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RSBarcodes, now in Swift.

Build Status codecov.io Carthage compatible

RSBarcodes allows you to read 1D and 2D barcodes using the metadata scanning capabilities introduced with iOS 7 and generate the same set of barcode images for displaying and sharing. Now implemented in Swift.

TODO

Generators

Reader

Installation

Swift Package Manager

To add a package dependency to your Xcode project, select File > Swift Packages > Add Package Dependency and enter https://github.com/yeahdongcn/RSBarcodes_Swift to the text field.

CocoaPods

Simply add the following lines to your Podfile:

# required by Cocoapods 0.36.0.rc.1 for Swift Pods
use_frameworks!

pod 'RSBarcodes_Swift', '~> 5.2.0'

You will need to import RSBarcodes_Swift manually in the ViewController file after creating the file using wizard.

(CocoaPods v0.36 or later required. See this blog post for details.)

Carthage

Simply add the following line to your Cartfile:

github "yeahdongcn/RSBarcodes_Swift" >= 5.2.0

You will need to import RSBarcodes_Swift manually in the ViewController file after creating the file using wizard.

Swift Package Manager (required Xcode 11)

  1. Select File > Swift Packages > Add Package Dependency. Enter https://github.com/yeahdongcn/RSBarcodes_Swift in the "Choose Package Repository" dialog.
  2. In the next page, specify the version resolving rule as "Up to Next Major" with the latest version.
  3. After Xcode checking out the source and resolving the version, you can choose the "RSBarcodes_Swift" library and add it to your app target.

Manual

  1. Add RSBarcodes_Swift as a submodule by opening the Terminal, cd-ing into your top-level project directory, and entering the command git submodule add https://github.com/yeahdongcn/RSBarcodes_Swift.git
  2. Open the RSBarcodes_Swift folder, and drag RSBarcodes.xcodeproj into the file navigator of your app project.
  3. In Xcode, navigate to the target configuration window by clicking on the blue project icon, and select the application target under the "Targets" heading in the sidebar.
  4. Ensure that the deployment target of RSBarcodes.framework matches that of the application target.
  5. In the tab bar at the top of that window, open the "Build Phases" panel.
  6. Expand the "Target Dependencies" group, and add RSBarcodes.framework.
  7. Click on the + button at the top left of the panel and select "New Copy Files Phase". Rename this new phase to "Copy Frameworks", set the "Destination" to "Frameworks", and add RSBarcodes.framework.
  8. Need to import RSBarcodes manually in the ViewController file after creating the file using wizard.

Usage

How to Use Generator and How to Use Reader

Generators

First, import the following frameworks:

import RSBarcodes_Swift
import AVFoundation

Then, use the generator to generate a barcode. For example:

RSUnifiedCodeGenerator.shared.generateCode("2166529V", machineReadableCodeObjectType: AVMetadataObjectTypeCode39Code)

It will generate a UIImage instance if the 2166529V is a valid code39 string. For AVMetadataObjectTypeCode128Code, you can change useBuiltInCode128Generator to false to use my implementation (AutoTable for code128).

P.S. There are 4 tables for encoding a string to code128, TableA, TableB, TableC and TableAuto; the TableAuto is always the best choice, but if one has specific requirements, try this:

RSCode128Generator(codeTable: .A).generateCode("123456", machineReadableCodeObjectType: AVMetadataObjectTypeCode128Code)

Example of these simple calls can be found in the test project.

Reader

The following are steps to get the barcode reader working:

  1. File -> New -> File
  2. Under iOS click source and make sure Cocoa Touch Class is selected and hit Next.
  3. Call the name of the class whatever you want but I will refer to it as ScanViewController from now on.
  4. Make it a subclass of RSCodeReaderViewController and ensure the language is Swift and hit Next and then Create
  5. Open your storyboard and drag a UIViewController onto it.
  6. Show the identity inspect and under custom class select ScanViewController
  7. The focus mark layer and corners layer are already there working for you. There are two handlers: one for the single tap on the screen along with the focus mark and one detected objects handler, which all detected will come to you. Now in the ScanViewController.swift file add the following code into the viewDidLoad() or some place more suitable for you:
override func viewDidLoad() {
    super.viewDidLoad()

    self.focusMarkLayer.strokeColor = UIColor.red.cgColor

    self.cornersLayer.strokeColor = UIColor.yellow.cgColor

    self.tapHandler = { point in
        print(point)
    }

    self.barcodesHandler = { barcodes in
        for barcode in barcodes {
            print("Barcode found: type=" + barcode.type + " value=" + barcode.stringValue)
        }
    }
}

If you want to ignore some code types (for example, AVMetadataObjectTypeQRCode), add the following lines:

let types = NSMutableArray(array: self.output.availableMetadataObjectTypes)
types.remove(AVMetadataObjectTypeQRCode)
self.output.metadataObjectTypes = NSArray(array: types)

Validator

To validate codes:

let isValid = RSUnifiedCodeValidator.shared.isValid(code, machineReadableCodeObjectType: AVMetadataObjectTypeEAN13Code)

Image helpers

Use RSAbstractCodeGenerator.resizeImage(source: UIImage, scale: CGFloat) to scale the generated image.

Use RSAbstractCodeGenerator.resizeImage(source: UIImage, targetSize: CGSize, contentMode: UIViewContentMode) to fill/fit the bounds of something to the best capability and don't necessarily know what scale is too much to fill/fit, or if the UIImageView itself is flexible.

Miscellaneous

The Swift Programming Language 中文版

Online version generated using GitBook

License

The MIT License (MIT)

Copyright (c) 2012-2014 P.D.Q.

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.