https://github.com/rudifa/ios-qrcodegenerator

struct QRCodeGenerator: simplifies QR code generation in an iOS application.
https://github.com/rudifa/ios-qrcodegenerator

Last synced: 14 days ago
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struct QRCodeGenerator: simplifies QR code generation in an iOS application.

• Host: GitHub
• URL: https://github.com/rudifa/ios-qrcodegenerator
• Owner: rudifa
• Created: 2020-03-19T22:51:51.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2020-06-08T11:33:39.000Z (over 4 years ago)
• Last Synced: 2024-12-14T15:22:24.476Z (2 months ago)
• Language: Swift
• Homepage:
• Size: 126 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
#  QRCodeGenerator

Initially based on code from Appcoda article [Building a QR Code Generator with Core Image Filters](https://www.appcoda.com/qr-code-generator-tutorial).

Extracted and refined QRCode generation and manipulation into `struct QRCodeGenerator`.

Added controls to ViewController to manipulate text entry, size, redundancy, url encode or not, mode (.blackOnWhite, .whiteOnClear, .clearOnWhite).

## `struct QRCodeGenerator`

Generates an UIImage from the input text string.

The API consists of an initializer and input and output properties.

Initializer with default property values:

```

        init(qrText: String = "hello folks",

customUrlIdentifier: String = "textreader",

    correctionLevel: CorrectionLevel = .corrPct15,

        imageSidePt: CGFloat = 250.0,

          customUrl: Bool = false,

               mode: Mode = .blackOnWhite,

    foregroundColor: CIColor = CIColor(red: 0.206, green: 0.599, blue: 0.860)

```

Input properties:

```

var qrText: String                      // text to be encoded

var customUrlIdentifier: String         // identifier, like "textreader" in "textreader://hello"

var correctionLevel: CorrectionLevel    // correction/reundancy level

var imageSidePt: CGFloat                // side size of the quadratic generated image

var customUrl: Bool                     // false: uses qrText as is, true: creates a custom URL like "textreader://hello%20folks"

var mode: Mode                          // output mode

var foregroundColor: CIColor            // color of the QRCode image

CorrectionLevel:    corrPct7, corrPct15, corrPct25, corrPct30

Mode:               blackOnClear, blackOnColored, blackOnWhite,

                    clearOnBlack, clearOnColored, clearOnWhite,

                    coloredOnBlack, coloredOnClear, coloredOnWhite,

                    whiteOnBlack, whiteOnClear, whiteOnColored

```

Output property:

```

var uiImage: UIImage?   // the generated image

```

Create an instance with default property values:

```

var generator = QRCodeGenerator()

```

Modify its properties:

```

generator.qrText = "Hello"

customUrlIdentifier: String = "lipreader"

generator.correctionLevel = .corrPct7

generator.imageSidePt = 100.0

generator.customUrl = true

generator.mode = .clearOnWhite

generator.foregroundColor = CIColor(red: 0.99, green: 0.99, blue: 0.0)

```

Create an instance with modified properties:

```

let generator2 = QRCodeGenerator(qrText: "Bye",

     correctionLevel: .corrPct30,

     imageSidePt: 200.0,

     mode: .clearOnWhite)

```

Get the generated QR code image:

```

let image: UIImage = generator.uiImage()!

```

## class ViewController

Provides a test-and-demo UI for various foreground and background colors, QRCode image size and modes,

QRCode redundancy (7%-30%), urlEncoded or plain, and export to photos or to printer.