使用ZBar来读取条形码和二维码的方法



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

5.在appDelegate文件中加入 标记部分的代码

[cpp] view plain copy print ?

1. - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions  
2. {  
3.     self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];  
4.     // Override point for customization after application launch.  
5.     self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];  
6.     self.window.rootViewController = self.viewController;  
7.     [self.window makeKeyAndVisible];  
8.       
9.       
10.     // force view class to load so it may be referenced directly from NIB  
11.     [ZBarReaderView class];  
12.       
13.       
14.     return YES;  
15. }  

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    
    
    // force view class to load so it may be referenced directly from NIB
    [ZBarReaderView class];
    
    
    return YES;
}

注意此代码：

[cpp] view plain copy print ?

1. // force view class to load so it may be referenced directly from NIB  
2.  [ZBarReaderView class];  

   // force view class to load so it may be referenced directly from NIB
    [ZBarReaderView class];

6.在.h文件中加入   ZBarReaderViewDelegate的实现，代码如下:

[cpp] view plain copy print ?

1. //  
2. //  ViewController.h  
3. //  FootSafety  
4. //  
5. //  Created by 泽宇 徐 on 12-6-12.  
6. //  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.  
7. //  
8.   
9. #import <UIKit/UIKit.h>  
10. #import "ZBarSDK.h"  
11.   
12. @interface ViewController : UIViewController<ZBarReaderViewDelegate>  
13. {  
14.     IBOutlet UILabel  * label ;  
15.     ZBarReaderView *readerView;  
16.     ZBarCameraSimulator *cameraSim;  
17. }  
18.   
19. @property(nonatomic,retain) UILabel * label ;  
20. @property (nonatomic, retain) IBOutlet ZBarReaderView *readerView;  
21.   
22.   
23. @end  

//
//  ViewController.h
//  FootSafety
//
//  Created by 泽宇 徐 on 12-6-12.
//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "ZBarSDK.h"

@interface ViewController : UIViewController<ZBarReaderViewDelegate>
{
    IBOutlet UILabel  * label ;
    ZBarReaderView *readerView;
    ZBarCameraSimulator *cameraSim;
}

@property(nonatomic,retain) UILabel * label ;
@property (nonatomic, retain) IBOutlet ZBarReaderView *readerView;


@end

7.在.m文件中要实现的主要方法是：

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1. - (void) readerView: (ZBarReaderView*) view  
2.      didReadSymbols: (ZBarSymbolSet*) syms  
3.           fromImage: (UIImage*) img  
4. {  
5.     // do something useful with results  
6.     for(ZBarSymbol *sym in syms) {  
7.         self.label.text = sym.data;  
8.         break;  
9.     }  
10. }  

- (void) readerView: (ZBarReaderView*) view
     didReadSymbols: (ZBarSymbolSet*) syms
          fromImage: (UIImage*) img
{
    // do something useful with results
    for(ZBarSymbol *sym in syms) {
        self.label.text = sym.data;
        break;
    }
}

这里是功能是读取照片信息，把条码放如label显示

[html] view plain copy print ?

1. -(void) viewDidAppear:(BOOL)animated  
2. {  
3.     // run the reader when the view is visible  
4.     [readerView start];  
5. }  

-(void) viewDidAppear:(BOOL)animated
{
    // run the reader when the view is visible
    [readerView start];
}

这个是在显示视图的时候，启动摄像头，开始扫描

[html] view plain copy print ?

1. - (void)viewDidLoad  
2. {  
3.     [super viewDidLoad];  
4.     // Do any additional setup after loading the view, typically from a nib.  
5.       
6.     // the delegate receives decode results  
7.     readerView.readerDelegate = self;  
8.       
9.     // you can use this to support the simulator  
10.     if(TARGET_IPHONE_SIMULATOR) {  
11.         cameraSim = [[ZBarCameraSimulator alloc]  
12.                      initWithViewController: self];  
13.         cameraSim.readerView = readerView;  
14.     }  
15.   
16. }  

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    
    // the delegate receives decode results
    readerView.readerDelegate = self;
    
    // you can use this to support the simulator
    if(TARGET_IPHONE_SIMULATOR) {
        cameraSim = [[ZBarCameraSimulator alloc]
                     initWithViewController: self];
        cameraSim.readerView = readerView;
    }

}

在初始化的时候，设置托管。

.m文件所有内容是：

[html] view plain copy print ?

1. //  
2. //  ViewController.m  
3. //  FootSafety  
4. //  
5. //  Created by 泽宇 徐 on 12-6-12.  
6. //  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.  
7. //  
8.   
9. #import "ViewController.h"  
10.   
11. @interface ViewController ()  
12.   
13. @end  
14.   
15. @implementation ViewController  
16. @synthesize label;  
17. @synthesize readerView;  
18.   
19. - (void)viewDidLoad  
20. {  
21.     [super viewDidLoad];  
22.     // Do any additional setup after loading the view, typically from a nib.  
23.       
24.     // the delegate receives decode results  
25.     readerView.readerDelegate = self;  
26.       
27.     // you can use this to support the simulator  
28.     if(TARGET_IPHONE_SIMULATOR) {  
29.         cameraSim = [[ZBarCameraSimulator alloc]  
30.                      initWithViewController: self];  
31.         cameraSim.readerView = readerView;  
32.     }  
33.   
34. }  
35.   
36. -(void) viewDidAppear:(BOOL)animated  
37. {  
38.     // run the reader when the view is visible  
39.     [readerView start];  
40. }  
41.   
42.   
43. - (void) readerView: (ZBarReaderView*) view  
44.      didReadSymbols: (ZBarSymbolSet*) syms  
45.           fromImage: (UIImage*) img  
46. {  
47.     // do something useful with results  
48.     for(ZBarSymbol *sym in syms) {  
49.         self.label.text = sym.data;  
50.         break;  
51.     }  
52. }  
53.   
54.   
55.   
56. - (void)viewDidUnload  
57. {  
58.     [super viewDidUnload];  
59.     // Release any retained subviews of the main view.  
60. }  
61.   
62. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation  
63. {  
64.     return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);  
65. }  
66.   
67. -(void) dealloc  
68. {  
69.     [self.readerView release];  
70.     [self.label release];  
71.     [super dealloc];  
72. }  
73.   
74. @end  

//
//  ViewController.m
//  FootSafety
//
//  Created by 泽宇 徐 on 12-6-12.
//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize label;
@synthesize readerView;

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    
    // the delegate receives decode results
    readerView.readerDelegate = self;
    
    // you can use this to support the simulator
    if(TARGET_IPHONE_SIMULATOR) {
        cameraSim = [[ZBarCameraSimulator alloc]
                     initWithViewController: self];
        cameraSim.readerView = readerView;
    }

}

-(void) viewDidAppear:(BOOL)animated
{
    // run the reader when the view is visible
    [readerView start];
}


- (void) readerView: (ZBarReaderView*) view
     didReadSymbols: (ZBarSymbolSet*) syms
          fromImage: (UIImage*) img
{
    // do something useful with results
    for(ZBarSymbol *sym in syms) {
        self.label.text = sym.data;
        break;
    }
}



- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

-(void) dealloc
{
    [self.readerView release];
    [self.label release];
    [super dealloc];
}

@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 plain copy print ?

1. ZBarReaderView *readerView;