Swift快速集成函数使用篇(生成二维码)

来源：互联网发布：去网吧带windows to go 编辑：程序博客网时间：2024/06/06 08:17

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

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