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
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- (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
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// 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
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//

// 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：

[html] view
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- (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
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-(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
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- (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
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//

// 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