使用 iPad 2 前置摄像头扫描条形码的库？
哪些库可用于使用 iPad 2 前置摄像头（而不是后置摄像头）扫描条形码？
在最好的情况下，该库具有图像处理功能，以弥补自动对焦的缺失。
相关：您建议使用哪种条形码以获得最佳识别率（对于大约 8 位数字的 ID）？
Which libraries are available for scanning barcodes with the iPad 2 front camera - not the back camera?
The library in the best case features image processing functionality to make up for the missing autofocus.
Related: Which barcode would you suggest for best recognition rate (for an ID with about 8 digits)?
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ZXing 中的
objc目录具有与接口连接的 Objective C 包装类ZXing C++ 端口并提供相机选择。 objc 类的文档不多，但有一个 示例 macruby应用程序可以作为指南。ZXing C++ 端口在 QR 码上最可靠。有一维代码支持，但使用不多。如果您打算使用定焦相机读取，则读取二维码通常比读取一维码更可靠。
The
objcdirectory in ZXing has Objective C wrapper classes that interface to the ZXing C++ port and provide for camera selection. There's not much in the way of documentation for theobjcclasses but there is a sample macruby app that may work as a guide.The ZXing C++ port is most reliable on QR codes. There is 1D code support, but it's not heavily used. If you're going to be reading with a fixed-focus camera, QR codes are generally much more reliably read than 1D codes.