无法从生成的QRCode中获取信息

Question

我正在尝试使用多个字符串生成QRCode。它正在工作，但生成的图像QRCode在imageView内部太小，因此无法读取它（至少我认为这就是为什么我无法从中获取信息）。

它的外观如下：

就像这样我生成它：

func generateQRWithInfo(){
    var aggregateData = [String: NSData]()

    if let firstName = firstName?.data(using: String.Encoding.isoLatin1, allowLossyConversion: false) {
        aggregateData.updateValue(firstName as NSData, forKey: "firstName")

    }

    if let lastName = lastName?.data(using: String.Encoding.isoLatin1, allowLossyConversion: false) {
        aggregateData.updateValue(lastName as NSData, forKey: "lastName")
    }

    if let job = job?.data(using: String.Encoding.isoLatin1, allowLossyConversion: false) {
        aggregateData.updateValue(job as NSData, forKey: "job")
    }

    if let organization = organization?.data(using: String.Encoding.isoLatin1, allowLossyConversion: false) {
        aggregateData.updateValue(organization as NSData, forKey: "organization")
    }

    if let mobilePhone = mobilePhone?.data(using: String.Encoding.isoLatin1, allowLossyConversion: false) {
        aggregateData.updateValue(mobilePhone as NSData, forKey: "mobilePhone")
    }

    if let workPhone = workPhone?.data(using: String.Encoding.isoLatin1, allowLossyConversion: false) {
        aggregateData.updateValue(workPhone as NSData, forKey: "workPhone")
    }

    if let email = email?.data(using: String.Encoding.isoLatin1, allowLossyConversion: false) {
        aggregateData.updateValue(email as NSData, forKey: "email")
    }

    let archived = NSKeyedArchiver.archivedData(withRootObject: aggregateData)
    let filter = CIFilter(name: "CIQRCodeGenerator")

    filter?.setValue(archived, forKey: "inputMessage")
    filter?.setValue("Q", forKey: "inputCorrectionLevel")

    let qrCodeImage = filter?.outputImage
    let context = CIContext(options: nil)
    //let cgImage = context.createCGImage(qrCodeImage!, from: (qrCodeImage?.extent)!)

    let transform = CGAffineTransform(scaleX: 50,y: 50)

    let output = filter?.outputImage?.applying(transform)

    let newImage = UIImage(ciImage: output!)

    qrImageView.image = newImage
}

我不知道它应该是怎么回事，但是我无法从中获取信息。我做错了什么？

Answer 1

QR码根据这些参数保存大量数据。

• 数据类型
• 尺寸a.k.a像素
• 纠错级别

数据类型可以是数字，字母数字和二进制。 基于可能的损耗恢复，可以将纠错级别分类为类型L，M，Q和H.

根据您的情况，您希望生成30 * 30个字母数字，因此显然您无法存储超过允许的值。所以要把它做大或减少数据。要记下所有QR码阅读器都不一样。

有关详细信息，请查看此table