QT 信号槽用法 实例

1.connect(ui->menu_2, SIGNAL(triggered(QAction*)), this, SLOT(ActionCollectOnceTrigger(QAction*)));

这个信号槽连接可以知道菜单点击的是哪个action

2.connect(ui->actionImport, SIGNAL(triggered()), this, SLOT(BatchImport()));

点击菜单中action 触发事件

3.connect(ui->tableWidget, SIGNAL(itemSelectionChanged()), this, SLOT(showSelectedListItem()));tableWidget某一记录被选择4.connect(ui->BatImport, SIGNAL(clicked()), this, SLOT(unknownMaterialImport()));点击触发事件5.connect(ui->tableWidget1->horizontalHeader(), SIGNAL(sectionClicked(int)), this, SLOT(mySort(int)));tableWidget表头选中触发函数6.connect(ui->tableWidget, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(rightClickAddLeftDown(QPoint)));右击tableWidget  某行 出现菜单栏