直到Onkey {RIGHT}

Question

基本上我想循环以下操作，直到我按下{DOWN}，但私有Sub似乎不是100％正确，因此代码只是永远循环。

Public pressdown As Boolean

Sub DemoOnKey()
    Application.OnKey "{RIGHT}", "moveright"
    Application.OnKey "{LEFT}", "moveleft"
    Application.OnKey "{DOWN}", "movedown"
    Application.OnKey "{UP}", "moveup"

End Sub

Sub moveright()
  Do Until pressdown    
    Selection.Copy Destination:=Selection.Offset(0, 1)
    Selection.Offset(0, 1).Select
    Selection.Offset(0, -1).ClearContents

    DoEvents
  Loop

  If pressdown = True Then  
    Call movedown 'Calls similar macro to moveright, but to movedown, hehe  
  End If     
End Sub

Private Sub Form_KeyPress(Key As Integer)
  Const down = "{DOWN}"
  If Application.OnKey = down Then pressdown = True
End Sub

Answer 1

您不能在任何随机位置拥有Form_KeyPress(Key As Integer)。它是一个必须在用户表单中的事件处理程序。如果它在那里，你会得到一个编译时错误，因为你无法做If Application.OnKey = down，无论这意味着什么。你正在逃避它，因为这个子从未输入，因此永远不会被编译。

话虽如此，你的做法是错误的 有一个循环可以使蛇在设定的方向上移动，并且有四个关键处理程序可以改变这个设定方向。

另请注意，直接循环不是一种好方法，因为它会导致Excel按键操作中出现问题。我建议你使用OnTime作为主循环：

private move_where as string

Sub DemoOnKey()
    Application.OnKey "{RIGHT}", "moveright"
    Application.OnKey "{LEFT}", "moveleft"
    Application.OnKey "{DOWN}", "movedown"
    Application.OnKey "{UP}", "moveup"
End Sub

private Sub moveright()
  move_where = "right"
end sub
private Sub moveleft()
  move_where = "left"
end sub
private Sub movedown()
  move_where = "down"
end sub
private Sub moveup()
  move_where = "up"
end sub


Sub move()
    select case move_where
    case "right"
      ' Move right here
    case "left"
      ' Move left here
    case "down"
      ' Move down here
    case "up"
      ' Move up here
    end select

    Application.OnTime DateAdd("s", 1, Now), "move"
End Sub