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
并且保证Build Settings里面这两项都是YES：
* 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"
#import "CardIOPaymentViewControllerDelegate.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];
}
下面是代理方法
//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];
}
原文地址：http://blog.csdn.net/u012890196/article/details/45041351
