1.新建Python项目

使用QtDesigner设计界面

使用PyUIC把设计的界面转换成py文件
编写业务代码和Ui文件结合起来
SetTextStyleMainWindow.py

import sys
from SetTextStyle import Ui_SetTextStyle
from PyQt5.QtWidgets import QMainWindow, QApplication, QCheckBox, QSpinBox
from PyQt5.QtGui import QPen, QPalette, QFont
from PyQt5.QtCore import Qt, pyqtSlot


class SetTextStyleMainWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.__ui = Ui_SetTextStyle()
        self.__ui.setupUi(self)
        self.setWindowModality(Qt.ApplicationModal)
        self.__ui.radioButtonRed.clicked.connect(self.slotBtnRed)
        self.__ui.radioButtonBlue.clicked.connect(self.slotBtnBlue)
        self.__ui.radioButtonGreen.clicked.connect(self.slotBtnGreen)
        self.__ui.checkBox.stateChanged.connect(self.slotItalicFont)
        self.__ui.spinBox.valueChanged.connect(self.slotFontSize)

    @pyqtSlot(bool)
    def slotBtnRed(self, checked):
        strText = self.__ui.textEdit.palette()
        strText.setColor(QPalette.Text, Qt.red)
        self.__ui.textEdit.setPalette(strText)

    @pyqtSlot(bool)
    def slotBtnBlue(self, checked):
        strText = self.__ui.textEdit.palette()
        strText.setColor(QPalette.Text, Qt.blue)
        self.__ui.textEdit.setPalette(strText)

    @pyqtSlot(bool)
    def slotBtnGreen(self, checked):
        strText = self.__ui.textEdit.palette()
        strText.setColor(QPalette.Text, Qt.green)
        self.__ui.textEdit.setPalette(strText)

    def slotItalicFont(self, checked):
        if checked == 0:
            b = False
        else:
            b = True
        self.__ui.textEdit.setFontItalic(b)

    @pyqtSlot(int)
    def slotFontSize(self, size):
        self.__ui.textEdit.setFontPointSize(size)

mainWindow = SetTextStyleMainWindow()
def getMainWindow():
    #mainWindow.setWindowModality(Qt.ApplicationModal)
    mainWindow.show()

'''
if __name__ == "__main__":
    app = QApplication(sys.argv)

    mainWindow = SetTextStyleMainWindow()
    mainWindow.show()

    sys.exit(app.exec_())
'''

2.编写C++

Py_Initialize();
	if (!Py_IsInitialized()) {
    
		return;
	}
	PyRun_SimpleString("import sys");
	PyRun_SimpleString("sys.argv = ['python.py']");
	PyRun_SimpleString("sys.path.append('./')");
	_moudel = PyImport_ImportModule("SetTextStyleMainWindow");
	if (_moudel == nullptr) {
    
		PyErr_PrintEx(0);
	} else {
    

		PyObject * pFunc = NULL;
		PyObject* pDict = NULL;
		PyObject* pClass = NULL;
		PyObject* pIns = NULL;

		pDict = PyModule_GetDict(_moudel);
		assert(pDict != NULL);

		pClass = PyDict_GetItemString(pDict, "getMainWindow");
		assert(pClass != NULL);

		pIns = PyObject_CallObject(pClass, nullptr);
		assert(pIns != NULL);
		
	}
	Py_Finalize();

注意：要把

#include "Python.h"

放到Cpp文件的第一行，否则编译就会出错！

要把SetTextStyleMainWindow.py放到可执行目录下

aaa