sudo gem install -n /usr/local/bin update_xcode_plugins
安装ClangFormat
git clone https://github.com/travisjeffery/ClangFormat-Xcode.git .安装Alcatraz
git clone https://github.com/alcatraz/Alcatraz.git .安装VVDocumenter
git clone https://github.com/onevcat/VVDocumenter-Xcode.git .