@available(iOS 5.0, *)
open func resizableImage(withCapInsets capInsets: UIEdgeInsets) -> UIImage@available(iOS 6.0, *)
open func resizableImage(withCapInsets capInsets: UIEdgeInsets, resizingMode: UIImage.ResizingMode) -> UIImage

 func  ninePatchImage(_ scale: Int = 3) -> UIImage{guard let imageRef = self.cgImage else{return self}guard let rgbaImage :[[CGFloat]] = getRGBA() else{return self}let scale:CGFloat = CGFloat(scale)//最上边一行的各像素点数组var topBarRgba:[[CGFloat]] = []for i in 1..<imageRef.width - 1 {topBarRgba.append(rgbaImage[i])}//最左边一排像素点数组var leftBarRgba = [[CGFloat]]()for i in 0..<rgbaImage.count {if i % imageRef.width == 0{leftBarRgba.append(rgbaImage[i])}}leftBarRgba.removeFirst()leftBarRgba.removeLast()guard let edge = stretchEdge(topBarRgba: topBarRgba, leftBarRgba: leftBarRgba) else {return self}if let  cgImage = self.cgImage?.cropping(to: CGRect(x: 1, y: 1, width: self.size.width - 2, height: self.size.height - 2)){var cropImage = UIImage.init(cgImage: cgImage, scale: CGFloat(scale), orientation: .up)cropImage = cropImage.resizableImage(withCapInsets: UIEdgeInsets(top: edge.top/scale, left: edge.left/scale, bottom: edge.bottom/scale, right: edge.right/scale),resizingMode: .stretch)return cropImage}return self}

private func stretchEdge(topBarRgba:[[CGFloat]],leftBarRgba:[[CGFloat]]) -> UIEdgeInsets?{var left = -1for i in 0..<topBarRgba.count {if topBarRgba[i][3] == 1 {left = ibreak}}if left == -1{return nil}var right = -1for i in (0..<topBarRgba.count).reversed() {if topBarRgba[i][3] == 1 {right = ibreak}}if right == -1{return nil}var top = -1for i in (0..<leftBarRgba.count) {if leftBarRgba[i][3] == 1 {top = ibreak}}if top == -1{return nil}var bottom = -1for i in (0..<leftBarRgba.count).reversed() {if leftBarRgba[i][3] == 1 {bottom = ibreak}}if bottom == -1{return nil}bottom = leftBarRgba.count - 1 - bottomright = topBarRgba.count - 1 - rightreturn UIEdgeInsets(top: CGFloat(top), left: CGFloat(left), bottom: CGFloat(bottom), right: CGFloat(right))}