20 Replies
      Latest reply on Mar 24, 2017 8:28 PM by joshua_hii_zhen_hua
      joshua_hii_zhen_hua Level 1 Level 1 (0 points)

        I have two files. I build a void in one of the files and I want two files to share this void. Can I use the keyword extern? If yes, how to write? If no, what can I do? I am using Objective C.Please help me.Thank you.