Index out of range when printing image

[MrGD0924]

how to fix it? Please give me response....

[MrGD0924]

import Printer

class ViewController: UIViewController {

let pm = PrinterManager()
let a = "3025856504282187562209314690839033975462381239936941770344840034144563413477955812966608888478861688170367239204693672108967226008937498861858661874577081699385849994003420752137009590997581532249708930640325165906723111760564674259827980794930442717664614029549142170395528352178494728525469158037062010011689105259"

override func viewDidLoad() {
    super.viewDidLoad()
}

@IBAction func touchPrint(sender: UIButton) {

    let image = generateQRCode(from: a)
    if pm.canPrint {

        var receipt = Receipt(
            .dividing,
            .image(image!, attributes: [ImageBlock.PredefinedAttribute.alignment(.center)]),
            //  Updated by Pradeep Sakharelia on 15/05/19
            .dividing
        )
        
        receipt.feedLinesOnTail = 2
        receipt.feedPointsPerLine = 60
        
        pm.print(receipt)
    } else {

        performSegue(withIdentifier: "ShowSelectPrintVC", sender: nil)
    }
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if let vc = segue.destination as? PrinterTableViewController {
        vc.sectionTitle = "Choose Printer"
        vc.printerManager = pm
    }
}

func generateQRCode(from string: String) -> UIImage? {
   // Get data from the string
    let data = string.data(using: String.Encoding.ascii)
    // Get a QR CIFilter
    guard let qrFilter = CIFilter(name: "CIQRCodeGenerator") else { return nil}
    // Input the data
    qrFilter.setValue(data, forKey: "inputMessage")
    // Get the output image
    guard let qrImage = qrFilter.outputImage else { return nil}
    // Scale the image
    let transform = CGAffineTransform(scaleX: 10, y: 10)
    let scaledQrImage = qrImage.transformed(by: transform)
    // Invert the colors
    guard let colorInvertFilter = CIFilter(name: "CIColorInvert") else { return nil}
    colorInvertFilter.setValue(scaledQrImage, forKey: "inputImage")
    guard let outputInvertedImage = colorInvertFilter.outputImage else { return nil}
    // Replace the black with transparency
    guard let maskToAlphaFilter = CIFilter(name: "CIMaskToAlpha") else { return nil}
    maskToAlphaFilter.setValue(outputInvertedImage, forKey: "inputImage")
    guard let outputCIImage = maskToAlphaFilter.outputImage else { return nil}
    // Do some processing to get the UIImage
    let context = CIContext()
    guard let cgImage = context.createCGImage(outputCIImage, from: outputCIImage.extent) else { return nil}
    return UIImage(cgImage: cgImage)
}

}

[AlekseyPakAA]

Try to create an image where width % 8 == 0. I think there's a bug related to rounding.

[ramniwaseasyeat]

Any solution on this, I'm also facing same problem

[chibombo]

Actually, the develop branch has a TODO that says "Make sure Image you want to print with esc/pos is square, like 32x32, 64x64, or 128x128. I have modified Printer project as well as Example in pull request. Hope it prints well."

[KevinGong2013]

Image command has rewrite.
please test with latest code.