iOS之使用ZbarSDK实现扫描二维码以及条形码功能

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //your code
    [ZBarReaderView class];
    return YES;
}

#import <UIKit/UIKit.h>
#import "ZBarSDK.h"
@interface ScanViewController : UIViewController<ZBarReaderViewDelegate>
{
    ZBarReaderView *readerView;
    ZBarCameraSimulator *cameraSim;
}
@property (retain, nonatomic) IBOutlet ZBarReaderView *readerView;
@end

#import "ScanViewController.h"
@interface ScanViewController ()
@end
@implementation ScanViewController
@synthesize readerView;
- (void)viewDidLoad
{
    [super viewDidLoad];    
    //your code    
    readerView.readerDelegate = self;
    [readerView setAllowsPinchZoom:YES];
    if (TARGET_IPHONE_SIMULATOR) {
        cameraSim = [[ZBarCameraSimulator alloc] initWithViewController:self];
        cameraSim.readerView = readerView;
    }
}
-(void)viewDidAppear:(BOOL)animated
{
    [readerView start];
}
-(void)viewDidDisappear:(BOOL)animated
{
    [readerView stop];
}

-(void) readerView:(ZBarReaderView *)readerView didReadSymbols:(ZBarSymbolSet *)symbols fromImage:(UIImage *)image
{
    NSString *codeData = [[NSString alloc] init];;
    for (ZBarSymbol *sym in symbols) {
        codeData = sym.data;
        break;
    }
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"掃描結果" message:codeData delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
    [alert show];
}

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    // 得到条形码结果
    id<NSFastEnumeration> results =
    [info objectForKey: ZBarReaderControllerResults];
    ZBarSymbol *symbol = nil;
    for(symbol in results)
        break;
    //获得到条形码
    //NSString *dataNum=symbol.data;
    //扫描界面退出
    [picker dismissModalViewControllerAnimated: YES];
}