如何在主函数中显示这两个界面:class Faceshow(QMainWindow, Ui_MainWindow): def __init__(self, parent=None): super(Faceshow, self).__init__(parent) self.setupUi(self) self.main_button.clicked.connect(start) self.main_exit.clicked.connect(self.quit) def quit(self): self.close() class RESUshow(QWidget, Ui_Form): def __int__(self, parent=None): super(RESUshow, self).__init__(parent) self.setupUi(self) img1, img2, text1, text2 = start() pixmap1 = QPixmap.fromImage(img1) pixmap2 = QPixmap.fromImage(img2) self.label_img1.setPixmap(pixmap1) self.label_img2.setPixmap(pixmap2) self.label_psnr.setText(text1) self.label_ssim.setText(text2)

在主函数中，你需要创建两个对象，一个是`Faceshow`，另一个是`RESUshow`。然后，当`Faceshow`的`main_button`被点击时，调用`start`函数并显示`RESUshow`界面。

以下是示例代码：

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.QtGui import QPixmap
from faceshow import Faceshow
from resushow import RESUshow

def start():
    # your code here
    return img1, img2, text1, text2

class Main(QMainWindow):
    def __init__(self):
        super(Main, self).__init__()
        self.faceshow = Faceshow()
        self.resushow = RESUshow()
        self.faceshow.main_button.clicked.connect(self.show_resushow)
        self.faceshow.main_exit.clicked.connect(self.quit)
    
    def show_resushow(self):
        img1, img2, text1, text2 = start()
        pixmap1 = QPixmap.fromImage(img1)
        pixmap2 = QPixmap.fromImage(img2)
        self.resushow.label_img1.setPixmap(pixmap1)
        self.resushow.label_img2.setPixmap(pixmap2)
        self.resushow.label_psnr.setText(text1)
        self.resushow.label_ssim.setText(text2)
        self.resushow.show()
    
    def quit(self):
        self.close()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    main = Main()
    main.faceshow.show()
    sys.exit(app.exec_())

在这个例子中，`Main`类继承自`QMainWindow`，并包含了两个对象：`Faceshow`和`RESUshow`。在`show_resushow`函数中，我们调用`start`函数并将结果显示在`RESUshow`界面中。

在`if __name__ == '__main__':`中，我们创建了`QApplication`对象和`Main`对象，并显示`Faceshow`界面。最后，我们调用`sys.exit(app.exec_())`来保证程序正常退出。