运用ZBar来读取条形码和二维码的方法

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

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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

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5.在appDelegate文件中加入 标记部分的代码

- (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;}

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

////  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：

- (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

-(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

- (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。

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.m文件所有内容是：

////  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?

ZBarReaderView *readerView;

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