I was wondering if Xcode 5 is providing a setting to automatically count up the Build number found under General in the Identity section of the project navigator.
But afaik you still have to do it with scripting, using PlistBuddy.
One simple solution is to increase the build number in Xcode 5 is posted below:
Go to Editor -> Add Build Phase -> Add Run Script Build Phase
Go to Build Phases in the project navigator and edit Run Sript. Change Shell to /bin/bash and paste the following script:
#!/bin/bash
buildNumber=$(/usr/libexec/PlistBuddy -c "Print CFBundleVersion" "$INFOPLIST_FILE")
buildNumber=$(($buildNumber + 1))
/usr/libexec/PlistBuddy -c "Set :CFBundleVersion $buildNumber" "$INFOPLIST_FILE"
Don't forget to change the Build number found under General in the Identity section from 1.0 to 1
Have fun! :)