如何生成EAN13条形码

Question

我试图创建一个简单的EAN13图像来显示String中的条形码。

我试过使用这个代码，但它只能生成一个代码128。我可以使用什么生成EAN13？

class Barcode {
  class func fromString(string : String) -> UIImage? {
      let data = string.dataUsingEncoding(NSASCIIStringEncoding)
      let filter = CIFilter(name: "CICode128BarcodeGenerator")
      filter.setValue(data, forKey: "inputMessage")
      return UIImage(CIImage: filter.outputImage)
  }
}
let img = Barcode.fromString("1234567890123")

Answer 1

您可以尝试此EAN13条形码生成器

用法非常简单：

BarCodeView *barCodeView = [[BarCodeView alloc] initWithFrame:kBarCodeFrame];
[self.view addSubview:barCodeView];
[barCodeView setBarCode:GetNewRandomEAN13BarCode()];

Answer 2

我为osx支付的两美分。。

func barCodeFromString(string : String, destSize: NSSize) -> NSImage? {
    let data = string.data(using: .ascii)
    guard let filter = CIFilter(name: "CICode128BarcodeGenerator") else{
        return nil
    }
    filter.setValue(data, forKey: "inputMessage")
    guard let ciImage : CIImage = filter.outputImage else{
        return nil
    }
    let c_size = ciImage.extent.size
    let w_ratio = destSize.width/c_size.width
    let h_ratio = destSize.height/c_size.height
    let ratio = w_ratio>h_ratio ? h_ratio : w_ratio
    let transform = CGAffineTransform(scaleX: ratio, y: ratio)
    let scaled = ciImage.transformed(by: transform)
    let rep = NSCIImageRep(ciImage: scaled)
    let nsImage = NSImage(size: rep.size)
    nsImage.addRepresentation(rep)
    return nsImage
}