Swift快速集成函数使用篇(生成二维码)

1 代码生成的二维码



E312AE79-44A0-472E-938C-5599B04CA92A.png

2 一行代码集成

//返回UIImage
CommonFunction.CreateQRCode("张三" , qrImageName: "张三的图片,可为空")

3 生成二维码代码

func CreateQRCode(qrString: String?, qrImageName: String?) -> UIImage?{
if let sureQRString = qrString {
let stringData = sureQRString.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)
// 创建一个二维码的滤镜
let qrFilter = CIFilter(name: "CIQRCodeGenerator")
qrFilter!.setValue(stringData, forKey: "inputMessage")
qrFilter!.setValue("H", forKey: "inputCorrectionLevel")
let qrCIImage = qrFilter!.outputImage
// 创建一个颜色滤镜,黑白色
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")
// 返回二维码image
let codeImage = UIImage(CIImage: colorFilter!.outputImage!.imageByApplyingTransform(CGAffineTransformMakeScale(5, 5)))
// 通常,二维码都是定制的,中间都会放想要表达意思的图片
if let iconImage = UIImage(named: qrImageName!) {
let rect = CGRectMake(0, 0, codeImage.size.width, codeImage.size.height)
UIGraphicsBeginImageContext(rect.size)
codeImage.drawInRect(rect)
let avatarSize = CGSizeMake(rect.size.width * 0.25, rect.size.height * 0.25)
let x = (rect.width - avatarSize.width) * 0.5
let y = (rect.height - avatarSize.height) * 0.5
iconImage.drawInRect(CGRectMake(x, y, avatarSize.width, avatarSize.height))
let resultImage = UIGraphicsGetImageFromCurrentImageContext()

UIGraphicsEndImageContext()
return resultImage
}
return codeImage
}
return nil
}

文／Hcy_

原文链接：http://www.jianshu.com/p/8872f96587e9