iOS 使用ZBarSDK扫描条形码和二维码

ZBarSDK，一个比较优秀的开源项目，使用起来也很简单。

ZBarSDK是一个开源的SDK，可从这里下载到源码，该SDK实现了识别和读取各种条形码，包括EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 39, Interleaved 2 of 5 和 QR Code。

帮助文档：http://zbar.sourceforge.net/iphone/sdkdoc/index.html

Step1.使用ZBarSDK 需要导入的framework

1.AVFoundation.framework

2.CoreMedia.framework

3.CoreVideo.framework

4.QuartzCore.framework

5.libiconv.dylib

Step2.在ViewController.h 导入#import "ZBarSDK.h"

Step3.在ViewController.h 继承 <ZBarReaderDelegate>协议

Step4.写代码：

ViewController.h

#import   #import "ZBarSDK.h"    @interface ViewController : UIViewController  @property (weak, nonatomic) IBOutlet UIImageView *imageView;  - (IBAction)scan:(id)sender;  @property (weak, nonatomic) IBOutlet UILabel *label;      @end

ViewController.m

#import "ViewController.h"  #import "ZBarSDK.h"    @interface ViewController ()    @end    @implementation ViewController    - (void)viewDidLoad  {      [super viewDidLoad];   // Do any additional setup after loading the view, typically from a nib.  }    - (void)didReceiveMemoryWarning  {      [super didReceiveMemoryWarning];      // Dispose of any resources that can be recreated.  }      - (IBAction)scan:(id)sender {                  ZBarReaderViewController * reader = [ZBarReaderViewController new];      reader.readerDelegate = self;      ZBarImageScanner * scanner = reader.scanner;      [scanner setSymbology:ZBAR_I25 config:ZBAR_CFG_ENABLE to:0];        reader.showsZBarControls = YES;            [self presentViewController:reader animated:YES completion:nil];            }      -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info  {      id results = [info objectForKey:ZBarReaderControllerResults];      ZBarSymbol * symbol;      for(symbol in results)          break;            _imageView.image = [info objectForKey:UIImagePickerControllerOriginalImage];            [picker dismissViewControllerAnimated:YES completion:nil];            _label.text = symbol.data;  }      @end

  在界面上放置一个UIImageView/UILabel/UIButton, UIImageView 用于显示扫描到的图像，UILabel用于显示扫描到的信息，UIButton 用于响应事件。

  布局如图：