使用ZbarSDK实现扫描二维码以及条形码功能（iOS）

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    self.title = @"二维码扫描";
    
    UIImageView * imageView = [[UIImageView alloc] init];
    [imageView setFrame:CGRectMake(300, 162, 424, 424)];
    [self.view addSubview:imageView];
    self.resultImage = imageView;
    
    [self scan];
}

- (void)scan
{
　　// 
    ZBarReaderViewController * reader = [[ZBarReaderViewController alloc] init];
    reader.readerDelegate = self;
    reader.supportedOrientationsMask = ZBarOrientationMaskAll;
    
    ZBarImageScanner * scanner = reader.scanner;
    [scanner setSymbology:ZBAR_I25 config:ZBAR_CFG_ENABLE to:0];
    
    [self presentViewController:reader animated:YES completion:nil];
}

- (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;
    }

　　　　// 打印条形码

    self.resultImage.image = [info objectForKey:UIImagePickerControllerOriginalImage];
    
    [picker dismissViewControllerAnimated:YES completion:nil];
    

　　　　// 退出扫描界面

    MyLog(@"result:%@", symbol.data);
}