最近项目中要用到VoIP，VoIP全称Voice over Internet Protocol，即网络电话，生活中经常用到，例如Skype。
能用到iPhone上面的VoIP库不多，最开始准备使用Lipphone，但其编译实在太慢，编译了N次也没有成功，最后放弃啦。后来尝试使用pjsip，居然成功了，简单的记录一下过程，其实是照着官网操作的:)
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steipete-PSStackedView-1dcbed1 .gitignore Example LICENSE PSStackedView.podspec PSStackedView README.md
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