iOS开发——高级技术&二维码功能的实现

二维码功能的实现

 

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

1 #import <uikit uikit.h="">

2 #import "ZBarSDK.h"

3  

4 @interface ViewController : UIViewController <zbarreaderdelegate> @property (weak, nonatomic) IBOutlet UIImageView *imageView;

5 - (IBAction)scan:(id)sender;

6 @property (weak, nonatomic) IBOutlet UILabel *label;

7  

8  

9 @end</zbarreaderdelegate></uikit>

 

ViewController.m

 1 #import "ViewController.h"

 2 #import "ZBarSDK.h"

 3  

 4 @interface ViewController ()

 5  

 6 @end

 7  

 8 @implementation ViewController

 9  

10 - (void)viewDidLoad

11 {

12     [super viewDidLoad];

13     // Do any additional setup after loading the view, typically from a nib.

14 }

15  

16 - (void)didReceiveMemoryWarning

17 {

18     [super didReceiveMemoryWarning];

19     // Dispose of any resources that can be recreated.

20 }

21  

22  

23 - (IBAction)scan:(id)sender {

24      

25      

26     ZBarReaderViewController * reader = [ZBarReaderViewController new];

27     reader.readerDelegate = self;

28     ZBarImageScanner * scanner = reader.scanner;

29     [scanner setSymbology:ZBAR_I25 config:ZBAR_CFG_ENABLE to:0];

30  

31     reader.showsZBarControls = YES;

32      

33     [self presentViewController:reader animated:YES completion:nil];

34    

35      

36 }

37  

38  

39 -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

40 {

41     id<nsfastenumeration> results = [info objectForKey:ZBarReaderControllerResults];

42     ZBarSymbol * symbol;

43     for(symbol in results)

44         break;

45      

46     _imageView.image = [info objectForKey:UIImagePickerControllerOriginalImage];

47      

48     [picker dismissViewControllerAnimated:YES completion:nil];

49      

50     _label.text = symbol.data;

51 }

52  

53  

54 @end</nsfastenumeration>

 

  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：