二维码扫描ZBarSDK的使用

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

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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. }  

注意此代码：

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

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

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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  

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. }  

这里是功能是读取照片信息，把条码放如label显示

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

这个是在显示视图的时候，启动摄像头，开始扫描

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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. }  

在初始化的时候，设置托管。

.m文件所有内容是：

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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  

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 

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1. ZBarReaderView *readerView;  

转载地址：http://blog.youkuaiyun.com/remote_roamer/article/details/7657845

关于ZBarReaderView 自定义UI界面

-(void)scanClick:(id)sender
{
// [appDelegate runUI:VIEW_SCAN_VIEW];

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NSLog(@ " 跳转扫描扫描页面 " );   if (!self.zBarReaderView) {      self.zBarReaderView = [ZBarReaderViewController new ];      self.zBarReaderView.readerDelegate = self;      self.zBarReaderView.supportedOrientationsMask = ZBarOrientationMaskAll;      self.zBarReaderView.showsZBarControls = NO;      self.zBarReaderView.readerView.torchMode = 0 ;      [self setOverlayPickerView:self.zBarReaderView];        ZBarImageScanner *scanner = self.zBarReaderView.scanner;      [scanner setSymbology: ZBAR_I25                     config: ZBAR_CFG_ENABLE                         to: 0 ];   }   [self presentViewController:self.zBarReaderView                     animated:YES                   completion:^( void )                  {                       // Code                       NSLog(@ "弹出。。。。" );                   }];

}

/**

• 扫条形码结果
  **/

• (void) imagePickerController: (UIImagePickerController) reader
  didFinishPickingMediaWithInfo: (NSDictionary) info
  {
  id results =
  [info objectForKey: ZBarReaderControllerResults];
  ZBarSymbol *symbol = nil;
  for(symbol in results)

  ?

  1

  break ;

  //判断是否包含 头'http:'
  NSString regex = @“http+:[^\s]“;
  NSPredicate *predicate = [NSPredicate predicateWithFormat:@“SELF MATCHES %@“,regex];

  //判断是否包含 头'ssid:'
  NSString ssid = @“ssid+:[^\s]“;;
  NSPredicate ssidPre = [NSPredicate predicateWithFormat:@“SELF MATCHES %@“,ssid];
  NSString dataStr = symbol.data ;
  NSLog(@“ssidPre %@“, ssidPre);
  NSLog(@“predicate %@“, predicate);
  NSLog(@“dataStr %@“, dataStr);

  [self performSelector:@selector(disposeViewControl) withObject:FALSE afterDelay:5.0];
  }

/*
关闭页面
*/
-(void)disposeViewControl
{

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[NSObject cancelPreviousPerformRequestsWithTarget:self selector: @selector (disposeViewControl) object:nil]; [self dismissViewControllerAnimated:YES                        completion:^( void )                        {                            NSLog(@ "消失～～ " );                         }];

}

• (void)setOverlayPickerView:(ZBarReaderViewController *)reader
  {

  //清除所有内容
  for (UIView *temp in [reader.view subviews])
  {

  ?

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  for (UIButton *button in [temp subviews]) {      if ([button isKindOfClass:[UIButton class ]])      {          [button removeFromSuperview];      } }   for (UIToolbar *toolbar in [temp subviews]) {      if ([toolbar isKindOfClass:[UIToolbar class ]])      {          [toolbar setHidden:YES];          [toolbar removeFromSuperview];      } }

  }
  //TITLE_HEIGHT ： 64 头部高度
  tmpHeight = appDelegate.mainRootView.getRootHeight - 3TITLE_HEIGHT;
  tmpWidth = appDelegate.mainRootView.getRootWidth - 30;
  //最上部view
  UIView upView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, appDelegate.mainRootView.getRootWidth, TITLE_HEIGHT)];
  upView.alpha = 0.4;
  upView.backgroundColor = [UIColor blackColor];
  [reader.view addSubview:upView];

  //左侧的view
  UIView *leftView = [[UIView alloc] initWithFrame:CGRectMake(0, TITLE_HEIGHT, 15, tmpHeight)];
  leftView.alpha = 0.4;
  leftView.backgroundColor = [UIColor blackColor];
  [reader.view addSubview:leftView];

  //右侧的view
  UIView *rightView = [[UIView alloc] initWithFrame:CGRectMake(appDelegate.mainRootView.getRootWidth - 15, TITLE_HEIGHT, 15, tmpHeight)];
  rightView.alpha = 0.4;
  rightView.backgroundColor = [UIColor blackColor];
  [reader.view addSubview:rightView];

  //底部view
  UIView * downView = [[UIView alloc] initWithFrame:CGRectMake(0, tmpHeight + TITLE_HEIGHT, appDelegate.mainRootView.getRootWidth, 2*TITLE_HEIGHT)];
  downView.alpha = 0.4;
  downView.backgroundColor = [UIColor blackColor];
  [reader.view addSubview:downView];

  //最上层的操作 左边
  UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
  button.frame = CGRectMake(15, 24, 30, 30);
  [button setBackgroundImage:[UIImage imageNamed:@“ocrBack”] forState:UIControlStateNormal];
  [button addTarget:self action:@selector(leftClick:) forControlEvents:UIControlEventTouchUpInside];
  [reader.view addSubview:button];

  //右边
  UIButton * buttonRight = [UIButton buttonWithType:UIButtonTypeCustom];
  buttonRight.frame= CGRectMake(appDelegate.mainRootView.getRootWidth - 45, 24, 30, 30);
  [buttonRight setBackgroundImage:[UIImage imageNamed:@“ocr_flash_off”] forState:UIControlStateNormal];
  [buttonRight addTarget:self action:@selector(rightClick:) forControlEvents:UIControlEventTouchUpInside];
  [reader.view addSubview:buttonRight];

  //用于说明的label
  UILabel * labIntroudction= [[UILabel alloc] init];
  labIntroudction.backgroundColor = [UIColor clearColor];
  labIntroudction.frame=CGRectMake(0, 20, downView.frame.size.width, 50);
  labIntroudction.numberOfLines=2;
  labIntroudction.textColor=[UIColor whiteColor];
  labIntroudction.textAlignment = NSTextAlignmentCenter;
  labIntroudction.text=@“将二维码/条形码放入扫描框内\n自动识别不安全连接，请放心扫描”;
  [downView addSubview:labIntroudction];

  //4个角
  //左上
  UIImageView *leftUp=[[UIImageView alloc] initWithFrame:CGRectMake(13, TITLE_HEIGHT-2, 19, 19)];
  [leftUp setImage:[UIImage imageNamed:@“scan_1”]];
  [reader.view addSubview:leftUp];

  //右上
  UIImageView rightUp=[[UIImageView alloc] initWithFrame:CGRectMake(appDelegate.mainRootView.getRootWidth-13-19, TITLE_HEIGHT-2, 19, 19)];
  [rightUp setImage:[UIImage imageNamed:@“scan_2”]];
  [reader.view addSubview:rightUp];
  //左下
  UIImageView leftDown=[[UIImageView alloc] initWithFrame:CGRectMake(13, TITLE_HEIGHT+tmpHeight-15, 19, 19)];
  [leftDown setImage:[UIImage imageNamed:@“scan_3”]];
  [reader.view addSubview:leftDown];
  //右下
  UIImageView *rightDown=[[UIImageView alloc] initWithFrame:CGRectMake(appDelegate.mainRootView.getRootWidth-13-19, TITLE_HEIGHT+tmpHeight-15, 19, 19)];
  [rightDown setImage:[UIImage imageNamed:@“scan_4”]];
  [reader.view addSubview:rightDown];

  //滑动
  num =0;
  UIImage *image =[UIImage imageNamed:@“scan_net”];
  NSLog(@“image %f”, image.size.height);
  NSLog(@“image %f”, image.size.width);
  startY= TITLE_HEIGHT;
  scanNet = [[UIImageView alloc] initWithFrame:CGRectMake(15, startY, tmpWidth, tmpHeight)];
  scanNet.image = image;
  [reader.view addSubview:scanNet];
  // scanNet.layer.borderColor = [UIColor redColor].CGColor;
  // scanNet.layer.borderWidth = 1.0f;
  timer = [NSTimer scheduledTimerWithTimeInterval:.02 target:self selector:@selector(animation1) userInfo:nil repeats:YES];

}
-(void)animation1
{

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num ++; scanNet.frame = CGRectMake(scanNet.frame.origin.x, startY, scanNet.frame.size.width, 2 *num); if ( 2 *num == tmpHeight) {     num = 0 ; }

}

-(void) leftClick:(id)sender
{

?

1	[self disposeViewControl];

}

-(void) rightClick:(id)sender
{

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UIButton *btn = (UIButton *)sender; if (btn.selected) {      btn.selected = NO;      self.zBarReaderView.readerView.torchMode = 0 ; } else {      btn.selected = YES;      self.zBarReaderView.readerView.torchMode = 1 ; }

}

转载地址：http://my.oschina.net/coper/blog/298438

ZBarReaderView使用：

ZBar为我们提供了两种使用方式，一种是直接调用ZBar提供的ZBarReaderViewController打开一个扫描界面，另一种方式是使用ZBar提供的可以嵌在其他视图中的ZBarReaderView，实际项目中我们更可能会使用第二种方式，这可以让我们对界面做更多的定制。

ZBar使用起来也非常简单，将ZBarSDK导入项目，在需要使用ZBar的文件中导入ZBarSDK.h头文件即可，以下是ZBarReaderView的初始化方法：

ZBarReaderViewreaderView  =  [[ZBarReaderViewalloc]init];
readerView.frame  =  CGRectMake(0,  44,self.view.frame.size.width,self.view.frame.size.height  -  44);
readerView.readerDelegate  =  self;
//关闭闪光灯
readerView.torchMode  =  0;
//扫描区域
CGRectscanMaskRect  =  CGRectMake(60,CGRectGetMidY(readerView.frame)  -  126,  200,  200);
     
//处理模拟器
if  (TARGET_IPHONE_SIMULATOR)  {
    ZBarCameraSimulator  *cameraSimulator 
          =  [[ZBarCameraSimulatoralloc]initWithViewController:self];
    cameraSimulator.readerView  =  readerView;
}
[self.view addSubview:readerView];
//扫描区域计算
readerView.scanCrop  =  [selfgetScanCrop:scanMaskRectreaderViewBounds:self.readerView.bounds];

[readerView start];

以上代码需要说明的有以下几点：

1. 闪光灯设置
   我不希望在扫描二维码时开启闪光灯，所以将ZBarReaderView的torchMode设为0，你可以将它设置为其他任何合适的值。
2. 扫描区域计算
   这点比较重要，我们常用的二维码扫描软件的有效扫描区域一般都是中央区域，其他部分是不进行扫描的，ZBar可以通过ZBarReaderView的scanCrop属性设置扫描区域，它的默认值是CGRect(0,0, 1,1),表示整个ZBarReaderView区域都是有效的扫描区域。我们需要把扫描区域坐标计算为对应的百度分数坐标，也就是以上代码中调用的getScanCrop:readerViewBounds方法，亲测没有问题，如下所示:

 

-(CGRect)getScanCrop:(CGRect)rectreaderViewBounds:(CGRect)readerViewBounds
{
    CGFloatx,y,width,height;
     
    x  =  rect.origin.x  /  readerViewBounds.size.width;
    y  =  rect.origin.y  /  readerViewBounds.size.height;
    width  =  rect.size.width  /  readerViewBounds.size.width;
    height  =  rect.size.height  /  readerViewBounds.size.height;
     
      return  CGRectMake(x,y, width, height);
}

PS：在网上找到很多这个方法都是将横坐标和纵坐标交叉，这样是有问题的，仔细想一下就会明白。

初始化部分完成之后，就可以调用ZBarReaderView的start方法开始扫描了，需要让你的类实现ZBarReaderViewDelegate协议，在扫描到二维码时会调用delegate的对应方法。最后，当二维码已经识别时候，可以调用ZBarReaderView的stop方法停止扫描。如下所示:

-  (void)readerView:(ZBarReaderView  *)readerViewdidReadSymbols:(ZBarSymbolSet  *)symbolsfromImage:(UIImage  *)image
{
      for  (ZBarSymbol  *symbol  in  symbols)  {
        NSLog(@"%@", symbol.data);
          break;
      }
     
      [self.readerView stop];
}

转载地址： http://blog.sina.com.cn/s/blog_b8e976830101cpr7.html