我有一个名为theImageView的UIImageView, UIImage是单色的(透明背景),就像下面左边的黑色心形。我如何在iOS 7或更高的系统中,根据iOS 7+导航栏图标中使用的色调方法,以编程方式更改此图像的色调颜色?
这个方法也适用于WatchKit的Apple Watch应用程序吗?
我有一个名为theImageView的UIImageView, UIImage是单色的(透明背景),就像下面左边的黑色心形。我如何在iOS 7或更高的系统中,根据iOS 7+导航栏图标中使用的色调方法,以编程方式更改此图像的色调颜色?
这个方法也适用于WatchKit的Apple Watch应用程序吗?
当前回答
与迅速
let commentImageView = UIImageView(frame: CGRectMake(100, 100, 100, 100))
commentImageView.image = UIImage(named: "myimage.png")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate)
commentImageView.tintColor = UIColor.blackColor()
addSubview(commentImageView)
其他回答
斯威夫特5
重绘图像的背景和填充颜色
extension UIImage {
func withBackground(color: UIColor, fill fillColor: UIColor) -> UIImage {
UIGraphicsBeginImageContextWithOptions(size, true, scale)
guard let ctx = UIGraphicsGetCurrentContext(), let image = cgImage else { return self }
defer { UIGraphicsEndImageContext() }
ctx.concatenate(CGAffineTransform(a: 1, b: 0, c: 0, d: -1, tx: 0, ty: size.height))
let rect = CGRect(origin: .zero, size: size)
// draw background
ctx.setFillColor(color.cgColor)
ctx.fill(rect)
// draw image with fill color
ctx.clip(to: rect, mask: image)
ctx.setFillColor(fillColor.cgColor)
ctx.fill(rect)
return UIGraphicsGetImageFromCurrentImageContext() ?? self
}
}
Swift 3版本的扩展答案从模糊
func imageWithColor(color: UIColor) -> UIImage {
UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
color.setFill()
let context = UIGraphicsGetCurrentContext()! as CGContext
context.translateBy(x: 0, y: self.size.height)
context.scaleBy(x: 1.0, y: -1.0);
context.setBlendMode(.normal)
let rect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height) as CGRect
context.clip(to: rect, mask: self.cgImage!)
context.fill(rect)
let newImage = UIGraphicsGetImageFromCurrentImageContext()! as UIImage
UIGraphicsEndImageContext()
return newImage
}
与迅速
let commentImageView = UIImageView(frame: CGRectMake(100, 100, 100, 100))
commentImageView.image = UIImage(named: "myimage.png")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate)
commentImageView.tintColor = UIColor.blackColor()
addSubview(commentImageView)
自iOS 13以来,UIImage有一个原生方法
let image = yourImage.withTintColor(.systemRed)
另外,对于以上的答案,在iOS 13及以后有一个干净的方法
let image = UIImage(named: "imageName")?.withTintColor(.white, renderingMode: .alwaysTemplate)