学步园

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/