Upgrade Xcode to 7.3.1 today and find the plugin invalid after installation ...
Reason: Apple requires the addition of a UUID certificate to ensure the stability of the plugin.
Workaround:
1. View Xcode's UUID
Enter the following command at the terminal:
Defaults Read/applications/xcode.app/contents/info Dvtplugincompatibilityuuid
Copy Xcode's UUID
2. Open the directory where the Xcode plugin is located:
~/library/application Support/developer/shared/xcode/plug-ins
3. Select the installed plug-in, such as Vvdocumenter-xcode, right-click "Show Package Contents";
4. Locate the Info.plist file, locate the Dvtplugincompatibilityuuids project, add a Item,value value for the previous Xcode UUID, save, and then restart Xcode
After Xcode 6, restart Xcode will prompt "load bundle", "Skip bundle", here must choose "Load Bundle", or plug-in can not be used.
If the prompt does not appear:
To exit Xcode, the terminal executes the following command:
Defaults Delete com.apple.dt.Xcode dvtpluginmanagernonappleplugins-xcode-7.3. 1
PS: Finally, the version number of Xcode.
After you restart Xcode, you will see the above dialog box, select "Load bundles" and then solve the problem!
Original link: http://blog.csdn.net/jkwmscq/article/details/49428251
"IOS" Xcode plugin is not valid after installation