ZBar QRcode implemention

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 plaincopy

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. // force view class to load so it may be referenced directly from NIB
9. [ZBarReaderView class];
10. return YES;
11. }

注意此代码：

[cpp] view plaincopy

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. #import <UIKit/UIKit.h>
9. #import "ZBarSDK.h"
10. @interface ViewController : UIViewController<ZBarReaderViewDelegate>
11. {
12. IBOutlet UILabel  * label ;
13. ZBarReaderView *readerView;
14. ZBarCameraSimulator *cameraSim;
15. }
16. @property(nonatomic,retain) UILabel * label ;
17. @property (nonatomic, retain) IBOutlet ZBarReaderView *readerView;
18. @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

[html] view plaincopy

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

[html] view plaincopy

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

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

//  ViewController.m

//  QRCode

//

//  Created by 殷婷婷 on 15-8-1.

//  Copyright (c) 2015年 manluotuo. All rights reserved.

//

#import "ViewController.h"

#import "ZBarSDK.h"

@interface ViewController ()<ZBarReaderViewDelegate>

@property(nonatomic,strong)ZBarReaderView *readerView;

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

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

ZBarReaderView *readerView = [[ZBarReaderView alloc]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

CGRect scanMaskRect = CGRectMake(60, CGRectGetMidY(readerView.frame) - 126, 200, 200);

//处理模拟器

if (TARGET_IPHONE_SIMULATOR) {

ZBarCameraSimulator *cameraSimulator

= [[ZBarCameraSimulator alloc]initWithViewController:self];

cameraSimulator.readerView = readerView;

}

[self.view addSubview:readerView];

self.readerView = readerView;

//扫描区域计算

readerView.scanCrop = [self getScanCrop:scanMaskRect readerViewBounds:self.readerView.bounds];

[readerView start];

}

-(CGRect)getScanCrop:(CGRect)rect readerViewBounds:(CGRect)readerViewBounds

{

CGFloat x,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);

}

- (void)readerView:(ZBarReaderView *)readerView didReadSymbols:(ZBarSymbolSet *)symbols fromImage:(UIImage *)image

{

for (ZBarSymbol *symbol in symbols) {

NSLog(@"%@", symbol.data);

break;

}

[self.readerView stop];

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end