不用第三方依旧玩出绚丽的二维码，完全原生态，不受第三方制约，不受第三方威胁，话不多说直接上代码（swift版本）
/**
给二维码添加水印图片
- author: 很傻很天真
- date: 16-08-28 16:08:36
- parameter superImage: 二维码
- parameter subImage: logo
- parameter postRext: logo的位置
- returns: 加水印图片的新图片
*/
private func imageView_add_Image(superImage:UIImage ,subImage:UIImage ,postRext:CGRect) -> UIImage {
UIGraphicsBeginImageContext(superImage.size)
superImage.drawInRect(CGRect(x: 0, y: 0, width: superImage.size.width, height: superImage.size.height))
subImage.drawInRect(postRext)
let resultImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext();
return resultImage
}
/**
设置整体的大小
- author: 很傻很天真
- date: 16-08-28 16:08:23
- parameter ciImage: 需要改变的CIimage
- parameter float_width: 为了设置比例系数
- returns: 设置后的图片
*/
private func she_zhi_tu_pian_da_xiao(ciImage:CIImage ,float_width:CGFloat) -> UIImage {
let extent = CGRectIntegral(ciImage.extent)
let scale = min(float_width / CGRectGetWidth(extent), float_width / CGRectGetHeight(extent))
let width = CGRectGetWidth(extent) * scale
let height = CGRectGetHeight(extent) * scale
let cs = CGColorSpaceCreateDeviceGray()
let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.None.rawValue)
//iOS7以后 CGBitmapContextCreate 有所改变但是依旧需要无符号32进制 所以取 rawValue
let bitmapRef = CGBitmapContextCreate(nil, Int(width), Int(height), 8, 0, cs, bitmapInfo.rawValue)
let context = CIContext(options: [kCIContextUseSoftwareRenderer:(true)])
let bitmapImage = context.createCGImage(ciImage, fromRect: extent)
CGContextSetInterpolationQuality(bitmapRef, CGInterpolationQuality.None)
CGContextScaleCTM(bitmapRef, scale, scale)
CGContextDrawImage(bitmapRef, extent, bitmapImage);
// 保存bitmap到图片
let scaledImage = CGBitmapContextCreateImage(bitmapRef)
return UIImage(CGImage: scaledImage!)
}
/**
声明一个共有方法 供外界调用
- author: 很傻很天真
- date: 16-08-28 16:08:56
- parameter urlString: 需要的信息
- parameter superView: imageView
- parameter logo: logo的位置
- parameter logoSize: logo的大小
- parameter cornerRadius: 边角裁剪度
- returns: 最终的二维码
*/
class func chuang_jian_QRCode(urlString:String ,superView:UIView ,logo:UIImage ,logoSize:CGSize , cornerRadius:CGFloat) -> ZSC_QR_ImageView {
let QR_Code = ZSC_QR_ImageView()
QR_Code.frame = CGRect(x: 0, y: 0, width: superView.frame.size.width, height: superView.frame.size.height)
let filter = CIFilter.init(name: "CIQRCodeGenerator")//CIQRCodeGenerator代表创建二维码 不可改变
filter?.setDefaults()
filter?.setValue(urlString.dataUsingEncoding(NSUTF8StringEncoding), forKey: "inputMessage")//inputMessage为固定的 代表输入信息的意思
let ciImage = filter?.outputImage//输出的图片信息
var qrImage = QR_Code.she_zhi_tu_pian_da_xiao(ciImage!, float_width: superView.frame.width)
var cornerRadius1 = cornerRadius
if !logo.isEqual(nil) {
if cornerRadius1 < 0 {
cornerRadius1 = 0
}
qrImage = QR_Code.imageView_add_Image(qrImage, subImage: QR_Code.jie_qu_bian_jiao(cornerRadius1, image: logo), postRext: CGRectMake((superView.frame.size.width - logoSize.width)/2, (superView.frame.size.height - logoSize.height)/2, logoSize.width, logoSize.height))
}
QR_Code.layer.contents = qrImage.CGImage
superView.addSubview(QR_Code)
return QR_Code
}
/**
截取logo的边角
- author: 很傻很天真
- date: 16-08-28 16:08:23
- parameter cornerRadius: 截取度
- parameter image: 需要截取边角的图片
- returns: 截取边角后的图片
*/
private func jie_qu_bian_jiao(cornerRadius:CGFloat,image:UIImage) -> UIImage {
let frame = CGRectMake(0, 0, image.size.width, image.size.height)
UIGraphicsBeginImageContextWithOptions(image.size, false, 1.0);
UIBezierPath.init(roundedRect: frame, cornerRadius: cornerRadius).addClip()
image.drawInRect(frame)
let im = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return im
}
效果图
对应的Demo地址：https://github.com/897153662/make_a_QRCode-swift-.git
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