With this action you can poll the gamepad to see if any button is currently being pressed. The action will return true every step that the gamepad button is being pressed (and held) down, or false otherwise, although if you click the not modifier you can then check to see if the button is not being pressed, ie: the action will return true while no button is pressed and false if there is. If you only need to check for a single button press then use the action if gamepad button down.
注意：如果要将动作添加进 "if" 动作块，它们应该被放置到动作的一边，如下图所示：
参数 描述 游戏手柄 The gamepad index. 按钮 The name of the button to check. 非 否定选项（true变为false，反之亦然)
The above action block code polls the button state of gamepad 0 every step and if a button is being held down it checks for the initial button down press. If the check is true on the initial down press, a sound is played, then, while the button is held down, the sprite blending is changed to red. If the button is not being held down, a check is done on the button release to reset the blending colour to white.