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Swift压缩图片以及修改图片颜色,
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extension UIImage {
func scaleToSize(size:CGSize) -> UIImage {
UIGraphicsBeginImageContextWithOptions(size,false,0)
self.draw(in: CGRect(x: 0,y: 0,width: size.width,height: size.height))
let img = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return img!
}
func changeColor(color:UIColor) -> UIImage {
UIGraphicsBeginImageContextWithOptions(self.size,self.scale)
let context = UIGraphicsGetCurrentContext()
context?.translateBy(x: 0,y: self.size.height)
context?.scaleBy(x: 1.0,y: -1.0)//kCGBlendModeNormal
context?.setBlendMode(.normal)
let rect = CGRect(x: 0,width: self.size.width,height: self.size.height)
context?.clip(to: rect,mask: self.cgImage!)
color.setFill()
context?.fill(rect)
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return newImage!
}
}