Swift压缩图片以及修改图片颜色

概述extension UIImage { func scaleToSize(size:CGSize) -> UIImage { UIGraphicsBeginImageContextWithOptions(size, false, 0) self.draw(in: CGRect(x: 0, y: 0, width: size.width, height: si

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!    }}

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