PyQt5

Question

我正在尝试在 QMainWindow 中显示图片 class:

from PyQt5.QtWidgets import QLabel, QMainWindow, QApplication
from PyQt5.QtGui import QPixmap
import sys


class Menu(QMainWindow):

    def __init__(self):
        super().__init__()
        self.setWindowTitle("Title")
        label = QLabel(self)
        pixmap = QPixmap('capture.png')
        label.setPixmap(pixmap)
        self.resize(pixmap.width(), pixmap.height())
        self.show()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = Menu()
    sys.exit(app.exec_())

但它不显示图像，只是打开window。我坚持 QMainWindow class 因为我正在尝试编写类似绘画应用程序的东西，所以我将能够编写菜单，并且能够在图片.

如有任何建议，我们将不胜感激。

谢谢。

Answer 1

QMainWindow.setCentralWidget(widget)

Sets the given widget to be the main window’s central widget.

from PyQt5.QtWidgets import QLabel, QMainWindow, QApplication, QWidget, QVBoxLayout
from PyQt5.QtGui import QPixmap
import sys


class Menu(QMainWindow):

    def __init__(self):
        super().__init__()
        self.setWindowTitle("Title")
        
        self.central_widget = QWidget()               
        self.setCentralWidget(self.central_widget)    
        lay = QVBoxLayout(self.central_widget)
        
        label = QLabel(self)
        pixmap = QPixmap('logo.png')
        label.setPixmap(pixmap)
        self.resize(pixmap.width(), pixmap.height())
        
        lay.addWidget(label)
        self.show()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = Menu()
    sys.exit(app.exec_())

PyQt5 - 如何在 QMainWindow class 中显示图像？

PyQt5 - How to display image in QMainWindow class?

python

python-3.x

qt

qmainwindow