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使用ZBar来读取条形码和二维码的方法

分类: 文章 • 2024-09-20 19:53:52

1.使用ZBar项目。下载地址是：http://zbar.sourceforge.net/iphone/index.html


2.新建一个项目。

3.导入 ZBar的sdk。把ZBar SDK的目录拉入项目，然后选中copy选项

4.在项目文件的target中加入 以下framework
使用ZBar来读取条形码和二维码的方法

5.在appDelegate文件中加入 标记部分的代码

[cpp]view plaincopy
  1. -(BOOL)application:(UIApplication*)applicationdidFinishLaunchingWithOptions:(NSDictionary*)launchOptions
  2. {
  3. self.window=[[[UIWindowalloc]initWithFrame:[[UIScreenmainScreen]bounds]]autorelease];
  4. //Overridepointforcustomizationafterapplicationlaunch.
  5. self.viewController=[[[ViewControlleralloc]initWithNibName:@"ViewController"bundle:nil]autorelease];
  6. self.window.rootViewController=self.viewController;
  7. [self.windowmakeKeyAndVisible];
  10. //forceviewclasstoloadsoitmaybereferenceddirectlyfromNIB
  11. [ZBarReaderViewclass];
  14. returnYES;
  15. }

注意此代码：

[cpp]view plaincopy
  1. //forceviewclasstoloadsoitmaybereferenceddirectlyfromNIB
  2. [ZBarReaderViewclass];


6.在.h文件中加入 ZBarReaderViewDelegate的实现，代码如下:
[cpp]view plaincopy
  1. //
  2. //ViewController.h
  3. //FootSafety
  4. //
  5. //Createdby泽宇徐on12-6-12.
  6. //Copyright(c)2012年__MyCompanyName__.Allrightsreserved.
  7. //
  9. #import<UIKit/UIKit.h>
  10. #import"ZBarSDK.h"
  12. @interfaceViewController:UIViewController<ZBarReaderViewDelegate>
  13. {
  14. IBOutletUILabel*label;
  15. ZBarReaderView*readerView;
  16. ZBarCameraSimulator*cameraSim;
  17. }
  19. @property(nonatomic,retain)UILabel*label;
  20. @property(nonatomic,retain)IBOutletZBarReaderView*readerView;
  23. @end

7.在.m文件中要实现的主要方法是：

[html]view plaincopy
  1. -(void)readerView:(ZBarReaderView*)view
  2. didReadSymbols:(ZBarSymbolSet*)syms
  3. fromImage:(UIImage*)img
  4. {
  5. //dosomethingusefulwithresults
  6. for(ZBarSymbol*syminsyms){
  7. self.label.text=sym.data;
  8. break;
  9. }
  10. }

这里是功能是读取照片信息，把条码放如label显示


[html]view plaincopy
  1. -(void)viewDidAppear:(BOOL)animated
  2. {
  3. //runthereaderwhentheviewisvisible
  4. [readerViewstart];
  5. }

这个是在显示视图的时候，启动摄像头，开始扫描


[html]view plaincopy
  1. -(void)viewDidLoad
  2. {
  3. [superviewDidLoad];
  4. //Doanyadditionalsetupafterloadingtheview,typicallyfromanib.
  6. //thedelegatereceivesdecoderesults
  7. readerView.readerDelegate=self;
  9. //youcanusethistosupportthesimulator
  10. if(TARGET_IPHONE_SIMULATOR){
  11. cameraSim=[[ZBarCameraSimulatoralloc]
  12. initWithViewController:self];
  13. cameraSim.readerView=readerView;
  14. }
  16. }

在初始化的时候，设置托管。


.m文件所有内容是：

[html]view plaincopy
  1. //
  2. //ViewController.m
  3. //FootSafety
  4. //
  5. //Createdby泽宇徐on12-6-12.
  6. //Copyright(c)2012年__MyCompanyName__.Allrightsreserved.
  7. //
  9. #import"ViewController.h"
  11. @interfaceViewController()
  13. @end
  15. @implementationViewController
  16. @synthesizelabel;
  17. @synthesizereaderView;
  19. -(void)viewDidLoad
  20. {
  21. [superviewDidLoad];
  22. //Doanyadditionalsetupafterloadingtheview,typicallyfromanib.
  24. //thedelegatereceivesdecoderesults
  25. readerView.readerDelegate=self;
  27. //youcanusethistosupportthesimulator
  28. if(TARGET_IPHONE_SIMULATOR){
  29. cameraSim=[[ZBarCameraSimulatoralloc]
  30. initWithViewController:self];
  31. cameraSim.readerView=readerView;
  32. }
  34. }
  36. -(void)viewDidAppear:(BOOL)animated
  37. {
  38. //runthereaderwhentheviewisvisible
  39. [readerViewstart];
  40. }
  43. -(void)readerView:(ZBarReaderView*)view
  44. didReadSymbols:(ZBarSymbolSet*)syms
  45. fromImage:(UIImage*)img
  46. {
  47. //dosomethingusefulwithresults
  48. for(ZBarSymbol*syminsyms){
  49. self.label.text=sym.data;
  50. break;
  51. }
  52. }
  56. -(void)viewDidUnload
  57. {
  58. [superviewDidUnload];
  59. //Releaseanyretainedsubviewsofthemainview.
  60. }
  62. -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
  63. {
  64. return(interfaceOrientation!=UIInterfaceOrientationPortraitUpsideDown);
  65. }
  67. -(void)dealloc
  68. {
  69. [self.readerViewrelease];
  70. [self.labelrelease];
  71. [superdealloc];
  72. }
  74. @end

在ViewController.xib文件中 增加一个view，并且修改view的类是ZBarReaderView ，并且指向 .h文件中定义的
[cpp]view plaincopy
  1. ZBarReaderView*readerView;


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