qt 防止应用重复启动

QApplication a(argc, argv);
QSharedMemory singleton(a.applicationName());
if(!singleton.create(1))
{
QMessageBox::warning(NULL, "Waring", "Program already running!");
return false;
}
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作者：whatnamecaniuse
来源：CSDN
原文：https://blog.csdn.net/whatnamecaniuse/article/details/80563146
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转载于:https://www.cnblogs.com/nanqiang/p/10974422.html