Implementation

The implementation shows an example of how you can add MetaMap SDK using a MetaMap button or MetaMap method.
In the last part, callback methods that are called when verification is successfully completed or when verifications is canceled. In order to learn whether the verification was successfully completed or cancelled we need to set a callback.

Start verification - showMetaMapFlow To start verification you need to use this method In order to make this work you need to set your own YOUR_CLIENT_ID and YOUR_FLOW_ID. You can find them in the Metamap Dashboard, for more details please check the Set Up An Account section.
Verification is completed - verificationSuccess when the verification is completed the method will be called
Verification is Cancelled - verificationCancelled when the verification is canceled the method will be called

import UIKit
import MetaMapSDK

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        setupMetaMapButton()
    }

    private func setupMetaMapButton() {
        // Initialize the MetaMap button
        let metaMapButton = MetaMapButton()
        metaMapButton.frame = CGRect(
            x: 20,
            y: view.frame.height / 2 - 25,
            width: view.frame.width - 40,
            height: 50
        )

        // Set up button action
        metaMapButton.addTarget(self, action: #selector(metaMapButtonTapped), for: .touchUpInside)

        // Add button to the view
        view.addSubview(metaMapButton)

        // Set delegate to receive results from MetaMap
        MetaMapButtonResult.shared.delegate = self
    }

    @objc private func metaMapButtonTapped() {
        // Present MetaMap verification flow
        MetaMap.shared.showMetaMapFlow(
            clientId: "YOUR_CLIENT_ID",
            flowId: "YOUR_FLOW_ID",
            metadata: [:]
        )
    }
}

// MARK: - MetaMapButtonResultDelegate

extension ViewController: MetaMapButtonResultDelegate {

    func verificationSuccess(identityId: String?, verificationID: String?) {
        print("✅ MetaMap Verification Succeeded")
        print("🔹 Identity ID: \(identityId ?? "nil")")
        print("🔹 Verification ID: \(verificationID ?? "nil")")
    }

    func verificationCreated(identityId: String?, verificationID: String?) {
        print("🆕 MetaMap Verification Created")
        print("🔹 Identity ID: \(identityId ?? "nil")")
        print("🔹 Verification ID: \(verificationID ?? "nil")")
    }

    func verificationCancelled(identityId: String?, verificationID: String?) {
        print("❌ MetaMap Verification Cancelled")
        print("🔹 Identity ID: \(identityId ?? "nil")")
        print("🔹 Verification ID: \(verificationID ?? "nil")")
    }
}

#import "ViewController.h"
#import <MetaMapSDK/MetaMapSDK.h>

@interface ViewController () <MetaMapButtonResultDelegate>

@property (nonatomic, strong) MetaMapButton *metaMapButton;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    // MARK: - Initialize MetaMap button
    self.metaMapButton = [[MetaMapButton alloc] init];
    self.metaMapButton.frame = CGRectMake(20, self.view.frame.size.height / 2 - 25, self.view.frame.size.width - 40, 50);
    self.metaMapButton.center = self.view.center;

    // Set action for button tap
    [self.metaMapButton addTarget:self
                           action:@selector(metaMapButtonAction:)
                 forControlEvents:UIControlEventTouchUpInside];

    // Add button to the view
    [self.view addSubview:self.metaMapButton];

    // Set delegate to receive MetaMap results
    [MetaMapButtonResult shared].delegate = self;
}

// MARK: - MetaMap Action

- (void)metaMapButtonAction:(UIButton *)sender {
    // Start MetaMap verification flow
    [MetaMap.shared showMetaMapFlowWithClientId:@"YOUR_CLIENT_ID"
                                         flowId:@"YOUR_FLOW_ID"
                                       metadata:@{}];
}

// MARK: - MetaMapButtonResultDelegate

- (void)verificationSuccessWithIdentityId:(NSString *)identityId
                           verificationID:(NSString *)verificationID {
    NSLog(@"✅ Verification Succeeded");
    NSLog(@"🔹 Identity ID: %@", identityId);
    NSLog(@"🔹 Verification ID: %@", verificationID);
}

- (void)verificationCancelledWithIdentityId:(NSString *)identityId
                             verificationID:(NSString *)verificationID {
    NSLog(@"❌ Verification Cancelled");
    NSLog(@"🔹 Identity ID: %@", identityId);
    NSLog(@"🔹 Verification ID: %@", verificationID);
}

@end

In order to make this work you need to set your own CLIENT_ID and FLOW_ID. You can find them in the Metamap Dashboard, for more details please check this section.

Congratulations! At this stage, you are already able to start the Metamap SDK and have your first verification.