# iOS **BCC Finger** is a library meant to be integrated into an iOS application from a `.framework` file. It uses the device’s camera to take a picture of fingerprints for biometric purposes. This Manual is updated for BCC Finger Photo iOS version 5.2.0. ## Requirements * Git * Cocoapods, available at . ## Installation ### Installing Dependencies 1 - Add the following Pods to the application dependencies on Podfile: ```ruby pod 'lottie-ios' ``` {% hint style="info" %} If the application does not possess a Podfile, it can be created in the root folder of your Xcode project using the command `pod init` in the terminal. {% endhint %} It is preferable to use dynamic frameworks. It can be indicated using the flag `use_frameworks!` on Podfile. A Podfile example with a target called BCCs-Sample is shown below: ```ruby target 'BCCs-Sample' do use_frameworks! pod 'lottie-ios' end post_install do |installer| installer.pods_project.targets.each do |target| target.build_configurations.each do |config| config.build_settings['BUILD_LIBRARY_FOR_DISTRIBUTION'] = 'YES' end end end ``` {% hint style="warning" %} It is recommended to use the minimum supported iOS version for your application as the same of this framework: iOS 15.0, as the example above. {% endhint %} 2 - Close your Xcode project and open at the terminal the folder where is your Podfile, then execute: ```bash $ pod install ``` After the execution finishes, a file with `.xcworkspace` extension will be created in the same folder. 3 - Open the new `.xcworkspace` file. {% hint style="warning" %} From now on, every time the user wants to open the project, it is necessary to open it through this `.xcworkspace` file, as it includes the dependencies. {% endhint %} ### Importing and Configuring #### Importing the Project * **Importing the Project** * Open the project using the `.xcworkspace` file. * Add the `FingerPhoto.framework` file to the project, then add it to your application's framework list. * Move the `.framework` file into the project file tree. * If a frameworks folder already exists, it is recommended to move the file there * Open the project settings. * Go to the **General** tab. * Click and drag the `.framework` into the project tree under the **Frameworks, Libraries and Embedded Content** section. * Change the `BCCFinger.framework` setting from **Do not embed** to **Embed & Sign**. * Set your project target version to at least **iOS 15**. {% hint style="info" %} It is recommended to disable iPad as a target. {% endhint %} #### Initial Configuration This version does not have dependencies on Firebase, either from an initial configuration called by AppDelegate. The only initial configuration needed is that the application must request camera use permission. To do so, add the following key in the `info.plist file`, at Information Property List: ```none Privacy - Camera Usage Description ``` The key value is a message to be exhibited to the user when requesting camera use permission. This value can be blank or filled with the desired message. ## Usage ### Parameters and Constructor A simple library usage example is shown below: ```swift // To initialize a new capture BCCFingerBuilder(self, delegate: self).initializeCapture() ``` The `BCCFingerBuilder` class takes the following parameters: * `hostVC: UIViewController` - View controller that calls the capture screen. * `delegate: BCCFingerDelegate` - Interface responsible for notifying capture events (e.g. failure or success). The `initialize` method also accepts an optional parameter, ans shown below: ```swift public func initializeCapture( _ navController: UINavigationController? = nil ) { // ... } ``` If you want the navigation to run through a navigation controller, you must provide it when calling the method. The `BCCFingerBuilder` class is responsible for handling the usage configuration for `BCCFinger`. The following parameters are accepted for configuring biometric capture and software behaviour: * `setSkipCaptureOption(_ enable: Bool)` - Enables the option to skip the current capture. * `setDebugMode(_ enable: Bool)` - Enables debug mode. * `buildCaptures(_ captures: BCCFingerCaptureType)` - Defines the fingerprint capture type. The options are: ```swift public enum BCCFingerCaptureType { case BOTH_HANDS case ONLY_LEFT_HAND case ONLY_RIGHT_HAND case THUMBS case LEFT_THUMB case RIGHT_THUMB case FULL_HANDS case FULL_LEFT_HAND case FULL_RIGHT_HAND } ``` * `BOTH_HANDS` - Both hands without thumbs. * `ONLY_LEFT_HAND` - Left hand only, without thumbs. * `ONLY_RIGHT_HAND` - Right hand only, without thumbs. * `THUMBS` - Both thumbs. * `LEFT_THUMB` - Left thumb only. * `RIGHT_THUMB` - Right thumb only. * `FULL_HANDS` - Both hands with thumbs. * `FULL_LEFT_HAND` - Left hand only, with thumbs. * `FULL_RIGHT_HAND` - Right hand only, with thumbs. * `buildBeginDelaySeconds(_ delay: Float)` - Defines the delay to start threshold auto adjustment. * `buildThreshold` - Defines threshold parameters. * `setShowInstructions(_ enable: Bool)` – When set to `true`, enables the instruction screen (default: `false`). For reference, the full list of parameters and default values is: ```swift var skipsHandOption: Bool = false var debugMode: Bool = false var capture: BCCFingerCaptureType = .FULL_HANDS var beginDelaySeconds: Float = 1 var minQuality: Int = 20 var maxQuality: Int = 80 var totalTime: Double = 30 var stepCount: Int = 30 var showInstructions: Bool = true var shouldIntercalateInstructions: Bool = true ``` ### Return Values The results from the last fingerprint capture can be retrieved through the `fingerCaptureDidFinish` method from the `BCCFingerDelegate` interface: ```swift func fingerCaptureDidFinish( _ returnData: BCCFingerReturnData, analytics: BCCFingerAnalytics ) ``` The `returnData` object contains the following methods for data retrieval: * `getCapturedFingersIndexes()` - Returns a list with the index of all captured fingerprints: ```swift public enum FingerIndex: Int { case leftLittle = 0 case leftRing = 1 case leftMiddle = 2 case leftIndex = 3 case leftThumb = 4 case rightThumb = 5 case rightIndex = 6 case rightMiddle = 7 case rightRing = 8 case rightLittle = 9 } ``` * `getCapturedFingers()` - Returns a map that relates the finger indexes to the captured biometrics. * `getCapturedFingersData()` - Returns the list of all fingerprints captured: ```swift public var fingerprintPNG: UIImage public var wsqAsBase64: String ``` * `fingerprintPNG` - PNG image of the fingerprint in grayscale. * `wsqAsBase64` - base64 encoded WSQ image of the fingerprint. * `getSkippedFingers()` - Returns the index list of all skipped finger captures. The `BCCFingerReturnData` class also contains attributes that store the capture information grouped by hand: ```swift public class BCCFingerReturnData { public let leftHand: HandData? public let rightHand: HandData? } ``` These attributes can be null whenever captures are not requested for any of the hands. The `HandData` class contains the following information: ```swift public internal(set) var capturedFingers: [FingerIndex : FingerData] = [:] public internal(set) var skippedFingers: [FingerIndex] = [] public internal(set) var handsPhoto: UIImage? = nil public internal(set) var thumbsPhoto: UIImage? = nil ``` * `capturedFingers` - Map that relates the finger index to the fingerprint image. * `skippedFingers` - Index list of all skipped finger captures. * `handsPhoto` - Original photo of the hand from which the fingerprints were extracted. * `thumbPhoto` - Original photo of the thumb. If the user aborts the capture, closing before capturing the biometrics, the method `fingerCaptureDidAbort` will be called. You can implement this method to treat this scenario. #### Retrieving Original Images It is possible to get the original images through the `BCCFingerReturnData` class, as shown below: ```swift let leftSlapPhoto = returnData.leftHand?.handsPhoto let rightSlapPhoto = returnData.rightHand?.handsPhoto let leftThumbPhoto = returnData.leftHand?.thumbsPhoto let rightThumbPhoto = returnData.rightHand?.handsPhoto ``` ### Sample Project This is a functional sample project for a fingerprint capture using BCC Mobile Finger iOS: ```swift import UIKit import FingerPhoto import BCCFinger class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() } @IBAction func startCaptureAction(_ sender: UIButton) { BCCFingerBuilder(self, delegate: self) .initializeCapture() } } extension ViewController: BCCFingerDelegate { func fingerCaptureDidFinish( _ returnData: BCCFinger.BCCFingerReturnData, analytics: BCCFinger.BCCFingerAnalytics ) { // ... } func didAbortFingerCapture( analytics: BCCFinger.BCCFingerAnalytics ) { // ... } } ``` ## Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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