循环剪贴板和错误级别评估无法正常工作 [英] Looping clipboard and errorlevel evaluation not working as expected

问题描述

while clipboard =
    {
        SendEvent, ^{ins}                                   ;^c doesn't work
        sleep 50
    }
    clipWait, 2                                     ; Wait for the clipboard to contain text.
    if ErrorLevel
    {
        ;endEvent, ^{ins}
        MsgBox Failed to save the selection: %clipboard%
        ;exit
    }

问题:ErrorLevel仍然被评估为true，而除非剪贴板中有东西，否则循环不会结束.这怎么可能? 澄清:进行此构造是为了尝试回答以下问题: SendEvent ^ {ins}是' t将内容复制到剪贴板 因此，是的，我知道循环剪贴板不是一种可靠的做法.但是除了采用这种结构，我别无选择.

Problem: ErrorLevel still gets evaluated as true, whereas the loop shouldn't finish unless something came inside the clipboard. How is this possible? Clarification: This construction was made as an attempt to answer question: SendEvent ^{ins} isn't copying content to the clipboard As such, yes I am aware that looping the clipboard is not regarded as a reliable practice. But I have no other alternative than employing such a construction.

推荐答案

虽然循环需要表达式，但clipboard =不是表达式.试试这个:

While loops expect expressions, clipboard = is no expression. Try this one:

clipboard := ""
while( StrLen(clipboard) < 1 )
{
    Send, ^{ins}
    Sleep, 50
}
MsgBox % ClipBoard

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