QAction中的triggered方法的使用!

[weixin_38056418]

assistant中是这样定义的void QAction::triggered ( bool checked = false )  [signal]This signal is emitted when an action is activated by the user; for example, when the user clicks a menu option, toolbar button, or presses an action's shortcut key combination, or when trigger() was called. Notably, it is not emitted when setChecked() or toggle() is called.connect(qaction, SIGNAL(triggered()), this, SLOT(open()));可以使用,但是connect(qaction, SIGNAL(triggered(false)), this, SLOT(open()));就不行了,定义中的参数是默认参数false,为什么加false就不可以了呢?拜托了!