There are two ways to add plug-ins. Recommend the second kind
One is to find the plugin you want to install on GitHub, and then after Xcode completely exits, open the plug-in you want to install, compile it, and then completely exit, re-open Xcode, will come out this diagram
Click Load bunble, which is said to install a third-party plugin, be sure to load do not skip.
Then you want to install the plug-in, (how to see if the installation is successful, one is to test it, there is a folder to see if there is a plugin on the line)
Second, this method installs a specialized to manage the third party plug-in tool, the name is called the Alcatraz, the installation process is carries on the command line
Installation: Curl-fssl https://raw.github.com/supermarin/Alcatraz/master/Scripts/install.sh | Sh
It looks like the installation, you need to start Xcode, when you install the success, prompted to restart Xcode, you will restart Xcode, will find
There is a package manager, this is to be able to manage the plug-in, there are cocoapod, so it does not seem to be in the command line cocoapod trouble to install, a plug-in is done, of course, there are other commonly used plugins, slowly use it
Using plugins in Xcode