KeyboardReleased()

语法

Result = KeyboardReleased(KeyID)
概要
Checks if the specified key has been pushed and released. This function is useful for switch key checks, like a 'Pause' key in a game (one time the game is paused, next time it will continue). The function ExamineKeyboard() must be called before this function to update the keyboard state. The keyboard behavior can be changed with KeyboardMode().

参数

KeyID The identifier of the key to be checked. For a full list of available keys see KeyboardPushed().

返回值

Nonzero if the specified key has been pushed and released, zero otherwise.

示例

  If InitSprite() And InitKeyboard() And OpenScreen(800,600,16,"")
    Paused = #False
    Repeat
      FlipBuffers()

      If StartDrawing(ScreenOutput())

        ExamineKeyboard()
        If KeyboardReleased(#PB_Key_P)
          If Paused = #False
            Paused = #True
          Else
            Paused = #False
          EndIf
        EndIf

        DrawingMode(0)

        If Paused = #False
          DrawText(20, 20, "Program is running...")
        Else
          DrawText(20, 20, "Program paused...    ")
        EndIf

        StopDrawing()
      EndIf
    Until KeyboardPushed(#PB_Key_Escape)
  EndIf

参阅

ExamineKeyboard(), KeyboardPushed()

已支持操作系统

所有

<- KeyboardPushed() - Keyboard Index