Qt registered custom type

Register a custom type

When signals and slots pass custom parameters in different threads, they need to be registered. Otherwise, an error will be reported:
QObject::connect: Cannot queue arguments of type'QVector'
(Make sure'QVector' is registered using qRegisterMetaType().)

Registration format:

qRegisterMetaType<MyClass>("MyClass");

E.g:

#include "widget.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    qRegisterMetaType<QVector<int>>("QVector<int>");
    Widget w;
    w.show();
    return a.exec();
}

Source code: https://github.com/sunlianqi/qt/tree/master/registerMetaType .