。
我在UIImage
的擴展中添加了另外 2 個方法來為圖像着色,並在overlayed
方法中添加了一些更改
extension UIImage {
func overlayed(with overlay: UIImage,color:UIColor) -> UIImage? {
defer {
UIGraphicsEndImageContext()
}
UIGraphicsBeginImageContextWithOptions(size, false, scale)
self.draw(in: CGRect(origin: CGPoint.zero, size: size))
let tintedOverlay = overlay.tinted(color: color)
tintedOverlay.draw(in: CGRect(origin: CGPoint.zero, size: size), blendMode: .multiply, alpha: 1.0)
if let image = UIGraphicsGetImageFromCurrentImageContext() {
return image
}
return nil
}
func tinted(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!
}
}
Tinted 方法的內容來自這個問題How can I color a UIImage in Swift? @HR 提供的答案
用它
let mainCircleImage = UIImage(named: "actions_menu_edit")?
let tintedImage = UIImage(named: "actions_menu_add")
pictureImageView?.image = mainCircleImage?.overlayed(with: tintedImage!,color: UIColor.red)
上次更新的結果
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