Swift UIView转Image/二维码生产

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///View转Image
    static func getViewScreenshot(view: UIView) -> UIImage {
        UIGraphicsBeginImageContextWithOptions(view.bounds.size, false, UIScreen.main.scale)
        view.layer.render(in: UIGraphicsGetCurrentContext()!)
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image!
    }
    ///生产二维码
    static func createQRForString(_ qrString: String?) -> UIImage? {
        if let sureQRString = qrString {
            let stringData = sureQRString.data(using: String.Encoding.utf8, allowLossyConversion: false)
            let qrFilter = CIFilter(name: "CIQRCodeGenerator")
            qrFilter?.setValue(stringData, forKey: "inputMessage")
            qrFilter?.setValue("H", forKey: "inputCorrectionLevel")
            let qrCIImage = qrFilter?.outputImage
            
            let colorFilter = CIFilter(name: "CIFalseColor")!
            colorFilter.setDefaults()
            colorFilter.setValue(qrCIImage, forKey: "inputImage")
            colorFilter.setValue(CIColor(red: 0, green: 0, blue: 0), forKey: "inputColor0")
            colorFilter.setValue(CIColor(red: 1, green: 1, blue: 1), forKey: "inputColor1")
            let codeImage = UIImage(ciImage: (colorFilter.outputImage!.transformed(by: CGAffineTransform(scaleX: 5, y: 5))))
            return codeImage
        }
        return nil
    }