QT QCustomPlot parent

问题

I have a QCustomPlot widget in my ui as follows:

ui->plot_widget

also I have another QCustomPlot object in my cpp file as follows:

QCustomPlot *plot=new QCustomPlot();

I want to add plot data into ui->plot_widget data. If I use ui->plot_widget=plot the widget parent of ui->plot_widget will be destroyed and my ui does not update ui->plot_widget.

How can I add plot data into ui->plot_widget data?

来源：https://stackoverflow.com/questions/48345789/qt-qcustomplot-parent