///--生成二维码
/// CIFilter
let filter = CIFilter.init(name: "CIQRCodeGenerator")
filter?.setDefaults()
/// Add Data
//链接转换
let data = "https://XXXXX.com".data(using: .utf8)
filter?.setValue(data, forKeyPath: "inputMessage")
/// Out Put
let outputImage = filter?.outputImage
/// Show QRCode
shareUI.logoImage.image = createUIImageFromCIImage(image: outputImage!, size: 50)
// 高清处理 -- 生成二维码
static func createUIImageFromCIImage(image: CIImage, size: CGFloat) -> UIImage {
let extent = image.extent.integral
let scale = min(size / extent.width, size / extent.height)
/// Create bitmap
let width: size_t = size_t(extent.width * scale)
let height: size_t = size_t(extent.height * scale)
let cs: CGColorSpace = CGColorSpaceCreateDeviceGray()
let bitmap: CGContext = CGContext(data: nil, width: width, height: height, bitsPerComponent: 8, bytesPerRow: 0, space: cs, bitmapInfo: 1)!
///
let context = CIContext.init()
let bitmapImage = context.createCGImage(image, from: extent)
bitmap.interpolationQuality = .none
bitmap.scaleBy(x: scale, y: scale)
bitmap.draw(bitmapImage!, in: extent)
let scaledImage = bitmap.makeImage()
return UIImage.init(cgImage: scaledImage!)
}
