iOS SDK

This page sets out step-by-step instructions for setting up your App Drop-in via the iOS SDK.

Prerequisites

• You need your API credential set.

• Provide your Fourthline delivery manager with the GitHub usernames and email addresses of your staff who need access to our repositories.

Operating system specifications:

• Minimum iOS version: 13
• MRZ detection in the document scanner requires minimum iOS 13.

Device specifications:

• Any device running the minimum supported OS version with a functioning camera is supported. For optimal performance, we recommend using a device capable of capturing high-quality images.

Configuration

Age requirement

Configurable

You can dynamically configure the minimum client age requirement and the related checks during Identity Verification workflows.

Document data

Configurable

Discuss with your Fourthline delivery manager what data to extract from identity document photos via optical character recognition (OCR>):

Identity data

Configurable

If you want to receive a copy of the identity data gathered by the App Drop-in when it's uploaded to our backend (before case processing), let your Fourthline delivery manager know.

Real-time feedback

Configurable

Agree with your Fourthline delivery manager whether you want to enable real-time feedback. The SDKs send the document photos to our backend as soon as they are captured, where we assess the image quality and provide the client feedback in the UI in real time. This ensures higher-quality photos are ultimately uploaded, reduces sendbacks>, and improves user experience.

Supported devices

Support

For questions about supported devices, contact your Fourthline delivery manager.

Selfie video depth camera data

While recording the selfie video, Fourthline also collects depth camera data to help confirm liveness. This functionality uses Apple TrueDepth technology on every model later than iPhone X 2017, including iPhone 11 and higher, but excluding iPhones SE 2020 and SE 5G 2022.

Identity Verification

Setup

You can add the SDK to your project using Swift Package Manager, CocoaPods, or Carthage.

1. To ensure clients grant camera and location permissions, in the Info.plist file, add Privacy - Camera Usage Description and Privacy - Location When In Use Usage Description entries.

2. If configuring Document NFC, add Near Field Communication Tag Reading capability to your app, containing the following values:

• Tag-Specific Data Protocol (TAG)
• Password Authenticated Connection Establishment (PACE)

Note

The YOUR_PROJECT_NAME.entitlements file is added to your project automatically.

Example entitlements file source code:

 <dict>
 <key>com.apple.developer.nfc.readersession.formats</key>
 <array>
 <string>TAG</string>
 <string>PACE</string>
 </array>
 </dict>

Then, to ensure clients grant NFC permissions, in the Info.plist file, add Privacy - NFC Scan Usage Description and Privacy - Location When In Use Usage Description entries.

3. In the Info.plist file, add an ISO7816 application identifiers for NFC Tag Reader Session entry containing the following 2 keys:

• A0000002471001: Application ID for e-passport
• A00000045645444C2D3031: Application ID for Dutch driving license

//1. Install Carthage on your machine. See GitHub – [Carthage](https://github.com/Carthage/Carthage) <img src="https://files.readme.io/f7f4159-Open_new_tab.svg" align="left"/>.
//2. Ensure the Carthage version is at least **0.38**. If installed via HomeBrew, you can check this with the following command: `brew list --versions carthage`
//3. Add **Cartfile** to the root of your project (or extend an existing one):

github "Fourthline-com/FourthlineSDK-iOS" == version.to.integrate

//4. Open a terminal and in your project root folder, run `carthage update --platform iOS --use-xcframeworks`. 
//5. Authenticate in Fourthline's SDK repository using the credentials provided by your Fourthline delivery manager.
//6. Go to the `Carthage/Build/iOS` folder, and then drag all the frameworks into the `Frameworks, libraries, and embedded content` section in Xcode. 
//7. Set the `Embed` value to `Embed & sign`.

//1. Install CocoaPods on your machine. See CocoaPods – [Installation](https://guides.cocoapods.org/using/getting-started.html) <img src="https://files.readme.io/f7f4159-Open_new_tab.svg" align="left"/>.
//2. Add **Podfile** to the root of your project (or extend an existing one):

source 'https://github.com/Fourthline-com/FourthlineSDK-iOS-Specs.git' # to add our private pod
source 'https://github.com/CocoaPods/Specs.git' # to add other public pods

$version = 'version.to.integrate'
use_frameworks!
platform :ios, '12.0'
target 'YourTargetName' do
 pod 'FourthlineSDK', $version
end

// Minimum version: v2.30.0
//1. In Xcode, go to **File** > **Add packages**.
//2. Enter the following URL: `https://github.com/Fourthline-com/FourthlineSDK-iOS`
//3. Select and import the following frameworks: `FourthlineCore`, `FourthlineVision`, `FourthlineNFC`, `FourthlineKYC`, `FourthlineSDK`.

Error handling

You need to handle the following error values:

Testing

To view a mock version, launch the various modules using the following mock validation codes:

Example code:

import FourthlineSDK

override func viewDidLoad() {
 super.viewDidLoad()
 
 let customization = WorkflowConfig(
 networkEnvironment: .mock
 )
 Orca.workflow(validationCode: "A1B2C3D4")
 .configure(with: customization)
 .present(completionBlock: { _ in
 })
}

Bank Account Verification

If your workflow includes Bank Account Verification, this module redirects to the Web SDK.

To redirect the client back to your app after completing the module in the web browser, you need to register a URL scheme.

For instructions, see Apple – Register your URL scheme.

Analytics

The FourthlineCore module collects and processes iOS SDK metrics. To learn more, contact your customer success manager.

Data delegate

To receive notifications for each data group that the SDK uploads to Fourthline and a copy of the data itself, add a data delegate:

import FourthlineSDK

class MyClass {
  func launchOrca() {
    let configuration = WorkflowConfig(networkEnvironment: .mock)
    let validationCode = "xxxxxxxx"
    Orca.workflow(validationCode: validationCode)
      .configure(with: configuration)
      .addDelegate(self)
      .present { [weak self] result in
        switch result {
        case let .failure(error):
          self?.handleError(error)
        case .success:
          // Client has successfully finished the workflow.
          break
        }
      }
  }
}

// MARK: - WorkflowDataDelegate
extension MyClass: WorkflowDataDelegate {
  func didUploadData(_ data: FourthlineSDK.WorkflowResults) {
    switch data {
    case let .idv(value: idvPart):
      switch idvPart {
      case let .document(document):
        print("Did upload Document")
      case let .documentVideo(video):
        print("Did upload Document Video")
      case let .selfie(selfie):
        print("Did upload Selfie")
      case let .selfieVideo(video):
        print("Did upload Selfie Video")
      case let .nfc(nfc):
        print("Did upload Nfc")
      case let .address(address):
        print("Did upload Address")
      case let .person(person):
        print("Did upload Person")
      case let .deviceMetadata(deviceMetadata):
        print("Did upload Device Metadata")
      }
    default:
      print("Handle Workflow data...")
    }
  }
}

Temporary files

The SDKs store some data collected during workflows (e.g. selfie and document videos) in the tmp/fourthline folder in the client's device filesystem. This is because the videos must remain available until collected, packaged into a zipfile, and uploaded to our backend.

You must delete the temporary files when they are no longer needed, e.g. after the SDK has uploaded all data to Fourthline or immediately before the app is terminated in applicationWillTerminate.

FileManager.default.deleteFourthlineFiles()