excel - Excel VBA倒数计时器-代码崩溃的Excel

Question

有人能提供一个为什么这会导致我的excel崩溃的见解，我似乎无法解决。
我正在尝试学习VBA，需要一些建议。

sub timer()

    dim second

    second = 1.15740740740741e-05 

'this is the amount excel counts as a second

line1:

    application.wait "00:00:01"

    Range("a1").value = Range("a1").value - second

    if not range("D2").value = 0 then

        Goto line1

            else

            Msgbox("Countdown ended")

    End if

end sub

Answer 1

我确定您没有安排航天飞机的发射时间或任何关键的时间。但是，如果要确保倒计时不超过30秒，可以使用计时器功能。这是一个例子。

Sub NewTimer()

    Dim Start As Single
    Dim Cell As Range
    Dim CountDown As Date

    'Timer is the number of seconds since midnight.
    'Store timer at this point in a variable
    Start = Timer

    'Store A1 in a variable to make it easier to refer
    'to it later. Also, if the cell changes, you only
    'have to change it in one place
    Set Cell = Sheet1.Range("A1")

    'This is the starting value. Timeserial is a good
    'way to get a time
    CountDown = TimeSerial(0, 0, 30)

    'Set our cell to the starting value
    Cell.Value = CountDown

    'Keep executing this loop until A1 hits zero or
    'even falls slightly below zero
    Do While Cell.Value > 0
        'Update the cell. Timer - Start is the number of seconds
        'that have elapsed since we set Start.
        Cell.Value = CountDown - TimeSerial(0, 0, Timer - Start)

        'DoEvents release control ever so briefly to Windows. This
        'allows Windows to do stuff like update the screen. When you
        'have loops like this, your code appears frozen because it's
        'not letting Windows do anything (unless you have this line)
        DoEvents
    Loop

End Sub