QT close 没有调用析构？

2020-12-23 01:51:50 3.5k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

设置Qt::Tool窗体类型时，关闭在其中显示的最后窗口自动析构此窗口问题问题描述：在一个QWidget窗口类中设置其为工具窗口(Qt::Tool)。在它之中显示其他窗口，当关闭这些窗口的最后一个时，会自动析构此窗口。 #include "test.h" test::test(QWidget *parent) : QWidget(parent) { setWindowFlags(Qt::Tool); QPixmap image(":/headportrait/head.jpg"); ChatFriend *chat = new ChatFriend 阅读详情



Login::Login(QWidget *parent)

    : QMainWindow(parent)

    , ui(new Ui::Login)

{

    ui->setupUi(this);

。。。

}

Login::~Login()

{

    qDebug()<< "inner destrucor...";

    delete ui;



}

Login::Jump123(){

//Mainpage *mp = new... // 另一个界面

//mp.show(); // 大概这意思

this->close();

qDebug()<< "inner Jump...";

}

运行后，页面跳转问题的，但是没有进入login的析构函数，只有关掉窗口才能调用，那close与hide有啥区别，甚至用了this->destory();同样没有销毁
另外，这个close还是QWidget的一个槽，页面跳转，怎么销毁当前页面，做到真正的跳转？
[slot] bool QWidget::close()
Closes this widget. Returns true if the widget was closed; otherwise returns false.
First it sends the widget a QCloseEvent. The widget is hidden if it accepts the close event. If it ignores the event, nothing happens. The default implementation of QWidget::closeEvent() accepts the close event.
If the widget has the Qt::WA_DeleteOnClose flag, the widget is also deleted. A close events is delivered to the widget no matter if the widget is visible or not.
The QApplication::lastWindowClosed() signal is emitted when the last visible primary window (i.e. window with no parent) with the Qt::WA_QuitOnClose attribute set is closed. By default this attribute is set for all widgets except transient windows such as splash screens, tool windows, and popup menus.

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