# OCR for debit and credit cards in iOS development

Language: en
Canonical: [OCR for debit and credit cards in iOS development](<https://allluckly.cn/en/journal/2015-12-07-ocr-for-debit-and-credit-cards-in-ios-development/>)
中文：[中文 HTML](<https://allluckly.cn/ocr/back>)
English: [English HTML](<https://allluckly.cn/en/journal/2015-12-07-ocr-for-debit-and-credit-cards-in-ios-development/>)
Published: 2015-12-07T00:00:00+08:00
Modified: 2026-10-23T10:44:59+08:00
Author: [Bison](<https://allluckly.cn/about/>)

Introduces card.io SDK integration for scanning card numbers, including linker settings, delegates and recognition callbacks. Objective-C and Swift examples accompany the workflow; the article specifies that the selected implementation is for credit-card scanning.

Originally credited to Bison. Content is retained as published.

English translation of the [Chinese original](<https://allluckly.cn/ocr/back>), translated on 2026-10-23. The article body uses automated translation; app descriptions, historical reading notes and video subtitles receive separate editorial checks. Original publication dates, attribution, code and version notes are retained.

**Before you read** This technical note dates from 2015–2017. The examples have not been rerun as part of this archive update. Specifies Xcode 7.1 and identifies the selected solution as a credit-card scanner.

> "iOS technical sharing, iOS development, iOS development tips, iOS development blog" Bison

Recently our company needed to scan bank cards and obtain card numbers. I searched many related resources online; full bank-card scanning  
 solutions that retrieve card numbers were extremely expensive, and the price only covered licensing. So I looked for an alternative and found one that can  
 a third-party framework that scans credit cards. I am sharing it here, but it only scans credit cards… o.0.  
 The framework is called `CardIO`  
 [Download URL](<https://github.com/AllLuckly/card.io-iOS-SDK>)  
 Here I mainly demonstrate the integration process, so watch these steps carefully.  
 I am using xcode 7.1. First, drag the whole framework into your project, then under  
 TARGETS—Build Phases—Link Binary With Libraries  
 Add the following frameworks there.  
 `Accelerate.framework`  
 `MobileCoreServices.framework`  
 `CoreMedia.framework`  
 `AudioToolbox.framework`  
 `AVFoundation.framework`  
 Also add the following under TARGETS → Build Settings → Other Linker Flags:`-ObjC` and `-lc++`

In the `VC` where it will be called, import these headers: `#import "CardIO.h"` `#import "CardIOPaymentViewControllerDelegate.h"` Then add the `CardIOPaymentViewControllerDelegate` delegate.

Then implement the methods.

## Objective-C version

```css
- (void)viewDidLoad {
    [super viewDidLoad];

    [CardIOUtilities preload];
}

//开始调用扫描
- (IBAction)begin:(id)sender {

    CardIOPaymentViewController *scanViewController = [[CardIOPaymentViewController alloc] initWithPaymentDelegate:self];

    [self presentViewController:scanViewController animated:YES completion:nil];
}


//取消扫描
- (void)userDidCancelPaymentViewController:(CardIOPaymentViewController *)scanViewController

{


    [scanViewController dismissViewControllerAnimated:YES completion:nil];

}

//扫描完成
-(void)userDidProvideCreditCardInfo:(CardIOCreditCardInfo *)info inPaymentViewController:(CardIOPaymentViewController *)scanViewController

{

    //扫描结果
    NSLog(@"Received card info. Number: %@, expiry: %02i/%i, cvv: %@.", info.redactedCardNumber, info.expiryMonth, info.expiryYear, info.cvv);

    [scanViewController dismissViewControllerAnimated:YES completion:nil];

}
```

## SWIFT version

```css
import UIKit

class ViewController: UIViewController, CardIOPaymentViewControllerDelegate {

@IBOutlet weak var resultLabel: UILabel!
override func viewDidLoad() {
    super.viewDidLoad()
    
    CardIOUtilities.preload()
}

//开始调用扫描
@IBAction func scanCard(sender: AnyObject) {
    let cardIOVC = CardIOPaymentViewController(paymentDelegate: self)
    cardIOVC.modalPresentationStyle = .FormSheet
    presentViewController(cardIOVC, animated: true, completion: nil)
}
//取消扫描
func userDidCancelPaymentViewController(paymentViewController: CardIOPaymentViewController!) {
    resultLabel.text = "user canceled"
    paymentViewController?.dismissViewControllerAnimated(true, completion: nil)
}
//扫描完成
func userDidProvideCreditCardInfo(cardInfo: CardIOCreditCardInfo!, inPaymentViewController paymentViewController: CardIOPaymentViewController!) {
    if let info = cardInfo {
        let str = NSString(format: "Received card info.\n Number: %@\n expiry: %02lu/%lu\n cvv: %@.", info.redactedCardNumber, info.expiryMonth, info.expiryYear, info.cvv)
        resultLabel.text = str as String
    }
        paymentViewController?.dismissViewControllerAnimated(true, completion: nil)
    }  
}
```

That completes it. This framework by an overseas developer is very effective; I hope to find a similarly useful third-party bank-card scanner.  
 The final result recognises the number very accurately.

![1](<https://allluckly.cn/images/backing.png>)

Recommended reading: [An illustrated guide to implementing iOS in-app purchases](<https://allluckly.cn/en/journal/2015-06-04-an-illustrated-guide-to-implementing-ios-in-app-purchases/>)

Copyright © Bison. Please retain a hyperlink to the original article when reproducing it.