I found a cheat for MINECRAFT to change creative to survival:

-First, make two worlds, one survival and one creative

-Second, open files >com.mojang >minecraftworld >open the survival and search for level.dat, move it  to the creative world file.
-For making survival to creative, do the opposite

- Taaaa...daaaa.....its all done

I'll make a tutorial video next time, just wait and be patient