How to generate a EAN13 barcode?

问题

I'm trying to create a simple EAN13 image to show a barcode from a String.

I tried with this code but it can only generate a code128. What can I use to generate a 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")

回答1:

you can try this EAN13BarcodeGenerator

Usage is pretty simple:

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

回答2:

Works perfect with EAN 13

  func generateBarcode(from string: String) -> UIImage? {
    let data = string.data(using: String.Encoding.ascii)

    if let filter = CIFilter(name: "CICode128BarcodeGenerator") {
      filter.setValue(data, forKey: "inputMessage")
      let transform = CGAffineTransform(scaleX: 15, y: 15)

      if let output = filter.outputImage?.transformed(by: transform) {
        return UIImage(ciImage: output)
      }
    }

    return nil
  }

Usage:

barCodeImageView.image = generateBarcode(from: "1234567890123")

回答3:

my two cents for osx..

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
}

来源：https://stackoverflow.com/questions/34420610/how-to-generate-a-ean13-barcode

标签

ios

swift

barcode

ean-13