最近項目要用到一個功能：通過掃描銀行卡，獲取銀行卡號，在網上搜過後，選用了card.io這個SDK，過程如下：

（1）下載Card.io

Card.io是讓手機攝像頭獲取信用卡的信息，中間利用了OCR（光學字符識別）的掃描技術返回結果，它還推出了SDK（軟件開發包），讓開發者們可以把card.io添加到自己的應用當中。可以在https://github.com/paypal/PayPal-iOS-SDK下載最新的SDK

（2）添加到項目裡

1、將下載的SDK包裡名為CardIO的文件拖到工程裡，在TARGETS-Build Phases - Link Binary With Librarys添加下面依賴庫

 

* AudioToolbox

* AVFoundation

* CoreGraphics

* CoreMedia

* CoreVideo

* Foundation

* MobileCoreServices

* OpenGLES

* QuartzCore

* Security

* UIKit

如果是xcode5或者更新的版本，只需要添加下面的庫

 

* AVFoundation

* AudioToolbox

* CoreMedia

* MobileCoreServices

並且保證Build Settings裡面這兩項都是YES：

 

* Enable Modules (C and Objective-C)

* Link Frameworks Automatically

2、在TARGETS-Build Settings添加 -lc++到Other Linker Flags
（3）使用

我是把它作為一個viewController類使用

代碼：

導入

#import "CardIO.h"

#import "CardIOPaymentViewControllerDelegate.h"

 

- (void)viewWillAppear:(BOOL)animated {

[super viewWillAppear:animated];

[CardIOUtilities preload];

}

//開始掃描

 

- (IBAction)scanCard:(id)sender

{

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

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

}

下面是代理方法

 

//取消掃描

- (void)userDidCancelPaymentViewController:(CardIOPaymentViewController *)scanViewController

{

NSLog(@"User canceled payment info");

// Handle user cancellation here...

[scanViewController dismissViewControllerAnimated:YES completion:nil];

}

//掃描完成

-(void)userDidProvideCreditCardInfo:(CardIOCreditCardInfo *)info inPaymentViewController:(CardIOPaymentViewController *)scanViewController

{

//掃描結果

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

// Use the card info...

[scanViewController dismissViewControllerAnimated:YES completion:nil];

}