iOS：card.io使用

   最近项目要用到一个功能：通过扫描银行卡，获取银行卡号，在网上搜过后，选用了card.io这个SDK，过程如下：

（1）下载Card.io

      Card.io是让手机摄像头获取信用卡的信息，中间利用了OCR（光学字符识别）的扫描技术返回结果，它还推出了SDK（软件开发包），让开发者们可以把card.io添加到自己的应用当中。可以在https://github.com/paypal/PayPal-iOS-SDK下载最新的SDK

（2）添加到项目里

    1、将下载的SDK包里名为CardIO的文件拖到工程里，在TARGETS-Build Phases - Link Binary With Librarys添加下面依赖库

     * AudioToolbox 

     * AVFoundation

     * CoreGraphics

     * CoreMedia

     * CoreVideo

     * Foundation

     * MobileCoreServices

     * OpenGLES

     * QuartzCore

     * Security

     * UIKit

如果是xcode5或者更新的版本，只需要添加下面的库

    * AVFoundation

    * AudioToolbox

    * CoreMedia

    * MobileCoreServices

    * Enable Modules (C and Objective-C)

    * Link Frameworks Automatically

我是把它作为一个viewController类使用

代码：

导入

#import "CardIO.h"

- (void)viewWillAppear:(BOOL)animated {

  [super viewWillAppear:animated];

  [CardIOUtilities preload];

}

//开始扫描

- (IBAction)scanCard:(id)sender

 {

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

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

}

//取消扫描

- (void)userDidCancelPaymentViewController:(CardIOPaymentViewController *)scanViewController 

{

  NSLog(@"User canceled payment info");

  // Handle user cancellation here...

  [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);

  // Use the card info...

  [scanViewController dismissViewControllerAnimated:YES completion:nil];

}