EventType.KeyDown 键按下
Description描述
A keyboard key was pressed.
一个键盘键被按下。
Use Event.character to find out what has been typed. Use Event.keyCode to handle arrow, home/end or other function keys, or to find out which physical key has been pressed. This event is sent repeatedly depending on the end user's keyboard repeat settings.
使用Event.character查找出是什么类型的。使用Event.keyCode来控制箭头。home/end或其他函数键，或查找出哪一个物理键被按下。这个事件是重复发送，根据终端用户的键盘重复设置。
Note that key presses can come as separate events, one with valid Event.keyCode, and another with valid Event.character. In case of keyboard layouts with dead keys, multiple Event.keyCode events can generate a single Event.character event.
请注意，按键可以来作为单独的事件，一个具有有效的Event.keyCode，和另一个具有有效的Event.character。在键盘布局有死键的情况下，多重 Event.keyCode事件可以生成一个单独的Event.character事件。