[Qt] QProcess::startDetached() 避免弹窗，或者窗口一闪而过

主动宣告 setProcessState(QProcess::NotRunning)   或者在堆上new一个QProcess。     出处：  https://stackoverflow.com/questions/33874243/qprocessstartdetached-but-hide-console-window I had exactly the same problem, and

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