ti-nspire cas的lua问题

lazydog

如何写代码，让按下键盘的left时显示helloworld?

wtof1996

1. str = "";
   
2. function on.paint(gc)
   
3.     gc:drawString(str, 50, 50);
   
4. end
   
5. 
   
6. function on.arrowLeft()
   
7.     str = "Hello World";
   
8.     platform.window:invalidate();
   
9. end

复制代码

回去好好看看API手册第八章吧