iOS 二维码扫描 ZBarSDK

gitHub地址：https://github.com/bmorton/ZBarSDK

参考地址：

1、http://blog.csdn.NET/u010520912/article/details/22488143

2、http://www.th7.cn/program/iOS/201411/323619.shtml

3、http://www.th7.cn/Program/ios/201409/274076.shtml