How can we get useful coverage for specific file

[ZachEvan]

According to your method, I got a single file coverage data, your code show as below:
$ xcrun xccov view --file ~/Desktop/XCCov-Demo/XCCov-Demo/AppDelegate.swift Build/Logs/Test/*.xccovarchive/

But I can't use the coverage data, how can I get specific file coverage data as the below picture shows?

Look forward to your help! Thanks!