Converting ios objective-c to mac os swift

[thierryH91200]

It is not always easy to write a program in swift, while the examples
are in objective-c
May be that there will be fewer questions

clean the code
add copyright

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@1ed1561). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #2306   +/-   ##
=========================================
  Coverage          ?   18.58%           
=========================================
  Files             ?      124           
  Lines             ?    14508           
  Branches          ?        0           
=========================================
  Hits              ?     2696           
  Misses            ?    11812           
  Partials          ?        0

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1ed1561...3c5f431. Read the comment docs.

[liuxuan30]

nice job 👍

[liuxuan30]

Due to travis update, this xcodeproj has conflict

[pmairoldi]

Was gonna fix the conflicts and merge this in but your branch does not exist anymore. Closing.