• April 27, 2024

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.



  •  Code39
  •  Code39Mod43
  •  ExtendedCode39
  •  Code93
  •  Code128
  •  UPCE
  •  ITF14
  •  Interleaved2of5
  •  DataMatrix
  •  PDF417
  •  QR
  •  Aztec
  •  Codabar: requires iOS15.4 or later
  •  Views


  •  Views
  •  ReaderController


To add a package dependency to your Xcode project, select File > Swift Packages > Add Package Dependency and enter to the text field.

Simply add the following lines to your Podfile:

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

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.)

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 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.


  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
  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.


How to Use Generator and How to Use Reader


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, TableATableBTableC 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.


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() {

self.focusMarkLayer.strokeColor =

self.cornersLayer.strokeColor = UIColor.yellow.cgColor

self.tapHandler = { point in

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)
self.output.metadataObjectTypes = NSArray(array: types)


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.


The Swift Programming Language 中文版

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