[提问]关于emit的疑问 [复制链接]

我向一个子窗口发送信号：
    emit readConfigSignal();    
    expInfo_dlg->exec();
这种方式可以奏效；但是
expInfo_dlg->exec();
emit readConfigSignal();
这样就不行了，为什么啊

int QDialog::exec () [slot]
Shows the dialog as a modal dialog, blocking until the user closes it. The function returns a DialogCode result.
If the dialog is application modal, users cannot interact with any other window in the same application until they close the dialog. If the dialog is window modal, only interaction with the parent window is blocked while the dialog is open. By default, the dialog is application modal.
也就是说，你下面的那个emit要等关闭了这个dialog才有效

信息太少，什么都看不出来。

应该是exec()执行后阻塞，后面的代码除非从这个函数跳出，否则不会执行到的