Done:
touchStarted:每次手指落下时,重置当前笔的记录
touchMoved:在修改格子之前,把格子的旧值存入 currentStroke(每个格子只记录一次)
touchEnded:手指抬起时,把这一笔的 diff 推入 history 栈
undo():从栈顶弹出上一笔,逐格恢复旧值
Add interpretation function:
profile内容处理
Doing:
To-do in this week:
Calculate the score of the profile while setting up the database