ios条形码扫描技术

iOS 应用里实现条形码扫描功能，有个免费开源的 SDK：ZBar（http://zbar.sourceforge.net/iphone/sdkdoc/install.html）下面是实现的效果：

利用条形码，可以简单的得到二维码的值。具体的实现过程如下:

1. 下载 ZBar 的 SDK
2. 创建工程，iphone.scanbar
3. 把下载的 ZBarSDK 添加到工程中
4. 添加 .framework 到工程中
   
   
5. 添加一个按钮，处理效果。

#pragma mark –
    #pragma mark onClickButton
    -(IBAction)onButton:(id)sender
    {
        ZBarReaderViewController *reader = [ZBarReaderViewController new];
        reader.readerDelegate = self;
        ZBarImageScanner *scanner = reader.scanner;
        [scanner setSymbology: ZBAR_I25
                       config: ZBAR_CFG_ENABLE
                           to: 0];
        [self presentModalViewController: reader
                                animated: YES];
        [reader release];
    }
    - (void) imagePickerController: (UIImagePickerController*) reader
    didFinishPickingMediaWithInfo: (NSDictionary*) info
    {
        id<NSFastEnumeration> results =
        [info objectForKey: ZBarReaderControllerResults];
        ZBarSymbol *symbol = nil;
        for(symbol in results)
            break;
            NSLog(@"===%@",symbol.data);
        resultText.text = symbol.data;
        resultImage.image =
        [info objectForKey: UIImagePickerControllerOriginalImage];
        [reader dismissModalViewControllerAnimated: YES];
    }

源代码：http://easymorse-iphone.googlecode.com/svn/trunk/iphone.scanbar/