在 PyQt 加载 UI 三种常见方法

from PyQt5 import QtWidgets, uic
class MyWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()
        # 加载 UI 文件
        uic.loadUi('your_ui_file.ui', self)  # 第二个参数 self 表示将控件加载到当前窗口
app = QtWidgets.QApplication([])
window = MyWindow()
window.show()
app.exec_()

pyuic5 your_ui_file.ui -o ui_yourfile.py

from PyQt5 import QtWidgets
from ui_yourfile import Ui_MainWindow  # 假设你的主窗口类名为 Ui_MainWindow
class MyWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()
        # 设置 UI
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
app = QtWidgets.QApplication([])
window = MyWindow()
window.show()
app.exec_()

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5 import uic
# 加载UI文件
Ui_MainWindow, QtBaseClass = uic.loadUiType('your_ui_file.ui')
class MyApplication(QMainWindow, Ui_MainWindow):
    def __init__(self):
        super(MyApplication, self).__init__()
        self.setupUi(self)  # 初始化UI
app = QApplication(sys.argv)
window = MyApplication()
window.show()
sys.exit(app.exec_())

class MyWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()
        uic.loadUi('your_ui_file.ui', self)
        # 连接信号槽
        self.pushButton.clicked.connect(self.on_button_click)
    def on_button_click(self):
        print("Button clicked!")