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Upward = PopupMenu->addAction(QIcon(":/res/upward"), tr("向上移动"));
Upward->setShortcut(tr("Ctrl+Up"));
connect(Upward, SIGNAL(triggered(bool)), this, SLOT(on_Upward()));
Downward = PopupMenu->addAction(QIcon(":/res/downward"), tr("向下移动"));
Downward->setShortcut(tr("Ctrl+Down"));
connect(Downward, SIGNAL(triggered(bool)), this, SLOT(on_Downward()));
connect(Downward, SIGNAL(triggered(bool)), this, SLOT(on_Downward()));
你这里的signal和slots用法就不对了
建议看看相应的注意事项.....