背景：
通过主窗口的按钮调用其对应的窗口，代码比较简单，直接看，不懂的欢迎留言；
一共两个代码：
ui_first.py ：实现的是主窗口
ui_second.py：实现的是子窗口
点击开始按钮调用子窗口，点击关闭退出窗口；
ui_first.py
import sysimport osfrom PyQt5.QtWidgets import QWidget, QApplication, QPushButton, QHBoxLayoutfrom .ui_sencond import UiMainTwofrom PyQt5.QtCore import Qtclass UiMain(QWidget):def __init__(self, parent=None):super(UiMain, self).__init__(parent)self.setWindowTitle('main_wsw')self.resize(400, 200)self.initUI()def initUI(self):layout = QHBoxLayout()self.start = QPushButton("开始")self.start.clicked.connect(self.action_b)layout.addWidget(self.start)self.end = QPushButton("结束")self.end.clicked.connect(self.close)layout.addWidget(self.end)layout.addStretch()self.setLayout(layout)def action_b(self):self.ui_2 = UiMainTwo()self.ui_2.show()if __name__ == '__main__':app = QApplication(sys.argv)main = UiMain()main.show()sys.exit(app.exec_())
ui_second.py
import sysimport osfrom PyQt5.QtWidgets import QWidget, QApplication, QPushButton, QMenu, \QSizePolicy, QVBoxLayout, QHBoxLayout, QLabelclass UiMainTwo(QWidget):def __init__(self, parent=None):super(UiMainTwo, self).__init__(parent)self.setWindowTitle('second_wsw')self.resize(300, 200)self.move(800, 400)self.initUI2()def initUI2(self):layout = QVBoxLayout()self.label1 = QLabel('label1: hi i am wsw', self)layout.addWidget(self.label1)self.label2 = QLabel('label2: hi all ...', self)layout.addWidget(self.label2)layout.addStretch()self.label3 = QLabel('label3: hi all ...', self)layout.addWidget(self.label3)self.setLayout(layout)if __name__ == '__main__':app = QApplication(sys.argv)main = UiMainTwo()sys.exit(app.exec_())
